{"id":18740,"date":"2026-10-05T11:46:04","date_gmt":"2026-10-05T09:46:04","guid":{"rendered":"https:\/\/lettel.com\/?post_type=ressources&#038;p=18740"},"modified":"2026-10-05T16:24:44","modified_gmt":"2026-10-05T14:24:44","slug":"gtb-et-gtc-de-quoi-sagit-il-et-pourquoi-les-mettre-en-place","status":"publish","type":"ressources","link":"https:\/\/lettel.com\/fr\/ressources\/gtb-et-gtc-de-quoi-sagit-il-et-pourquoi-les-mettre-en-place\/","title":{"rendered":"GTB et GTC : de quoi s\u2019agit-il et pourquoi les mettre en place ?"},"content":{"rendered":"\r\n\r\n<section class=\"blc-heroSingle\">\r\n\r\n\t<div class=\"container\">\r\n\t\t<div class=\"row gy-5\">\r\n\r\n\t\t\t<div class=\"col-xl-5 col-lg-6\">\r\n\t\t\t\t<div class=\"blc-heroSingle_txt\">\r\n\t\t\t\t\t<div class=\"blc-heroSingle_dates\">\r\n\t\t\t\t\t\t<span class=\"blc-heroSingle_supttl\">Publi\u00e9 le 5 octobre 2026&nbsp;&#8211;<\/span>\r\n\t\t\t\t\t\t<span class=\"blc-heroSingle_supttl\">&nbsp;Modifi\u00e9 le 5 octobre 2026<\/span>\r\n\t\t\t\t\t<\/div>\r\n\t\t\t\t\t<h1 class='blc-heroSingle_ttl' class='blc-heroSingle_ttl' id=\"gtb-et-gtc-de-quoi-sagit-il-et-pourquoi-les-mettre-en-place\">GTB et GTC : de quoi s\u2019agit-il et pourquoi les mettre en place ?<\/h1>\r\n\t\t\t\t\t<p class=\"blc-heroSingle_data\">\r\n\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"blc-heroSingle_tags\">\r\n\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\r\n\t\t\t\t\t\t\t\t\t\t\t<\/p>\r\n\t\t\t\t<\/div>\r\n\t\t\t<\/div>\r\n\t\t\t\r\n\t\t\t<div class=\"col-xl-6 col-lg-5 offset-lg-1\">\r\n\t\t\t\t<figure class=\"heroSingle_med media-wrp__16x9 full\">\r\n\t\t\t\t\t<img decoding=\"async\" alt=\"GTB et GTC\" src=\"https:\/\/lettel.com\/wp-content\/uploads\/2026\/06\/gtb_gtc.jpg\" srcset=\"https:\/\/lettel.com\/wp-content\/uploads\/2026\/06\/gtb_gtc-300x245.jpg 300w, https:\/\/lettel.com\/wp-content\/uploads\/2026\/06\/gtb_gtc-768x628.jpg 768w, https:\/\/lettel.com\/wp-content\/uploads\/2026\/06\/gtb_gtc-600x490.jpg 600w, https:\/\/lettel.com\/wp-content\/uploads\/2026\/06\/gtb_gtc.jpg 1007w\" sizes=\"(min-width: 992px) 893px, (min-width: 1200px) 1080px, (min-width: 1400px) 1260px, (min-width: 1600px) 1440px, 100vw\">\t\t\t\t\t\t\t\t\t<\/figure>\r\n\t\t\t<\/div>\r\n\r\n\t\t<\/div>\r\n\t<\/div>\r\n<\/section>\r\n\r\n\n\n\r\n\r\n<section class=\"blc-content-post spc-s5 bg-cw \"> \r\n    <div class=\"container\">\r\n\r\n        <div class=\"row\">\r\n            <div class=\"col-lg-8\">\r\n                <div class=\"editor\">\r\n                    <style>\n#la-gtb-definition-et-fonctionnement {\n    margin: 0 !important;\n    padding: 0 !important;\n}\n<\/style>\n<p>Pour am\u00e9liorer la <strong>performance \u00e9nerg\u00e9tique<\/strong> de son b\u00e2timent, optimiser le <strong>confort des occupants<\/strong> et se conformer aux <strong>exigences r\u00e9glementaires<\/strong>, la mise en place d\u2019une <strong>GTB ou d\u2019une GTC<\/strong> performante et adapt\u00e9e est indispensable. Mais en quoi consiste concr\u00e8tement ces deux syst\u00e8mes de gestion ? Quelles sont leurs diff\u00e9rences ? Et pourquoi les mettre en \u0153uvre ? Les r\u00e9ponses dans cet article.<\/p>\n<h2 id=\"gtb-et-gtc-de-quoi-sagit-il\">GTB et GTC : de quoi s\u2019agit-il ?<\/h2>\n<h3 id=\"la-gtb-definition-et-fonctionnement\">La GTB : d\u00e9finition et fonctionnement<\/h3>\n<p>La <strong>Gestion Technique du B\u00e2timent (GTB)<\/strong>, aussi connu en anglais sous le nom de <strong>Building Management System (BMS)<\/strong> est un syst\u00e8me informatis\u00e9 qui permet de <strong>piloter, surveiller et optimiser l\u2019ensemble des \u00e9quipements techniques<\/strong> d\u2019un b\u00e2timent en simultan\u00e9e, depuis une <strong>interface unique et centralis\u00e9e<\/strong>. <\/p>\n<div class=\"p-3 mt-3\" style=\"background-color:#1B1945;color:#fff;font-weight:500;border-radius:12px;border-left:6px solid #FDC300;\">Chauffer, \u00e9clairer, ventiler, mesurer\u2026 la GTB permet de centraliser le pilotage du b\u00e2timent.<\/div>\n<div class=\"row g-3 my-2\">\n<div class=\"col-12 col-md-3 d-flex\">\n<div class=\"card p-3 w-100 text-center\" style=\"border:1px solid #e0e0e8;border-radius:12px;box-shadow:0 2px 15px rgba(27,25,69,0.08)\">\n<div style=\"font-size:2.5rem;\">\ud83c\udf21\ufe0f<\/div>\n<div class=\"mt-2\" style=\"color:#1B1945;font-weight:600;\">Chauffage, ventilation, climatisation (CVC)<\/div>\n<\/div>\n<\/div>\n<div class=\"col-12 col-md-3 d-flex\">\n<div class=\"card p-3 w-100 text-center\" style=\"border:1px solid #e0e0e8;border-radius:12px;box-shadow:0 2px 15px rgba(27,25,69,0.08)\">\n<div style=\"font-size:2.5rem;\">\ud83d\udca1<\/div>\n<div class=\"mt-2\" style=\"color:#1B1945;font-weight:600;\">\u00c9clairage des locaux<\/div>\n<\/div>\n<\/div>\n<div class=\"col-12 col-md-3 d-flex\">\n<div class=\"card p-3 w-100 text-center\" style=\"border:1px solid #e0e0e8;border-radius:12px;box-shadow:0 2px 15px rgba(27,25,69,0.08)\">\n<div style=\"font-size:2.5rem;\">\ud83d\udd12<\/div>\n<div class=\"mt-2\" style=\"color:#1B1945;font-weight:600;\">Dispositifs de s\u00e9curit\u00e9 et acc\u00e8s<\/div>\n<\/div>\n<\/div>\n<div class=\"col-12 col-md-3 d-flex\">\n<div class=\"card p-3 w-100 text-center\" style=\"border:1px solid #e0e0e8;border-radius:12px;box-shadow:0 2px 15px rgba(27,25,69,0.08)\">\n<div style=\"font-size:2.5rem;\">\ud83d\udebf<\/div>\n<div class=\"mt-2\" style=\"color:#1B1945;font-weight:600;\">Production d\u2019eau chaude sanitaire<\/div>\n<\/div>\n<\/div>\n<div class=\"col-12 col-md-3 d-flex\">\n<div class=\"card p-3 w-100 text-center\" style=\"border:1px solid #e0e0e8;border-radius:12px;box-shadow:0 2px 15px rgba(27,25,69,0.08)\">\n<div style=\"font-size:2.5rem;\">\ud83e\ude9f<\/div>\n<div class=\"mt-2\" style=\"color:#1B1945;font-weight:600;\">Stores et volets \u00e9lectriques<\/div>\n<\/div>\n<\/div>\n<div class=\"col-12 col-md-3 d-flex\">\n<div class=\"card p-3 w-100 text-center\" style=\"border:1px solid #e0e0e8;border-radius:12px;box-shadow:0 2px 15px rgba(27,25,69,0.08)\">\n<div style=\"font-size:2.5rem;\">\ud83d\ude97<\/div>\n<div class=\"mt-2\" style=\"color:#1B1945;font-weight:600;\">Gestion du stationnement et bornes IRVE<\/div>\n<\/div>\n<\/div>\n<div class=\"col-12 col-md-3 d-flex\">\n<div class=\"card p-3 w-100 text-center\" style=\"border:1px solid #e0e0e8;border-radius:12px;box-shadow:0 2px 15px rgba(27,25,69,0.08)\">\n<div style=\"font-size:2.5rem;\">\u2699\ufe0f<\/div>\n<div class=\"mt-2\" style=\"color:#1B1945;font-weight:600;\">Autres \u00e9quipements contr\u00f4lables \u00e0 distance<\/div>\n<\/div>\n<\/div>\n<\/div>\n<p>Concr\u00e8tement, une GTB s\u2019appuie sur un <strong>r\u00e9seau de capteurs et d\u2019\u00e9quipements communicants<\/strong> pour collecter les donn\u00e9es du b\u00e2timent telles que les <strong>consommations et param\u00e8tres \u00e9lectriques<\/strong>. <\/p>\n<p>Ces informations sont ensuite centralis\u00e9es et exploit\u00e9es par le syst\u00e8me de gestion, qui peut <strong>piloter les \u00e9quipements et automatiser certaines actions<\/strong>. <\/p>\n<p>Les <a href=\"https:\/\/lettel.com\/fr\/categories-produits\/mesure-electrique\/centrales-de-mesure\/\" style=\"color:#1B1945;\"><strong>centrales de mesure<\/strong><\/a> et <a href=\"https:\/\/lettel.com\/fr\/categories-produits\/mesure-electrique\/compteurs-electrique\/\" style=\"color:#1B1945;\"><strong>compteurs \u00e9lectriques communicants<\/strong><\/a> sont des maillons essentiels de cette cha\u00eene : install\u00e9s dans les tableaux \u00e9lectriques, ils remontent les donn\u00e9es de consommation de chaque d\u00e9part vers la GTB, via des protocoles ouverts comme <a href=\"https:\/\/www.modbus.org\/\" target=\"_blank\" rel=\"noopener\" style=\"color:#1B1945;\">Modbus<\/a>.<\/p>\n<p>La GTB est ainsi capable de : <\/p>\n<div class=\"row g-3 my-2\">\n<div class=\"col-12 col-md-6 d-flex\">\n<div class=\"card p-3 w-100\" style=\"border:1px solid #e0e0e8;border-radius:12px;box-shadow:0 2px 15px rgba(27,25,69,0.08)\">\n<div style=\"font-size:2.5rem;\">\ud83d\udcca<\/div>\n<div class=\"mt-2\" style=\"color:#1B1945;font-weight:600;\">Collecter et analyser les donn\u00e9es<\/div>\n<div>Temp\u00e9rature, pr\u00e9sence, luminosit\u00e9, CO2, consommation \u00e9nerg\u00e9tique\u2026 collect\u00e9s en <strong>temps r\u00e9el<\/strong> et analys\u00e9s.<\/div>\n<\/div>\n<\/div>\n<div class=\"col-12 col-md-6 d-flex\">\n<div class=\"card p-3 w-100\" style=\"border:1px solid #e0e0e8;border-radius:12px;box-shadow:0 2px 15px rgba(27,25,69,0.08)\">\n<div style=\"font-size:2.5rem;\">\u26a1<\/div>\n<div class=\"mt-2\" style=\"color:#1B1945;font-weight:600;\">Automatiser des actions<\/div>\n<div>Selon des <strong>sc\u00e9narios pr\u00e9d\u00e9finis<\/strong> : r\u00e9gulation de la temp\u00e9rature, extinction des luminaires, ajustement de la ventilation\u2026<\/div>\n<\/div>\n<\/div>\n<div class=\"col-12 col-md-6 d-flex\">\n<div class=\"card p-3 w-100\" style=\"border:1px solid #e0e0e8;border-radius:12px;box-shadow:0 2px 15px rgba(27,25,69,0.08)\">\n<div style=\"font-size:2.5rem;\">\ud83d\udea8<\/div>\n<div class=\"mt-2\" style=\"color:#1B1945;font-weight:600;\">Alerter en cas d&rsquo;anomalie<\/div>\n<div>Surconsommation, panne, temp\u00e9rature anormale\u2026 via des <strong>notifications en temps r\u00e9el<\/strong> (SMS, email, alarmes visuelles ou sonores).<\/div>\n<\/div>\n<\/div>\n<div class=\"col-12 col-md-6 d-flex\">\n<div class=\"card p-3 w-100\" style=\"border:1px solid #e0e0e8;border-radius:12px;box-shadow:0 2px 15px rgba(27,25,69,0.08)\">\n<div style=\"font-size:2.5rem;\">\ud83d\udcc8<\/div>\n<div class=\"mt-2\" style=\"color:#1B1945;font-weight:600;\">G\u00e9n\u00e9rer des rapports de performance<\/div>\n<div>Pour suivre de pr\u00e8s les <strong>consommations \u00e9nerg\u00e9tiques<\/strong>, l&rsquo;\u00e9tat des \u00e9quipements et l&rsquo;efficacit\u00e9 des installations.<\/div>\n<\/div>\n<\/div>\n<\/div>\n<h3 id=\"la-gtc-definition-et-fonctionnement\">La GTC : d\u00e9finition et fonctionnement<\/h3>\n<p>La <strong>GTC (Gestion Technique Centralis\u00e9e)<\/strong> peut quant \u00e0 elle <strong>contr\u00f4ler un seul lot<\/strong>, comme le chauffage, l\u2019\u00e9clairage ou la s\u00e9curit\u00e9. Elle fonctionne comme la GTB, \u00e0 l\u2019aide de <strong>capteurs, d\u2019actionneurs, de sc\u00e9narios programm\u00e9s et d\u2019une interface de gestion<\/strong>. Elle peut effectuer des transmissions de mesures, analyser des donn\u00e9es, contr\u00f4ler un \u00e9quipement \u00e0 distance et transmettre l\u2019information en temps r\u00e9el, sur une interface unique. <\/p>\n<p>Le syst\u00e8me peut par exemple baisser ou augmenter la temp\u00e9rature d\u2019une pi\u00e8ce en fonction des horaires de la journ\u00e9e et de la nuit ; d\u00e9tecter une panne sur une chaudi\u00e8re ou encore g\u00e9rer l\u2019\u00e9clairage d\u2019un b\u00e2timent industriel selon la pr\u00e9sence. Contrairement \u00e0 la GTB, elle se concentre toutefois sur <strong>un seul \u00e9quipement \u00e0 la fois<\/strong>. <\/p>\n<div class=\"p-4 my-4\" style=\"background-color:#1B1945;color:#fff;border-radius:12px;border-left:6px solid #FDC300;\">\n<div class=\"mb-2\" style=\"color:#FDC300;font-weight:700;text-transform:uppercase;letter-spacing:1px;\">Bon \u00e0 savoir<\/div>\n<div style=\"line-height:1.7;\">Les termes \u00ab GTB \u00bb et \u00ab GTC \u00bb s\u2019appliquent uniquement au secteur industriel et tertiaire.<br \/>Au sein de b\u00e2timents d\u2019habitation, on parle de domotique.<\/div>\n<\/div>\n<h3 id=\"gtb-et-gtc-quelles-differences\">GTB et GTC : quelles diff\u00e9rences ?<\/h3>\n<p>La gestion technique centralis\u00e9e est, en quelque sorte, <strong>une composante de la GTB<\/strong>. Cette derni\u00e8re int\u00e8gre en fait des donn\u00e9es de plusieurs GTC. Autrement dit, alors que la GTC se concentre sur un <strong>p\u00e9rim\u00e8tre pr\u00e9cis<\/strong> de mani\u00e8re ind\u00e9pendante (r\u00e9gulation du chauffage, gestion de l\u2019\u00e9clairage ou de la s\u00e9curit\u00e9 incendie), la GTB <strong>relie ces diff\u00e9rents lots entre eux au sein d\u2019une plateforme unique<\/strong>, offrant une vue d\u2019ensemble sur tout le b\u00e2timent. <\/p>\n<h2 id=\"pourquoi-mettre-en-place-une-gtb-gtc\">Pourquoi mettre en place une GTB \/ GTC ?<\/h2>\n<p>La gestion technique du b\u00e2timent (GTB) et la gestion technique centralis\u00e9e (GTC) permettent de <strong>centraliser les donn\u00e9es des \u00e9quipements, de suivre leur fonctionnement et d\u2019agir sur les installations depuis une interface unique<\/strong>.<\/p>\n<p>Ces syst\u00e8mes offrent une <strong>vision en temps r\u00e9el des installations techniques<\/strong> et facilitent le suivi des consommations, la d\u00e9tection des anomalies et l\u2019optimisation du fonctionnement des \u00e9quipements.<\/p>\n<p>L\u2019objectif : <strong>mieux exploiter les installations, am\u00e9liorer leur performance et disposer des bonnes informations pour prendre les bonnes d\u00e9cisions.<\/strong><\/p>\n<div class=\"my-4\"><img decoding=\"async\" src=\"https:\/\/lettel.com\/wp-content\/uploads\/2026\/04\/gtb-gtc.jpg\" alt=\"Donn\u00e9es GTB\" class=\"img-fluid w-100\" style=\"border-radius:12px;object-fit:cover;max-height:380px;\"><\/div>\n<p>Voici les <strong>principaux avantages<\/strong> \u00e0 mettre en place une GTB ou une GTC :<\/p>\n<div class=\"row g-3 my-2\">\n<div class=\"col-12 col-sm-6 col-lg-4 d-flex\">\n<div class=\"card p-3 w-100\" style=\"border:1px solid #e0e0e8;border-radius:12px;box-shadow:0 2px 15px rgba(27,25,69,0.08)\">\n<div style=\"font-size:2.5rem;\">\ud83d\ude0a<\/div>\n<div class=\"mt-2\" style=\"color:#1B1945;font-weight:600;\">Confort des occupants<\/div>\n<div>Am\u00e9liorer le confort et la qualit\u00e9 de vie des occupants gr\u00e2ce \u00e0 une <strong>r\u00e9gulation optimale<\/strong> de la temp\u00e9rature et de la luminosit\u00e9.<\/div>\n<\/div>\n<\/div>\n<div class=\"col-12 col-sm-6 col-lg-4 d-flex\">\n<div class=\"card p-3 w-100\" style=\"border:1px solid #e0e0e8;border-radius:12px;box-shadow:0 2px 15px rgba(27,25,69,0.08)\">\n<div style=\"font-size:2.5rem;\">\u26a1<\/div>\n<div class=\"mt-2\" style=\"color:#1B1945;font-weight:600;\">Consommations r\u00e9duites<\/div>\n<div>R\u00e9duire les consommations \u00e9nerg\u00e9tiques du site gr\u00e2ce \u00e0 un <strong>contr\u00f4le intelligent<\/strong> des diff\u00e9rents syst\u00e8mes.<\/div>\n<\/div>\n<\/div>\n<div class=\"col-12 col-sm-6 col-lg-4 d-flex\">\n<div class=\"card p-3 w-100\" style=\"border:1px solid #e0e0e8;border-radius:12px;box-shadow:0 2px 15px rgba(27,25,69,0.08)\">\n<div style=\"font-size:2.5rem;\">\ud83d\udcb0<\/div>\n<div class=\"mt-2\" style=\"color:#1B1945;font-weight:600;\">Co\u00fbts d\u2019exploitation ma\u00eetris\u00e9s<\/div>\n<div>R\u00e9duire les <strong>co\u00fbts d\u2019exploitation<\/strong> de son b\u00e2timent.<\/div>\n<\/div>\n<\/div>\n<div class=\"col-12 col-sm-6 col-lg-4 d-flex\">\n<div class=\"card p-3 w-100\" style=\"border:1px solid #e0e0e8;border-radius:12px;box-shadow:0 2px 15px rgba(27,25,69,0.08)\">\n<div style=\"font-size:2.5rem;\">\ud83c\udfe2<\/div>\n<div class=\"mt-2\" style=\"color:#1B1945;font-weight:600;\">Patrimoine valoris\u00e9<\/div>\n<div>Valoriser son <strong>patrimoine immobilier<\/strong>.<\/div>\n<\/div>\n<\/div>\n<div class=\"col-12 col-sm-6 col-lg-4 d-flex\">\n<div class=\"card p-3 w-100\" style=\"border:1px solid #e0e0e8;border-radius:12px;box-shadow:0 2px 15px rgba(27,25,69,0.08)\">\n<div style=\"font-size:2.5rem;\">\ud83d\udd27<\/div>\n<div class=\"mt-2\" style=\"color:#1B1945;font-weight:600;\">Maintenance pr\u00e9dictive<\/div>\n<div>Faciliter la maintenance pr\u00e9dictive des \u00e9quipements et <strong>prolonger leur dur\u00e9e de vie<\/strong> gr\u00e2ce \u00e0 une d\u00e9tection rapide et automatis\u00e9e des anomalies.<\/div>\n<\/div>\n<\/div>\n<div class=\"col-12 col-sm-6 col-lg-4 d-flex\">\n<div class=\"card p-3 w-100\" style=\"border:1px solid #e0e0e8;border-radius:12px;box-shadow:0 2px 15px rgba(27,25,69,0.08)\">\n<div style=\"font-size:2.5rem;\">\ud83d\udcdc<\/div>\n<div class=\"mt-2\" style=\"color:#1B1945;font-weight:600;\">Conformit\u00e9 r\u00e9glementaire<\/div>\n<div>Assurer la conformit\u00e9 r\u00e9glementaire du b\u00e2timent en continu (notamment au regard du <strong>d\u00e9cret BACS<\/strong> et du <strong>d\u00e9cret \u00c9co \u00c9nergie Tertiaire<\/strong>).<\/div>\n<\/div>\n<\/div>\n<div class=\"col-12 col-sm-6 col-lg-4 d-flex\">\n<div class=\"card p-3 w-100\" style=\"border:1px solid #e0e0e8;border-radius:12px;box-shadow:0 2px 15px rgba(27,25,69,0.08)\">\n<div style=\"font-size:2.5rem;\">\ud83d\udd12<\/div>\n<div class=\"mt-2\" style=\"color:#1B1945;font-weight:600;\">S\u00e9curit\u00e9 renforc\u00e9e<\/div>\n<div>Renforcer le niveau de s\u00e9curit\u00e9 sur le site gr\u00e2ce \u00e0 la <strong>gestion centralis\u00e9e<\/strong> des acc\u00e8s, des syst\u00e8mes de protection incendie ou encore des dispositifs de vid\u00e9osurveillance.<\/div>\n<\/div>\n<\/div>\n<div class=\"col-12 col-sm-6 col-lg-4 d-flex\">\n<div class=\"card p-3 w-100\" style=\"border:1px solid #e0e0e8;border-radius:12px;box-shadow:0 2px 15px rgba(27,25,69,0.08)\">\n<div style=\"font-size:2.5rem;\">\ud83d\uddc2\ufe0f<\/div>\n<div class=\"mt-2\" style=\"color:#1B1945;font-weight:600;\">Tra\u00e7abilit\u00e9 des donn\u00e9es<\/div>\n<div>Am\u00e9liorer la tra\u00e7abilit\u00e9 des donn\u00e9es et le suivi des performances gr\u00e2ce \u00e0 l\u2019acc\u00e8s aux <strong>donn\u00e9es historiques<\/strong>.<\/div>\n<\/div>\n<\/div>\n<div class=\"col-12 col-sm-6 col-lg-4 d-flex\">\n<div class=\"card p-3 w-100\" style=\"border:1px solid #e0e0e8;border-radius:12px;box-shadow:0 2px 15px rgba(27,25,69,0.08)\">\n<div style=\"font-size:2.5rem;\">\ud83c\udfaf<\/div>\n<div class=\"mt-2\" style=\"color:#1B1945;font-weight:600;\">D\u00e9cisions \u00e9clair\u00e9es<\/div>\n<div>Faciliter la prise de d\u00e9cisions \u00e9clair\u00e9es gr\u00e2ce \u00e0 des <strong>informations fiables et actualis\u00e9es<\/strong>.<\/div>\n<\/div>\n<\/div>\n<div class=\"col-12 col-sm-6 col-lg-4 d-flex\">\n<div class=\"card p-3 w-100\" style=\"border:1px solid #e0e0e8;border-radius:12px;box-shadow:0 2px 15px rgba(27,25,69,0.08)\">\n<div style=\"font-size:2.5rem;\">\ud83d\udee1\ufe0f<\/div>\n<div class=\"mt-2\" style=\"color:#1B1945;font-weight:600;\">Continuit\u00e9 d\u2019activit\u00e9<\/div>\n<div>Limiter les risques de <strong>pannes prolong\u00e9es<\/strong>, d\u2019arr\u00eat de l\u2019activit\u00e9 et de failles de s\u00e9curit\u00e9 gr\u00e2ce \u00e0 une d\u00e9tection rapide des anomalies.<\/div>\n<\/div>\n<\/div>\n<div class=\"col-12 col-sm-6 col-lg-4 d-flex\">\n<div class=\"card p-3 w-100\" style=\"border:1px solid #e0e0e8;border-radius:12px;box-shadow:0 2px 15px rgba(27,25,69,0.08)\">\n<div style=\"font-size:2.5rem;\">\ud83d\udea8<\/div>\n<div class=\"mt-2\" style=\"color:#1B1945;font-weight:600;\">R\u00e9activit\u00e9 en cas d\u2019incident<\/div>\n<div>Am\u00e9liorer la r\u00e9activit\u00e9 en cas d\u2019incident gr\u00e2ce aux <strong>alertes en temps r\u00e9el<\/strong>.<\/div>\n<\/div>\n<\/div>\n<div class=\"col-12 col-sm-6 col-lg-4 d-flex\">\n<div class=\"card p-3 w-100\" style=\"border:1px solid #e0e0e8;border-radius:12px;box-shadow:0 2px 15px rgba(27,25,69,0.08)\">\n<div style=\"font-size:2.5rem;\">\ud83c\udf31<\/div>\n<div class=\"mt-2\" style=\"color:#1B1945;font-weight:600;\">Empreinte carbone r\u00e9duite<\/div>\n<div>R\u00e9duire l\u2019empreinte carbone de son b\u00e2timent et renforcer sa <strong>d\u00e9marche RSE<\/strong> (Responsabilit\u00e9 Soci\u00e9tale des Entreprises).<\/div>\n<\/div>\n<\/div>\n<\/div>\n<h2 id=\"la-mise-en-place-dune-gtb-gtc-est-elle-obligatoire\">La mise en place d\u2019une GTB \/ GTC est-elle obligatoire ?<\/h2>\n<p>La mise en place d\u2019une GTB ou d\u2019une GTC est <strong>obligatoire pour les b\u00e2timents soumis au <a href=\"https:\/\/lettel.com\/fr\/ressources\/decret-bacs\/\" style=\"color:#1B1945;\">d\u00e9cret BACS<\/a> et au <a href=\"https:\/\/lettel.com\/fr\/ressources\/decret-tertiaire\/\" style=\"color:#1B1945;\">d\u00e9cret tertiaire<\/a><\/strong>.<\/p>\n<h3 id=\"le-decret-eco-energie-tertiaire\">Le d\u00e9cret \u00c9co \u00c9nergie Tertiaire<\/h3>\n<p>Pour rappel, le <a href=\"https:\/\/www.legifrance.gouv.fr\/jorf\/id\/JORFTEXT000038812251\" target=\"_blank\" rel=\"noopener\" style=\"color:#1B1945;\"><strong>d\u00e9cret \u00c9co \u00c9nergie Tertiaire (DEET)<\/strong><\/a> est entr\u00e9 en vigueur en <strong>2019<\/strong> pour r\u00e9duire, de fa\u00e7on progressive, la consommation \u00e9nerg\u00e9tique des b\u00e2timents \u00e0 usage tertiaire en France.<\/p>\n<p>Il d\u00e9coule de la <a href=\"https:\/\/www.legifrance.gouv.fr\/loda\/id\/JORFTEXT000037639478\" target=\"_blank\" rel=\"noopener\" style=\"color:#1B1945;\"><strong>loi \u00c9LAN<\/strong><\/a> (\u00c9volution du Logement, de l\u2019Am\u00e9nagement et du Num\u00e9rique), promulgu\u00e9e fin 2018 dans le cadre de la transition \u00e9nerg\u00e9tique et de la lutte contre le changement climatique. Son objectif : <strong>r\u00e9duire de 60 % la consommation \u00e9nerg\u00e9tique des b\u00e2timents tertiaires de plus de 1 000 m\u00b2 \u00e0 l\u2019horizon 2050<\/strong>.<\/p>\n<div class=\"row g-3 my-2 text-center\">\n<div class=\"col-12 col-md-4 d-flex\">\n<div class=\"card p-3 w-100 justify-content-center\" style=\"border:1px solid #e0e0e8;border-radius:12px;box-shadow:0 2px 15px rgba(27,25,69,0.08)\">\n<div style=\"font-weight:700;font-size:2rem;color:#FDC300;\">2019<\/div>\n<div style=\"color:#1B1945;font-weight:500;\">Entr\u00e9e en vigueur<\/div>\n<\/div>\n<\/div>\n<div class=\"col-12 col-md-4 d-flex\">\n<div class=\"card p-3 w-100 justify-content-center\" style=\"border:1px solid #e0e0e8;border-radius:12px;box-shadow:0 2px 15px rgba(27,25,69,0.08)\">\n<div style=\"font-weight:700;font-size:2rem;color:#FDC300;\">\u2265 1 000 m\u00b2<\/div>\n<div style=\"color:#1B1945;font-weight:500;\">Surface de plancher \u00e0 usage tertiaire<\/div>\n<\/div>\n<\/div>\n<div class=\"col-12 col-md-4 d-flex\">\n<div class=\"card p-3 w-100 justify-content-center\" style=\"border:1px solid #e0e0e8;border-radius:12px;box-shadow:0 2px 15px rgba(27,25,69,0.08)\">\n<div style=\"font-weight:700;font-size:2rem;color:#FDC300;\">-60 %<\/div>\n<div style=\"color:#1B1945;font-weight:500;\">Objectif de r\u00e9duction des consommations en 2050<\/div>\n<\/div>\n<\/div>\n<\/div>\n<p>Le d\u00e9cret tertiaire s\u2019applique \u00e0 <strong>tous les b\u00e2timents, parties de b\u00e2timents ou ensembles immobiliers \u00e0 usage tertiaire dont la surface de plancher atteint ou d\u00e9passe 1 000 m\u00b2<\/strong>. Cela inclut par exemple :<\/p>\n<div class=\"row g-3 my-2 text-center\">\n<div class=\"col-6 col-md-3\">\n<div style=\"font-size:1.8rem;\">\ud83c\udfe2<\/div>\n<div style=\"color:#1B1945;font-weight:500;\">Bureaux<\/div>\n<\/div>\n<div class=\"col-6 col-md-3\">\n<div style=\"font-size:1.8rem;\">\ud83d\udecd\ufe0f<\/div>\n<div style=\"color:#1B1945;font-weight:500;\">Commerces<\/div>\n<\/div>\n<div class=\"col-6 col-md-3\">\n<div style=\"font-size:1.8rem;\">\ud83c\udfe5<\/div>\n<div style=\"color:#1B1945;font-weight:500;\">H\u00f4pitaux<\/div>\n<\/div>\n<div class=\"col-6 col-md-3\">\n<div style=\"font-size:1.8rem;\">\ud83c\udfeb<\/div>\n<div style=\"color:#1B1945;font-weight:500;\">\u00c9coles<\/div>\n<\/div>\n<div class=\"col-6 col-md-3\">\n<div style=\"font-size:1.8rem;\">\ud83c\udf7d\ufe0f<\/div>\n<div style=\"color:#1B1945;font-weight:500;\">Restaurants<\/div>\n<\/div>\n<div class=\"col-6 col-md-3\">\n<div style=\"font-size:1.8rem;\">\u2708\ufe0f<\/div>\n<div style=\"color:#1B1945;font-weight:500;\">A\u00e9roports<\/div>\n<\/div>\n<div class=\"col-6 col-md-3\">\n<div style=\"font-size:1.8rem;\">\ud83c\udfed<\/div>\n<div style=\"color:#1B1945;font-weight:500;\">Sites industriels<\/div>\n<\/div>\n<div class=\"col-6 col-md-3\">\n<div style=\"font-size:1.8rem;\">\ud83c\udfdf\ufe0f<\/div>\n<div style=\"color:#1B1945;font-weight:500;\">\u00c9quipements sportifs<\/div>\n<\/div>\n<\/div>\n<p>Les <strong>propri\u00e9taires ou preneurs de bail<\/strong> assujettis doivent s\u2019engager \u00e0 <strong>diminuer leur consommation \u00e9nerg\u00e9tique finale<\/strong> (par rapport \u00e0 une ann\u00e9e de r\u00e9f\u00e9rence ne pouvant pas \u00eatre ant\u00e9rieure \u00e0 2010), \u00e0 hauteur de :<\/p>\n<div class=\"row g-3 my-2 text-center\">\n<div class=\"col-12 col-md-4 d-flex\">\n<div class=\"card p-3 w-100 justify-content-center\" style=\"border:1px solid #e0e0e8;border-radius:12px;box-shadow:0 2px 15px rgba(27,25,69,0.08)\">\n<div style=\"font-weight:700;font-size:2rem;color:#FDC300;\">-40 %<\/div>\n<div style=\"color:#1B1945;font-weight:500;\">d\u2019ici 2030<\/div>\n<\/div>\n<\/div>\n<div class=\"col-12 col-md-4 d-flex\">\n<div class=\"card p-3 w-100 justify-content-center\" style=\"border:1px solid #e0e0e8;border-radius:12px;box-shadow:0 2px 15px rgba(27,25,69,0.08)\">\n<div style=\"font-weight:700;font-size:2rem;color:#FDC300;\">-50 %<\/div>\n<div style=\"color:#1B1945;font-weight:500;\">d\u2019ici 2040<\/div>\n<\/div>\n<\/div>\n<div class=\"col-12 col-md-4 d-flex\">\n<div class=\"card p-3 w-100 justify-content-center\" style=\"border:1px solid #e0e0e8;border-radius:12px;box-shadow:0 2px 15px rgba(27,25,69,0.08)\">\n<div style=\"font-weight:700;font-size:2rem;color:#FDC300;\">-60 %<\/div>\n<div style=\"color:#1B1945;font-weight:500;\">d\u2019ici 2050<\/div>\n<\/div>\n<\/div>\n<\/div>\n<p><strong>Ou<\/strong>, alternativement, atteindre une <strong>consommation \u00e9nerg\u00e9tique finale fix\u00e9e en valeur absolue<\/strong>, d\u00e9finie par arr\u00eat\u00e9 selon le type d\u2019activit\u00e9 et les indicateurs d\u2019intensit\u00e9 d\u2019usage.<\/p>\n<p>La mise en place d\u2019une gestion technique des b\u00e2timents est donc <strong>indispensable pour les sites soumis \u00e0 cette exigence r\u00e9glementaire<\/strong>. En facilitant le <strong>suivi, l\u2019enregistrement et l\u2019analyse des consommations<\/strong>, la GTB et la GTC permettent de renforcer les performances \u00e9nerg\u00e9tiques du b\u00e2timent et de faciliter l\u2019atteinte des objectifs fix\u00e9s par le d\u00e9cret \u00c9co \u00c9nergie Tertiaire.<\/p>\n<p><!-- PHOTO 2 : Chaufferie ou local technique CVC (pompes, tuyauteries, centrale de traitement d'air) dans un b\u00e2timent tertiaire. Illustre les syst\u00e8mes de chauffage \/ climatisation vis\u00e9s par le d\u00e9cret BACS. Format paysage. --><\/p>\n<div class=\"my-4\"><img decoding=\"async\" src=\"https:\/\/lettel.com\/wp-content\/uploads\/2026\/09\/ingenieur_gtb.jpg\" alt=\"Ing\u00e9nieur GTB\" class=\"img-fluid w-100\" style=\"border-radius:12px;object-fit:cover;max-height:380px;\"><\/div>\n<h3 id=\"le-decret-bacs\">Le d\u00e9cret BACS<\/h3>\n<p>Le <strong>d\u00e9cret BACS<\/strong> (Building Automation and Control System \u2013 syst\u00e8me d\u2019automatisation et de contr\u00f4le des b\u00e2timents) est un texte r\u00e9glementaire entr\u00e9 en vigueur en <strong>juillet 2021<\/strong>, qui d\u00e9coule du d\u00e9cret tertiaire.<\/p>\n<p>Il impose aux propri\u00e9taires de certains b\u00e2timents tertiaires non r\u00e9sidentiels d\u2019<strong>installer un syst\u00e8me d\u2019automatisation et de contr\u00f4le \u00e9nerg\u00e9tique<\/strong>, afin de r\u00e9pondre aux objectifs de r\u00e9duction de consommation \u00e9nerg\u00e9tique impos\u00e9s par le d\u00e9cret tertiaire.<\/p>\n<p>Le d\u00e9cret BACS concerne l\u2019ensemble des b\u00e2timents tertiaires, qu\u2019ils soient <strong>neufs ou existants, publics ou priv\u00e9s<\/strong>, disposant de <strong>syst\u00e8mes de chauffage et\/ou de climatisation<\/strong>, associ\u00e9s ou non \u00e0 une ventilation, et dont la <strong>puissance nominale utile<\/strong> d\u00e9passe :<\/p>\n<div class=\"row g-3 my-2 text-center\">\n<div class=\"col-12 col-md-6 d-flex\">\n<div class=\"card p-3 w-100 justify-content-center\" style=\"border:1px solid #e0e0e8;border-radius:12px;box-shadow:0 2px 15px rgba(27,25,69,0.08)\">\n<div style=\"font-weight:700;font-size:2rem;color:#FDC300;\">&gt; 290 kW<\/div>\n<div style=\"color:#1B1945;font-weight:500;\">depuis le 1<sup>er<\/sup> janvier 2025<\/div>\n<\/div>\n<\/div>\n<div class=\"col-12 col-md-6 d-flex\">\n<div class=\"card p-3 w-100 justify-content-center\" style=\"border:1px solid #e0e0e8;border-radius:12px;box-shadow:0 2px 15px rgba(27,25,69,0.08)\">\n<div style=\"font-weight:700;font-size:2rem;color:#FDC300;\">&gt; 70 kW<\/div>\n<div style=\"color:#1B1945;font-weight:500;\">au 1<sup>er<\/sup> janvier 2030<\/div>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"mb-3\">L\u2019\u00e9ch\u00e9ance pour les b\u00e2timents existants entre 70 et 290 kW, initialement fix\u00e9e \u00e0 2027, a \u00e9t\u00e9 <strong>report\u00e9e au 1<sup>er<\/sup> janvier 2030<\/strong> par le <a href=\"https:\/\/www.legifrance.gouv.fr\/jorf\/id\/JORFTEXT000053175245\" target=\"_blank\" rel=\"noopener\" style=\"color:#1B1945;\">d\u00e9cret du 26 d\u00e9cembre 2025<\/a>. Pour les <strong>b\u00e2timents neufs<\/strong>, l\u2019obligation s\u2019applique d\u00e8s 70 kW depuis le 8 avril 2024.<\/div>\n<p>Pour r\u00e9pondre aux exigences du d\u00e9cret BACS, le syst\u00e8me mis en place doit \u00eatre capable de :<\/p>\n<div class=\"row g-3 my-2\">\n<div class=\"col-12 col-md-6 d-flex\">\n<div class=\"card p-3 w-100 d-flex flex-column flex-md-row align-items-start align-items-md-center gap-2 gap-md-3\" style=\"border:1px solid #e0e0e8;border-radius:12px;box-shadow:0 2px 15px rgba(27,25,69,0.08)\">\n<div class=\"flex-shrink-0 d-flex align-items-center justify-content-center\" style=\"width:44px;height:44px;border-radius:50%;background-color:#FDC300;color:#1B1945;font-weight:700;\">1<\/div>\n<div><strong style=\"color:#1B1945;\">Mesurer, enregistrer et analyser<\/strong> en continu les consommations d\u2019\u00e9nergie, en temps r\u00e9el.<\/div>\n<\/div>\n<\/div>\n<div class=\"col-12 col-md-6 d-flex\">\n<div class=\"card p-3 w-100 d-flex flex-column flex-md-row align-items-start align-items-md-center gap-2 gap-md-3\" style=\"border:1px solid #e0e0e8;border-radius:12px;box-shadow:0 2px 15px rgba(27,25,69,0.08)\">\n<div class=\"flex-shrink-0 d-flex align-items-center justify-content-center\" style=\"width:44px;height:44px;border-radius:50%;background-color:#FDC300;color:#1B1945;font-weight:700;\">2<\/div>\n<div><strong style=\"color:#1B1945;\">Optimiser automatiquement<\/strong> le fonctionnement des \u00e9quipements pour en am\u00e9liorer le rendement \u00e9nerg\u00e9tique.<\/div>\n<\/div>\n<\/div>\n<div class=\"col-12 col-md-6 d-flex\">\n<div class=\"card p-3 w-100 d-flex flex-column flex-md-row align-items-start align-items-md-center gap-2 gap-md-3\" style=\"border:1px solid #e0e0e8;border-radius:12px;box-shadow:0 2px 15px rgba(27,25,69,0.08)\">\n<div class=\"flex-shrink-0 d-flex align-items-center justify-content-center\" style=\"width:44px;height:44px;border-radius:50%;background-color:#FDC300;color:#1B1945;font-weight:700;\">3<\/div>\n<div><strong style=\"color:#1B1945;\">Identifier les anomalies<\/strong>, d\u00e9rives ou baisses de performance pour permettre une intervention rapide.<\/div>\n<\/div>\n<\/div>\n<div class=\"col-12 col-md-6 d-flex\">\n<div class=\"card p-3 w-100 d-flex flex-column flex-md-row align-items-start align-items-md-center gap-2 gap-md-3\" style=\"border:1px solid #e0e0e8;border-radius:12px;box-shadow:0 2px 15px rgba(27,25,69,0.08)\">\n<div class=\"flex-shrink-0 d-flex align-items-center justify-content-center\" style=\"width:44px;height:44px;border-radius:50%;background-color:#FDC300;color:#1B1945;font-weight:700;\">4<\/div>\n<div><strong style=\"color:#1B1945;\">Communiquer<\/strong> avec les autres syst\u00e8mes techniques du b\u00e2timent, gr\u00e2ce \u00e0 une architecture connect\u00e9e.<\/div>\n<\/div>\n<\/div>\n<div class=\"col-12 col-md-6 d-flex\">\n<div class=\"card p-3 w-100 d-flex flex-column flex-md-row align-items-start align-items-md-center gap-2 gap-md-3\" style=\"border:1px solid #e0e0e8;border-radius:12px;box-shadow:0 2px 15px rgba(27,25,69,0.08)\">\n<div class=\"flex-shrink-0 d-flex align-items-center justify-content-center\" style=\"width:44px;height:44px;border-radius:50%;background-color:#FDC300;color:#1B1945;font-weight:700;\">5<\/div>\n<div><strong style=\"color:#1B1945;\">Conserver les donn\u00e9es<\/strong> pendant au moins cinq ans, sous format num\u00e9rique.<\/div>\n<\/div>\n<\/div>\n<div class=\"col-12 col-md-6 d-flex\">\n<div class=\"card p-3 w-100 d-flex flex-column flex-md-row align-items-start align-items-md-center gap-2 gap-md-3\" style=\"border:1px solid #e0e0e8;border-radius:12px;box-shadow:0 2px 15px rgba(27,25,69,0.08)\">\n<div class=\"flex-shrink-0 d-flex align-items-center justify-content-center\" style=\"width:44px;height:44px;border-radius:50%;background-color:#FDC300;color:#1B1945;font-weight:700;\">6<\/div>\n<div><strong style=\"color:#1B1945;\">Comparer les consommations<\/strong> r\u00e9elles \u00e0 une valeur de r\u00e9f\u00e9rence, afin de suivre les progr\u00e8s r\u00e9alis\u00e9s.<\/div>\n<\/div>\n<\/div>\n<div class=\"col-12 col-md-6 d-flex\">\n<div class=\"card p-3 w-100 d-flex flex-column flex-md-row align-items-start align-items-md-center gap-2 gap-md-3\" style=\"border:1px solid #e0e0e8;border-radius:12px;box-shadow:0 2px 15px rgba(27,25,69,0.08)\">\n<div class=\"flex-shrink-0 d-flex align-items-center justify-content-center\" style=\"width:44px;height:44px;border-radius:50%;background-color:#FDC300;color:#1B1945;font-weight:700;\">7<\/div>\n<div><strong style=\"color:#1B1945;\">Assurer une interop\u00e9rabilit\u00e9 compl\u00e8te<\/strong>, via des protocoles ouverts comme Modbus.<\/div>\n<\/div>\n<\/div>\n<div class=\"col-12 col-md-6 d-flex\">\n<div class=\"card p-3 w-100 d-flex flex-column flex-md-row align-items-start align-items-md-center gap-2 gap-md-3\" style=\"border:1px solid #e0e0e8;border-radius:12px;box-shadow:0 2px 15px rgba(27,25,69,0.08)\">\n<div class=\"flex-shrink-0 d-flex align-items-center justify-content-center\" style=\"width:44px;height:44px;border-radius:50%;background-color:#FDC300;color:#1B1945;font-weight:700;\">8<\/div>\n<div><strong style=\"color:#1B1945;\">Permettre une gestion autonome et coordonn\u00e9e<\/strong> de l\u2019ensemble des syst\u00e8mes techniques du b\u00e2timent.<\/div>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"card p-3 my-3\" style=\"border:1px solid #e0e0e8;border-left:6px solid #FDC300;border-radius:12px;box-shadow:0 2px 15px rgba(27,25,69,0.08)\">\n<div>Pour se mettre en conformit\u00e9, l\u2019<a href=\"https:\/\/www.ademe.fr\/\" target=\"_blank\" rel=\"noopener\" style=\"color:#1B1945;\"><strong>ADEME<\/strong><\/a> (Agence de la transition \u00e9cologique) recommande l\u2019installation d\u2019un syst\u00e8me de GTB <strong>de classe A ou B, selon la norme <a href=\"https:\/\/www.iso.org\/standard\/65883.html\" target=\"_blank\" rel=\"noopener\" style=\"color:#1B1945;\">NF EN ISO 52120-1<\/a><\/strong>.<\/div>\n<\/div>\n<div class=\"p-4 my-4\" style=\"background-color:#1B1945;color:#fff;border-radius:12px;border-left:6px solid #FDC300;\">\n<div class=\"mb-2\" style=\"color:#FDC300;font-weight:700;text-transform:uppercase;letter-spacing:1px;\">Bon \u00e0 savoir<\/div>\n<div class=\"mb-2\" style=\"line-height:1.7;\">M\u00eame si votre b\u00e2timent n\u2019est pas soumis au d\u00e9cret BACS et au d\u00e9cret tertiaire, mettre en place une GTB ou une GTC reste fortement recommand\u00e9.<\/div>\n<div style=\"line-height:1.7;\">Ces dispositifs am\u00e9liorent le confort des b\u00e2timents, renforcent la performance \u00e9nerg\u00e9tique et inscrivent le site dans une d\u00e9marche de gestion durable. C\u2019est \u00e9galement un bon moyen d\u2019anticiper les \u00e9ventuelles r\u00e9glementations futures.<\/div>\n<\/div>\n<h3 id=\"dans-lindustrie-ou-le-residentiel\">Dans l\u2019industrie ou le r\u00e9sidentiel<\/h3>\n<p>Les d\u00e9crets BACS et \u00c9co \u00c9nergie Tertiaire visent les <strong>b\u00e2timents \u00e0 usage tertiaire<\/strong>. Les autres secteurs ne sont pas soumis \u00e0 une obligation de GTB \u00e0 proprement parler, mais ils ne sont pas pour autant exempt\u00e9s de toute exigence en mati\u00e8re de <strong>suivi \u00e9nerg\u00e9tique<\/strong>.<\/p>\n<div class=\"row g-3 my-2\">\n<div class=\"col-12 col-md-6 d-flex\">\n<div class=\"card p-3 w-100\" style=\"border:1px solid #e0e0e8;border-radius:12px;box-shadow:0 2px 15px rgba(27,25,69,0.08)\">\n<div style=\"font-size:2.5rem;\">\ud83c\udfed<\/div>\n<div class=\"mt-2 mb-2\" style=\"color:#1B1945;font-weight:600;\">Dans l\u2019industrie<\/div>\n<div class=\"mb-2\">Les <strong>surfaces tertiaires des sites industriels<\/strong> (bureaux, locaux sociaux, laboratoires\u2026) restent soumises aux d\u00e9crets BACS et tertiaire. Les zones de production en sont exclues.<\/div>\n<div class=\"mb-2\">Pour l\u2019ensemble du site, la <strong>loi DDADUE<\/strong> impose depuis 2025 un <strong>audit \u00e9nerg\u00e9tique tous les 4 ans<\/strong> au-del\u00e0 de 2,75 GWh consomm\u00e9s par an, et un <strong>syst\u00e8me de management de l\u2019\u00e9nergie certifi\u00e9 ISO 50001<\/strong> au-del\u00e0 de 23,6 GWh.<\/div>\n<div>Le <strong>sous-comptage par usage<\/strong> (air comprim\u00e9, froid, moteurs, proc\u00e9d\u00e9s\u2026) en est la base. Sa mise en place peut \u00eatre en partie financ\u00e9e par la fiche CEE <strong>IND-UT-134<\/strong>.<\/div>\n<\/div>\n<\/div>\n<div class=\"col-12 col-md-6 d-flex\">\n<div class=\"card p-3 w-100\" style=\"border:1px solid #e0e0e8;border-radius:12px;box-shadow:0 2px 15px rgba(27,25,69,0.08)\">\n<div style=\"font-size:2.5rem;\">\ud83c\udfe0<\/div>\n<div class=\"mt-2 mb-2\" style=\"color:#1B1945;font-weight:600;\">Dans le r\u00e9sidentiel<\/div>\n<div class=\"mb-2\">Les logements ne sont pas concern\u00e9s par le d\u00e9cret BACS : on parle ici de <strong>domotique<\/strong>.<\/div>\n<div class=\"mb-2\">La r\u00e9glementation porte surtout sur la <strong>r\u00e9gulation du chauffage<\/strong>, avec l\u2019obligation d\u2019\u00e9quiper les logements existants de thermostats programmables, report\u00e9e au <strong>1<sup>er<\/sup> janvier 2030<\/strong>.<\/div>\n<div>Dans les <strong>immeubles collectifs<\/strong>, le suivi des consommations des parties communes (\u00e9clairage, ascenseurs, ventilation, chaufferie) reste un levier efficace pour r\u00e9duire les charges.<\/div>\n<\/div>\n<\/div>\n<\/div>\n<h2 id=\"gtb-gtc-comment-les-mettre-en-oeuvre\">GTB \/ GTC : comment les mettre en \u0153uvre ?<\/h2>\n<p>La mise en place d\u2019un syst\u00e8me de gestion technique du b\u00e2timent, ou de gestion technique centralis\u00e9e, n\u00e9cessite de suivre <strong>plusieurs \u00e9tapes cl\u00e9s<\/strong> :<\/p>\n<div class=\"my-3\">\n<div class=\"card p-3 mb-3 d-flex flex-column flex-md-row align-items-start gap-2 gap-md-3\" style=\"border:1px solid #e0e0e8;border-radius:12px;box-shadow:0 2px 15px rgba(27,25,69,0.08)\">\n<div class=\"flex-shrink-0 d-flex align-items-center justify-content-center\" style=\"width:44px;height:44px;border-radius:50%;background-color:#FDC300;color:#1B1945;font-weight:700;\">1<\/div>\n<div>\n<div style=\"color:#1B1945;font-weight:600;\">R\u00e9aliser un audit \u00e9nerg\u00e9tique et technique<\/div>\n<div>Avant tout, il est imp\u00e9ratif d\u2019<strong>analyser le fonctionnement actuel du b\u00e2timent<\/strong>. Quels sont les \u00e9quipements en place ? Quels sont les taux de consommation \u00e9nerg\u00e9tique ? Quelles sont les zones de surconsommation et de d\u00e9perdition d\u2019\u00e9nergie ? Cet \u00e9tat des lieux permet de d\u00e9terminer s\u2019il convient de mettre en place une GTB ou une GTC, d\u2019identifier les <strong>lots techniques \u00e0 int\u00e9grer en priorit\u00e9<\/strong>, et d\u2019\u00e9laborer une <strong>feuille de route structur\u00e9e<\/strong> pour coordonner le projet.<\/div>\n<\/div>\n<\/div>\n<div class=\"card p-3 mb-3 d-flex flex-column flex-md-row align-items-start gap-2 gap-md-3\" style=\"border:1px solid #e0e0e8;border-radius:12px;box-shadow:0 2px 15px rgba(27,25,69,0.08)\">\n<div class=\"flex-shrink-0 d-flex align-items-center justify-content-center\" style=\"width:44px;height:44px;border-radius:50%;background-color:#FDC300;color:#1B1945;font-weight:700;\">2<\/div>\n<div>\n<div style=\"color:#1B1945;font-weight:600;\">Clarifier les objectifs et le p\u00e9rim\u00e8tre d\u2019intervention<\/div>\n<div>Il est crucial de s\u2019interroger sur les <strong>objectifs vis\u00e9s<\/strong> : assurer sa conformit\u00e9 r\u00e9glementaire, am\u00e9liorer le confort des occupants, r\u00e9duire les co\u00fbts\u2026 Il faut \u00e9galement d\u00e9finir le <strong>p\u00e9rim\u00e8tre du projet<\/strong>, c\u2019est-\u00e0-dire les sites et \u00e9quipements concern\u00e9s (un seul b\u00e2timent, un ensemble multi-sites, un seul lot technique\u2026).<\/div>\n<\/div>\n<\/div>\n<div class=\"card p-3 mb-3 d-flex flex-column flex-md-row align-items-start gap-2 gap-md-3\" style=\"border:1px solid #e0e0e8;border-radius:12px;box-shadow:0 2px 15px rgba(27,25,69,0.08)\">\n<div class=\"flex-shrink-0 d-flex align-items-center justify-content-center\" style=\"width:44px;height:44px;border-radius:50%;background-color:#FDC300;color:#1B1945;font-weight:700;\">3<\/div>\n<div class=\"w-100\">\n<div style=\"color:#1B1945;font-weight:600;\">Identifier une solution de mesure adapt\u00e9e<\/div>\n<div>Le <strong>choix du syst\u00e8me de mesure<\/strong> est une \u00e9tape cl\u00e9. La solution envisag\u00e9e doit notamment \u00eatre :<\/div>\n<div class=\"row g-2 my-2\">\n<div class=\"col-12 col-sm-6\">\n<div class=\"p-2 h-100\" style=\"background-color:#f4f4f8;border-radius:12px;\"><strong style=\"color:#1B1945;\">\u2714 Interop\u00e9rable<\/strong><br \/>avec les \u00e9quipements existants<\/div>\n<\/div>\n<div class=\"col-12 col-sm-6\">\n<div class=\"p-2 h-100\" style=\"background-color:#f4f4f8;border-radius:12px;\"><strong style=\"color:#1B1945;\">\u2714 \u00c9volutive<\/strong><br \/>pour ajouter facilement de nouveaux lots techniques<\/div>\n<\/div>\n<div class=\"col-12 col-sm-6\">\n<div class=\"p-2 h-100\" style=\"background-color:#f4f4f8;border-radius:12px;\"><strong style=\"color:#1B1945;\">\u2714 Simple d\u2019utilisation<\/strong><br \/>avec une interface claire, ergonomique et intuitive<\/div>\n<\/div>\n<div class=\"col-12 col-sm-6\">\n<div class=\"p-2 h-100\" style=\"background-color:#f4f4f8;border-radius:12px;\"><strong style=\"color:#1B1945;\">\u2714 Compatible avec une GTB de classe A ou B<\/strong><br \/>selon la norme NF EN ISO 52120-1, recommand\u00e9e par l\u2019ADEME et requise pour les primes CEE<\/div>\n<\/div>\n<\/div>\n<div class=\"mb-2\">Une centrale de mesure multi-circuits comme la <a href=\"https:\/\/lettel.com\/fr\/centrale-mesure-map6\/\" style=\"color:#1B1945;\"><strong>MAP6<\/strong><\/a> de Lettel permet par exemple de suivre jusqu\u2019\u00e0 8 circuits triphas\u00e9s ou 24 monophas\u00e9s depuis un seul appareil modulaire, tandis que les <a href=\"https:\/\/lettel.com\/fr\/categories-produits\/mesure-electrique\/compteurs-electrique\/\" style=\"color:#1B1945;\"><strong>compteurs \u00e9lectriques MCX<\/strong><\/a> assurent le sous-comptage d\u2019un d\u00e9part ou d\u2019un lot technique.<\/div>\n<div>Il faudra ensuite assurer l\u2019<strong>installation des capteurs et actionneurs<\/strong> dans le b\u00e2timent, sur les lots techniques concern\u00e9s.<\/div>\n<\/div>\n<\/div>\n<div class=\"card p-3 mb-3 d-flex flex-column flex-md-row align-items-start gap-2 gap-md-3\" style=\"border:1px solid #e0e0e8;border-radius:12px;box-shadow:0 2px 15px rgba(27,25,69,0.08)\">\n<div class=\"flex-shrink-0 d-flex align-items-center justify-content-center\" style=\"width:44px;height:44px;border-radius:50%;background-color:#FDC300;color:#1B1945;font-weight:700;\">4<\/div>\n<div>\n<div style=\"color:#1B1945;font-weight:600;\">Param\u00e9trer la solution<\/div>\n<div>La solution doit \u00eatre configur\u00e9e avec des <strong>sc\u00e9narios de fonctionnement adapt\u00e9s aux besoins des occupants<\/strong> (plages horaires, consignes de temp\u00e9rature, seuils d\u2019alerte\u2026). Des tests sont ensuite r\u00e9alis\u00e9s pour s\u2019assurer de la <strong>bonne transmission des donn\u00e9es<\/strong>.<\/div>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"my-4 overflow-hidden\" style=\"background-color:#1B1945;color:#fff;border-radius:12px;border-left:6px solid #FDC300;box-shadow:0 2px 15px rgba(27,25,69,0.15);\">\n<div class=\"p-4\">\n<div class=\"row g-3 align-items-center mb-3\">\n<div class=\"col-12 col-md-7\">\n<div class=\"mb-2\" style=\"color:#FDC300;font-weight:700;text-transform:uppercase;letter-spacing:1px;\">Financer sa GTB<\/div>\n<h3 style=\"font-weight:700;color:#fff !important;margin:0 !important;padding:0 !important;\" style=\"font-weight:700;color:#fff !important;margin:0 !important;padding:0 !important;\" id=\"les-primes-cee-la-fiche-bat-th-116\">Les primes CEE : la fiche BAT-TH-116<\/h3>\n<div class=\"mt-3\" style=\"line-height:1.7;\">L\u2019installation ou l\u2019am\u00e9lioration d\u2019une GTB peut \u00eatre en partie financ\u00e9e par les <strong style=\"color:#FDC300;\">certificats d\u2019\u00e9conomies d\u2019\u00e9nergie (CEE)<\/strong>. Pour \u00eatre \u00e9ligible, l\u2019op\u00e9ration doit remplir plusieurs conditions, d\u00e9taill\u00e9es dans la <button onclick=\"window.open(decodeURIComponent(atob('aHR0cHM6Ly93d3cuZWNvbG9naWUuZ291di5mci9zaXRlcy9kZWZhdWx0L2ZpbGVzL2RvY3VtZW50cy9CQVQtVEgtMTE2JTIwdiUyMEEzOC0zJTIwJUMzJUEwJTIwY29tcHRlciUyMGR1JTIwMDEtMTEtMjAyMS5wZGY=')), '_blank'); return false;\">fiche officielle BAT-TH-116<\/button> :<\/div>\n<\/div>\n<div class=\"col-12 col-md-5 text-center\"><img decoding=\"async\" src=\"https:\/\/lettel.com\/wp-content\/uploads\/2026\/09\/prime_cee.png\" alt=\"Les certificats d'\u00e9conomies d'\u00e9nergie (CEE)\" loading=\"lazy\" style=\"width:100%;max-width:360px;height:auto;display:inline-block;border-radius:10px;\"><\/div>\n<\/div>\n<div class=\"row g-2 mb-3\">\n<div class=\"col-12 col-sm-6 col-lg-3\">\n<div class=\"p-3 h-100\" style=\"background-color:#f4f4f8;color:#1B1945;border-radius:10px;line-height:1.5;\">\n<div class=\"mb-2\" style=\"font-size:2.5rem;line-height:1;\">\ud83c\udfe2<\/div>\n<p><strong style=\"color:#1B1945;\">B\u00e2timent tertiaire<\/strong><br \/>existant depuis plus de 2 ans<\/div>\n<\/div>\n<div class=\"col-12 col-sm-6 col-lg-3\">\n<div class=\"p-3 h-100\" style=\"background-color:#f4f4f8;color:#1B1945;border-radius:10px;line-height:1.5;\">\n<div class=\"mb-2\" style=\"font-size:2.5rem;line-height:1;\">\ud83c\udfaf<\/div>\n<p><strong style=\"color:#1B1945;\">GTB de classe A ou B<\/strong><br \/>selon la norme NF EN ISO 52120-1<\/div>\n<\/div>\n<div class=\"col-12 col-sm-6 col-lg-3\">\n<div class=\"p-3 h-100\" style=\"background-color:#f4f4f8;color:#1B1945;border-radius:10px;line-height:1.5;\">\n<div class=\"mb-2\" style=\"font-size:2.5rem;line-height:1;\">\ud83c\udf21\ufe0f<\/div>\n<p><strong style=\"color:#1B1945;\">Pilotage du chauffage<\/strong><br \/>au minimum<\/div>\n<\/div>\n<div class=\"col-12 col-sm-6 col-lg-3\">\n<div class=\"p-3 h-100\" style=\"background-color:#f4f4f8;color:#1B1945;border-radius:10px;line-height:1.5;\">\n<div class=\"mb-2\" style=\"font-size:2.5rem;line-height:1;\">\ud83d\udcc5<\/div>\n<p><strong style=\"color:#1B1945;\">Op\u00e9ration engag\u00e9e<\/strong><br \/>avant le 1<sup>er<\/sup> janvier 2030<\/div>\n<\/div>\n<\/div>\n<div class=\"mb-3\" style=\"line-height:1.7;\">Le montant de la prime d\u00e9pend de la <strong style=\"color:#FDC300;\">classe de la GTB<\/strong>, du secteur d\u2019activit\u00e9, des usages pilot\u00e9s, de la zone climatique et de la surface g\u00e9r\u00e9e.<\/div>\n<div class=\"mb-3 p-3\" style=\"background-color:#f4f4f8;color:#1B1945;border-radius:10px;line-height:1.6;\"><strong style=\"color:#1B1945;\">\u00c0 noter :<\/strong> une GTB de classe C suffit pour le d\u00e9cret BACS, mais seules les <strong style=\"color:#1B1945;\">classes A et B<\/strong> ouvrent droit \u00e0 la prime. Viser plus haut, c\u2019est mieux financer son projet.<\/div>\n<div style=\"line-height:1.7;\">Le <strong style=\"color:#FDC300;\">comptage des consommations<\/strong> est au c\u0153ur d\u2019une GTB performante : les <a href=\"https:\/\/lettel.com\/fr\/categories-produits\/mesure-electrique\/centrales-de-mesure\/\" style=\"color:#FDC300;\">centrales de mesure<\/a> et <a href=\"https:\/\/lettel.com\/fr\/categories-produits\/mesure-electrique\/compteurs-electrique\/\" style=\"color:#FDC300;\">compteurs communicants Lettel<\/a> remontent les donn\u00e9es de chaque d\u00e9part vers la supervision et s\u2019int\u00e8grent ainsi dans une installation \u00e9ligible.<\/div>\n<\/div>\n<\/div>\n<h2 id=\"lettel-vous-accompagne-dans-la-mise-en-place-de-votre-gtb-gtc\">Lettel vous accompagne dans la mise en place de votre GTB \/ GTC<\/h2>\n<div class=\"row align-items-center\">\n<div class=\"col-lg-6\">\nFabricant d\u2019<strong>appareils de mesure \u00e9lectrique<\/strong>, Lettel con\u00e7oit des <strong>\u00e9quipements communicants<\/strong> qui alimentent les syst\u00e8mes de <strong>GTB et de GTC<\/strong> : centrales de mesure comme la <a href=\"https:\/\/lettel.com\/fr\/centrale-mesure-map6\/\" style=\"color:#1B1945;\"><strong>MAP6-8RJ<\/strong><\/a> et compteurs d\u2019\u00e9nergie <a href=\"https:\/\/lettel.com\/fr\/categories-produits\/mesure-electrique\/compteurs-electrique\/\" style=\"color:#1B1945;\"><strong>MCX<\/strong><\/a>. Ils s\u2019int\u00e8grent \u00e0 l\u2019<a href=\"https:\/\/lettel.com\/fr\/categories-produits\/mesure-electrique\/mesure-multi-departs\/\" style=\"color:#1B1945;\"><strong>\u00e9cosyst\u00e8me Enerclip<\/strong><\/a>, qui regroupe des solutions de <strong>mesure multi-d\u00e9parts<\/strong> ainsi que les <a href=\"https:\/\/lettel.com\/fr\/categories-produits\/mesure-electrique\/transformateurs-courant\/\" style=\"color:#1B1945;\">transformateurs de courant<\/a> et <a href=\"https:\/\/lettel.com\/fr\/produit\/cordon-rj12-msc-1rj\/\" style=\"color:#1B1945;\">accessoires<\/a> n\u00e9cessaires \u00e0 leur raccordement.<\/p>\n<p>Ces solutions permettent de <strong>mesurer, surveiller et analyser les consommations \u00e9lectriques<\/strong>, mais aussi d\u2019exploiter les donn\u00e9es collect\u00e9es pour <strong>d\u00e9clencher des actions sur seuils<\/strong>, <strong>g\u00e9rer des alarmes<\/strong> et faire remonter l\u2019\u00e9tat des \u00e9quipements. Selon les configurations, elles contribuent ainsi au <strong>pilotage et \u00e0 la protection des circuits \u00e9lectriques<\/strong>, avec une centralisation des donn\u00e9es sur un \u00e9cran et un <strong>logiciel d\u00e9di\u00e9<\/strong>.\n    <\/div>\n<div class=\"col-lg-5 offset-lg-1 mt-4 mt-lg-0\">\n      <img decoding=\"async\" class=\"img-fluid\" style=\"border-radius:12px;object-fit:cover;\" src=\"https:\/\/lettel.com\/wp-content\/uploads\/2026\/09\/parametrage-map6-8rj.jpg\" alt=\"Centrale de mesure Lettel int\u00e9gr\u00e9e \u00e0 un syst\u00e8me de GTB \/ GTC\" >\n    <\/div>\n<\/p>\n<\/div>\n<p>Avec notre solution <a href=\"https:\/\/lettel.com\/fr\/solution-enerclip\/\" style=\"color:#1B1945;\"><strong>Enerclip<\/strong><\/a>, vous b\u00e9n\u00e9ficiez :<\/p>\n<div class=\"row g-3 my-2 justify-content-center\">\n<div class=\"col-12 col-sm-6 col-lg-4 d-flex\">\n<div class=\"card p-3 w-100\" style=\"border:1px solid #e0e0e8;border-radius:12px;box-shadow:0 2px 15px rgba(27,25,69,0.08)\">\n<div style=\"font-size:2.5rem;\">\ud83c\udfaf<\/div>\n<div class=\"mt-2 mb-2\" style=\"color:#1B1945;font-weight:600;\">Mesures de haute pr\u00e9cision<\/div>\n<div>Un relev\u00e9 \u00e9lectrique fiable, conforme \u00e0 la <strong>classe 0,5S<\/strong>.<\/div>\n<\/div>\n<\/div>\n<div class=\"col-12 col-sm-6 col-lg-4 d-flex\">\n<div class=\"card p-3 w-100\" style=\"border:1px solid #e0e0e8;border-radius:12px;box-shadow:0 2px 15px rgba(27,25,69,0.08)\">\n<div style=\"font-size:2.5rem;\">\ud83d\udcca<\/div>\n<div class=\"mt-2 mb-2\" style=\"color:#1B1945;font-weight:600;\">Analyse fine de la qualit\u00e9 du courant<\/div>\n<div>D\u00e9tection et mesure des perturbations harmoniques <strong>jusqu\u2019au rang 63<\/strong>, pour un suivi complet de la stabilit\u00e9 \u00e9nerg\u00e9tique.<\/div>\n<\/div>\n<\/div>\n<div class=\"col-12 col-sm-6 col-lg-4 d-flex\">\n<div class=\"card p-3 w-100\" style=\"border:1px solid #e0e0e8;border-radius:12px;box-shadow:0 2px 15px rgba(27,25,69,0.08)\">\n<div style=\"font-size:2.5rem;\">\ud83d\udd0c<\/div>\n<div class=\"mt-2 mb-2\" style=\"color:#1B1945;font-weight:600;\">Installation simple et rapide<\/div>\n<div>Conception modulaire et compacte, raccordement via <a href=\"https:\/\/lettel.com\/fr\/produit\/cordon-rj12-msc-1rj\/\" style=\"color:#1B1945;\"><strong>connectique RJ12<\/strong><\/a>, d\u00e9ploiement <strong>sans coupure des circuits<\/strong> gr\u00e2ce aux <a href=\"https:\/\/lettel.com\/fr\/produit\/transformateur-courant-msc-tco\/\" style=\"color:#1B1945;\">TC ouvrants<\/a>, pour pr\u00e9server la continuit\u00e9 d\u2019exploitation.<\/div>\n<\/div>\n<\/div>\n<div class=\"col-12 col-sm-6 col-lg-4 d-flex\">\n<div class=\"card p-3 w-100\" style=\"border:1px solid #e0e0e8;border-radius:12px;box-shadow:0 2px 15px rgba(27,25,69,0.08)\">\n<div style=\"font-size:2.5rem;\">\ud83d\udccf<\/div>\n<div class=\"mt-2 mb-2\" style=\"color:#1B1945;font-weight:600;\">Encombrement minimal<\/div>\n<div>Des dimensions r\u00e9duites pour une int\u00e9gration fluide dans tout type d\u2019armoire \u00e9lectrique, <strong>m\u00eame dans les espaces restreints<\/strong>, notamment avec les <a href=\"https:\/\/lettel.com\/fr\/produit\/boucle-rogowski-msc-tcr\/\" style=\"color:#1B1945;\">boucles Rogowski<\/a>.<\/div>\n<\/div>\n<\/div>\n<div class=\"col-12 col-sm-6 col-lg-4 d-flex\">\n<div class=\"card p-3 w-100\" style=\"border:1px solid #e0e0e8;border-radius:12px;box-shadow:0 2px 15px rgba(27,25,69,0.08)\">\n<div style=\"font-size:2.5rem;\">\ud83d\udda5\ufe0f<\/div>\n<div class=\"mt-2 mb-2\" style=\"color:#1B1945;font-weight:600;\">Visualisation claire et intuitive<\/div>\n<div>Un <a href=\"https:\/\/lettel.com\/fr\/produit\/afficheur-enerclip-msc-de\/\" style=\"color:#1B1945;\"><strong>\u00e9cran encastrable<\/strong><\/a> et un <strong>logiciel de supervision d\u00e9di\u00e9<\/strong> : lecture des donn\u00e9es sous forme de courbes, graphiques ou vecteurs.<\/div>\n<\/div>\n<\/div>\n<div class=\"col-12 col-sm-6 col-lg-4 d-flex\">\n<div class=\"card p-3 w-100\" style=\"border:1px solid #e0e0e8;border-radius:12px;box-shadow:0 2px 15px rgba(27,25,69,0.08)\">\n<div style=\"font-size:2.5rem;\">\ud83c\udf9b\ufe0f<\/div>\n<div class=\"mt-2 mb-2\" style=\"color:#1B1945;font-weight:600;\">Pilotage flexible et automatis\u00e9<\/div>\n<div>Des <strong>sorties relais<\/strong> pour contr\u00f4ler les circuits \u00e0 distance ou selon des seuils configur\u00e9s.<\/div>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"p-4 p-md-5 my-4 rounded\" style=\"background-color:#1B1945;color:#fff;\">\n<div class=\"d-flex flex-column flex-md-row align-items-center gap-2\"><img decoding=\"async\" src=\"https:\/\/lettel.com\/wp-content\/uploads\/2021\/11\/favicon.png\" alt=\"Lettel\" class=\"flex-shrink-0\" style=\"width:70px;height:auto;\"><\/p>\n<div style=\"font-weight:500;\">Vous souhaitez mettre en place une GTB ou une GTC ? Contactez-nous pour b\u00e9n\u00e9ficier d\u2019un accompagnement technique et trouver la solution de mesure la plus adapt\u00e9e.<\/div>\n<\/div>\n<div class=\"d-flex justify-content-center w-100 mt-4\"><a href=\"https:\/\/lettel.com\/fr\/contact\/\" class=\"btn btn-c1 text-uppercase\">Contactez-nous<\/a><\/div>\n<\/div>\n                                    <\/div>\r\n\r\n                                    \r\n<div class=\"c-socials-share\">\r\n  <p class=\"c-ttl\">Partager ou r\u00e9sumer l&rsquo;article&nbsp;:<\/p>\r\n  <ul class=\"c-list\">\r\n    <li>\r\n      <a href=\"https:\/\/www.linkedin.com\/shareArticle?mini=true&#038;url=https:\/\/lettel.com\/fr\/ressources\/gtb-et-gtc-de-quoi-sagit-il-et-pourquoi-les-mettre-en-place\/&#038;title=GTB et GTC : de quoi s\u2019agit-il et pourquoi les mettre en place ?\" target=\"_blank\" onclick=\"javascript:window.open(this.href, '', 'menubar=no,toolbar=no,resizable=yes,scrollbars=yes,height=600,width=600');return false;\" 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<\/li>\r\n    <li>\r\n      <a href=\"https:\/\/claude.ai\/new?q=Peux-tu%20me%20faire%20un%20r%C3%A9sum%C3%A9%20de%20l%27article%20https%3A%2F%2Flettel.com%2Ffr%2Fressources%2Fgtb-et-gtc-de-quoi-sagit-il-et-pourquoi-les-mettre-en-place%2F%20en%2050%20mots%2C%20en%20pr%C3%A9cisant%20les%20%C3%A9l%C3%A9ments%20cl%C3%A9s%20%C3%A0%20retenir%20%3F\" target=\"_blank\" rel=\"noopener\" title=\"Claude\">\r\n        <img decoding=\"async\" class=\"ico\" src=\"https:\/\/lettel.com\/wp-content\/themes\/lettel\/assets\/dist\/svg\/ico-claude-blue.svg\" alt=\"Claude\">\r\n      <\/a>\r\n    <\/li>\r\n\r\n      <\/ul>\r\n<\/div>\r\n\t\t\t\t\t<!-- ===== BLOC AUTEUR ===== -->\r\n                                            <div class=\"author-block\">\r\n                            <div class=\"author-left\">\r\n                                <p class=\"author-title\">Auteur de l\u2019article<\/p>\r\n\r\n                                                                    <img decoding=\"async\" src=\"https:\/\/lettel.com\/wp-content\/uploads\/2026\/05\/jun.jpg\" class=\"author-avatar\" alt=\"Avatar\">\r\n                                \r\n                                <p class=\"author-name\">\r\n                                    Jun Sun                                <\/p>\r\n\r\n                                                                    <p class=\"author-activity\">\r\n                                        Ing\u00e9nieur d\u00e9veloppement Lettel                                    <\/p>\r\n                                                            <\/div>\r\n\r\n                            <div class=\"author-right\">\r\n                                <div class=\"author-bio editor\">\r\n                                    <p>Je travaille depuis pr\u00e8s de 10 ans dans le domaine de l&rsquo;\u00e9lectricit\u00e9, avec une expertise centr\u00e9e sur la pr\u00e9cision des mesures, la fiabilit\u00e9 des \u00e9quipements et les applications terrain.<\/p>\n<p>Domaines d\u2019expertise :<\/p>\n<ul>\n<li>Mesure et instrumentation \u00e9lectrique<\/li>\n<li>D\u00e9veloppement et optimisation de produits \u00e9lectriques<\/li>\n<li>Contr\u00f4le de performance et fiabilit\u00e9 des \u00e9quipements<\/li>\n<li>Innovation et am\u00e9lioration continue des solutions \u00e9lectriques<\/li>\n<\/ul>\n                                <\/div>\r\n                            <\/div>\r\n                        <\/div>\r\n                    \t\t\t\t\t<!-- ===== FIN BLOC AUTEUR ===== -->\r\n\r\n                            <\/div>\r\n\r\n            <aside class=\"col-lg-3 offset-lg-1 d-none d-lg-block \">\r\n                <div class=\"c-aside-wrp\">\r\n                    \r\n<div class=\"c-socials-share\">\r\n  <p class=\"c-ttl\">Partager ou r\u00e9sumer l&rsquo;article&nbsp;:<\/p>\r\n  <ul class=\"c-list\">\r\n    <li>\r\n      <a href=\"https:\/\/www.linkedin.com\/shareArticle?mini=true&#038;url=https:\/\/lettel.com\/fr\/ressources\/gtb-et-gtc-de-quoi-sagit-il-et-pourquoi-les-mettre-en-place\/&#038;title=GTB et GTC : de quoi s\u2019agit-il et pourquoi les mettre en place ?\" target=\"_blank\" onclick=\"javascript:window.open(this.href, '', 'menubar=no,toolbar=no,resizable=yes,scrollbars=yes,height=600,width=600');return false;\" title=\"Linkedin\">\r\n        <i class=\"bi bi-linkedin\"><\/i>\r\n      <\/a>\r\n    <\/li>\r\n    <li>\r\n      <a href=\"mailto:?subject=GTB et GTC : de quoi s\u2019agit-il et pourquoi les mettre en place ?&amp;body=https:\/\/lettel.com\/fr\/ressources\/gtb-et-gtc-de-quoi-sagit-il-et-pourquoi-les-mettre-en-place\/\" title=\"Email\">\r\n        <i class=\"bi bi-envelope-fill\"><\/i>\r\n      <\/a>\r\n    <\/li>\r\n    <li>\r\n      <a href=\"https:\/\/chatgpt.com\/?q=Peux-tu%20me%20faire%20un%20r%C3%A9sum%C3%A9%20de%20l%27article%20https%3A%2F%2Flettel.com%2Ffr%2Fressources%2Fgtb-et-gtc-de-quoi-sagit-il-et-pourquoi-les-mettre-en-place%2F%20en%2050%20mots%2C%20en%20pr%C3%A9cisant%20les%20%C3%A9l%C3%A9ments%20cl%C3%A9s%20%C3%A0%20retenir%20%3F\" target=\"_blank\" rel=\"noopener\" title=\"ChatGPT\">\r\n        <img decoding=\"async\" class=\"ico\" src=\"https:\/\/lettel.com\/wp-content\/themes\/lettel\/assets\/dist\/svg\/ico-chatgpt-blue.svg\" alt=\"ChatGPT\">\r\n      <\/a>\r\n    <\/li>\r\n    <li>\r\n      <a href=\"https:\/\/claude.ai\/new?q=Peux-tu%20me%20faire%20un%20r%C3%A9sum%C3%A9%20de%20l%27article%20https%3A%2F%2Flettel.com%2Ffr%2Fressources%2Fgtb-et-gtc-de-quoi-sagit-il-et-pourquoi-les-mettre-en-place%2F%20en%2050%20mots%2C%20en%20pr%C3%A9cisant%20les%20%C3%A9l%C3%A9ments%20cl%C3%A9s%20%C3%A0%20retenir%20%3F\" target=\"_blank\" rel=\"noopener\" title=\"Claude\">\r\n        <img decoding=\"async\" class=\"ico\" src=\"https:\/\/lettel.com\/wp-content\/themes\/lettel\/assets\/dist\/svg\/ico-claude-blue.svg\" alt=\"Claude\">\r\n      <\/a>\r\n    <\/li>\r\n\r\n      <\/ul>\r\n<\/div>                    <div class=\"c-nav\">\r\n                        <p class=\"c-nav_ttl\">Sommaire<\/p>\r\n                        <ul class='table-content'><li class='table-content_item-lvl-2'><a class='table-content_link' href='#gtb-et-gtc-de-quoi-sagit-il'>GTB et GTC : de quoi s\u2019agit-il ?<\/a><ul class='table-content'><li class='table-content_item-lvl-3'><a class='table-content_link' href='#la-gtb-definition-et-fonctionnement'>La GTB : d\u00e9finition et fonctionnement<\/a><li><a class='table-content_link' href='#la-gtc-definition-et-fonctionnement'>La GTC : d\u00e9finition et fonctionnement<\/a><li><a class='table-content_link' href='#gtb-et-gtc-quelles-differences'>GTB et GTC : quelles diff\u00e9rences ?<\/a><\/ul><li class='table-content_item-lvl-2'><a class='table-content_link' href='#pourquoi-mettre-en-place-une-gtb-gtc'>Pourquoi mettre en place une GTB \/ GTC ?<\/a><li><a class='table-content_link' href='#la-mise-en-place-dune-gtb-gtc-est-elle-obligatoire'>La mise en place d\u2019une GTB \/ GTC est-elle obligatoire ?<\/a><ul class='table-content'><li class='table-content_item-lvl-3'><a class='table-content_link' href='#le-decret-eco-energie-tertiaire'>Le d\u00e9cret \u00c9co \u00c9nergie Tertiaire<\/a><li><a class='table-content_link' href='#le-decret-bacs'>Le d\u00e9cret BACS<\/a><li><a class='table-content_link' href='#dans-lindustrie-ou-le-residentiel'>Dans l\u2019industrie ou le r\u00e9sidentiel<\/a><\/ul><li class='table-content_item-lvl-2'><a class='table-content_link' href='#gtb-gtc-comment-les-mettre-en-oeuvre'>GTB \/ GTC : comment les mettre en \u0153uvre ?<\/a><li><a class='table-content_link' href='#lettel-vous-accompagne-dans-la-mise-en-place-de-votre-gtb-gtc'>Lettel vous accompagne dans la mise en place de votre GTB \/ GTC<\/a><\/li><\/ul>                    <\/div>\r\n                <\/div>\r\n            <\/aside>\r\n        <\/div>\r\n\r\n    <\/div>\r\n<\/section>\r\n\r\n\n\n\r\n\r\n<section class=\"blc-related-posts bg-cg spc-s3\">\r\n\r\n\t\t<header class=\"c-heading\">\r\n\t\t\t<div class=\"container\">\r\n\t\t\t\t<h2 class=\"c-ttl\" class=\"c-ttl\" id=\"les-cahiers-techniques-lettel\">Les cahiers techniques Lettel<\/h2>\r\n\t\t\t<\/div>\r\n\t\t<\/header>\r\n\r\n\t\t<div class=\"container\">\r\n\t\t\t<div class=\"swiper\" swiper-type=\"3\">\r\n\t\t\t\t<div class=\"swiper-wrapper\">\r\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<article class=\"swiper-slide\" id='9727'>\r\n\t\t\t\t\t\t\t\r\n<a class=\"c-card-post\" href='https:\/\/lettel.com\/fr\/ressources\/tore-rogowski\/'>\r\n\t<figure class=\"media-wrp__4x3\">\r\n\t\t<img decoding=\"async\" class=\"media\" alt=\"boucle de courant rogowski sur cable\" src=\"https:\/\/lettel.com\/wp-content\/uploads\/2025\/02\/boucle-rogowski-sur-cable.jpg\" srcset=\"https:\/\/lettel.com\/wp-content\/uploads\/2025\/02\/boucle-rogowski-sur-cable-300x225.jpg 300w, https:\/\/lettel.com\/wp-content\/uploads\/2025\/02\/boucle-rogowski-sur-cable-768x576.jpg 768w, https:\/\/lettel.com\/wp-content\/uploads\/2025\/02\/boucle-rogowski-sur-cable-600x450.jpg 600w, https:\/\/lettel.com\/wp-content\/uploads\/2025\/02\/boucle-rogowski-sur-cable.jpg 1000w\" sizes=\"(min-width: 992px) 397px, (min-width: 1200px) 480px, (min-width: 1400px) 560px, (min-width: 1600px) 640px, 100vw\">\r\n\t<\/figure>\r\n\t<div class=\"c-txt\">\r\n\t\t\t<p class=\"c-ttl c-ttl__md ttl-brd\">Tout savoir sur le capteur de courant type Rogowski<\/p>\r\n\t\t\t<h3 class=\"c-desc\" class=\"c-desc\" id=\"definition-fonctionnement-et-avantages\">D\u00e9finition, fonctionnement et avantages\u00a0\u00a0<\/h3>\r\n\t\t\t<p class=\"c-date\">Publi\u00e9 le 4 f\u00e9vrier 2025<\/p>\r\n\t\t\t<button class=\"c-link\">En savoir plus<\/button>\r\n\t<\/div>\r\n<\/a>\t\t\t\t\t\t<\/article>\r\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<article class=\"swiper-slide\" id='58842'>\r\n\t\t\t\t\t\t\t\r\n<a class=\"c-card-post\" href='https:\/\/lettel.com\/fr\/ressources\/comment-installer-un-sous-comptage-electrique-dans-un-immeuble-residentiel\/'>\r\n\t<figure class=\"media-wrp__4x3\">\r\n\t\t<img decoding=\"async\" class=\"media\" alt=\"Sous comptage \u00e9lectrique dans un immeuble r\u00e9sidentiel\" src=\"https:\/\/lettel.com\/wp-content\/uploads\/2026\/07\/compteur-residentiel.jpg\" srcset=\"https:\/\/lettel.com\/wp-content\/uploads\/2026\/07\/compteur-residentiel-300x200.jpg 300w, https:\/\/lettel.com\/wp-content\/uploads\/2026\/07\/compteur-residentiel-768x512.jpg 768w, https:\/\/lettel.com\/wp-content\/uploads\/2026\/07\/compteur-residentiel-600x400.jpg 600w, https:\/\/lettel.com\/wp-content\/uploads\/2026\/07\/compteur-residentiel.jpg 1000w\" sizes=\"(min-width: 992px) 397px, (min-width: 1200px) 480px, (min-width: 1400px) 560px, (min-width: 1600px) 640px, 100vw\">\r\n\t<\/figure>\r\n\t<div class=\"c-txt\">\r\n\t\t\t<p class=\"c-ttl c-ttl__md ttl-brd\">Comment installer un sous-comptage \u00e9lectrique dans un immeuble r\u00e9sidentiel ?<\/p>\r\n\t\t\t<h3 class=\"c-desc\" class=\"c-desc\" id=\"guide-dinstallation-pas-a-pas\">Guide d&rsquo;installation pas \u00e0 pas<\/h3>\r\n\t\t\t<p class=\"c-date\">Publi\u00e9 le 30 juillet 2026<\/p>\r\n\t\t\t<button class=\"c-link\">En savoir plus<\/button>\r\n\t<\/div>\r\n<\/a>\t\t\t\t\t\t<\/article>\r\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<article class=\"swiper-slide\" id='2843'>\r\n\t\t\t\t\t\t\t\r\n<a class=\"c-card-post\" href='https:\/\/lettel.com\/fr\/ressources\/certification-mid\/'>\r\n\t<figure class=\"media-wrp__4x3\">\r\n\t\t<img decoding=\"async\" class=\"media\" alt=\"agr\u00e9ment MID\" src=\"https:\/\/lettel.com\/wp-content\/uploads\/2026\/02\/mid-cahier.jpg\" srcset=\"https:\/\/lettel.com\/wp-content\/uploads\/2026\/02\/mid-cahier-300x200.jpg 300w, https:\/\/lettel.com\/wp-content\/uploads\/2026\/02\/mid-cahier-1024x683.jpg 1024w, https:\/\/lettel.com\/wp-content\/uploads\/2026\/02\/mid-cahier-768x512.jpg 768w, https:\/\/lettel.com\/wp-content\/uploads\/2026\/02\/mid-cahier-600x400.jpg 600w, https:\/\/lettel.com\/wp-content\/uploads\/2026\/02\/mid-cahier.jpg 1200w\" sizes=\"(min-width: 992px) 397px, (min-width: 1200px) 480px, (min-width: 1400px) 560px, (min-width: 1600px) 640px, 100vw\">\r\n\t<\/figure>\r\n\t<div class=\"c-txt\">\r\n\t\t\t<p class=\"c-ttl c-ttl__md ttl-brd\">Certification MID : signification, norme et directive<\/p>\r\n\t\t\t<h3 class=\"c-desc\" class=\"c-desc\" id=\"certification-europeenne-permettant-de-refacturer-lelectricite\">Certification europ\u00e9enne permettant de refacturer l&rsquo;\u00e9lectricit\u00e9<\/h3>\r\n\t\t\t<p class=\"c-date\">Publi\u00e9 le 30 janvier 2022<\/p>\r\n\t\t\t<button class=\"c-link\">En savoir plus<\/button>\r\n\t<\/div>\r\n<\/a>\t\t\t\t\t\t<\/article>\r\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<article class=\"swiper-slide\" id='59014'>\r\n\t\t\t\t\t\t\t\r\n<a class=\"c-card-post\" href='https:\/\/lettel.com\/fr\/ressources\/iso-50001-mesure-consommation-energie-industrie\/'>\r\n\t<figure class=\"media-wrp__4x3\">\r\n\t\t<img decoding=\"async\" class=\"media\" alt=\"Op\u00e9rateur usinant une pi\u00e8ce dans une usine industrielle\" src=\"https:\/\/lettel.com\/wp-content\/uploads\/2026\/08\/iso500001_industrie.jpg\" srcset=\"https:\/\/lettel.com\/wp-content\/uploads\/2026\/08\/iso500001_industrie-300x250.jpg 300w, https:\/\/lettel.com\/wp-content\/uploads\/2026\/08\/iso500001_industrie-768x641.jpg 768w, https:\/\/lettel.com\/wp-content\/uploads\/2026\/08\/iso500001_industrie-600x501.jpg 600w, https:\/\/lettel.com\/wp-content\/uploads\/2026\/08\/iso500001_industrie.jpg 799w\" sizes=\"(min-width: 992px) 397px, (min-width: 1200px) 480px, (min-width: 1400px) 560px, (min-width: 1600px) 640px, 100vw\">\r\n\t<\/figure>\r\n\t<div class=\"c-txt\">\r\n\t\t\t<p class=\"c-ttl c-ttl__md ttl-brd\">ISO 50001 : mesurer la consommation et la qualit\u00e9 de l&rsquo;\u00e9nergie dans l&rsquo;industrie<\/p>\r\n\t\t\t<h3 class=\"c-desc\" class=\"c-desc\" id=\"norme-solutions-et-pilotage-energetique\">Norme, solutions et pilotage \u00e9nerg\u00e9tique<\/h3>\r\n\t\t\t<p class=\"c-date\">Publi\u00e9 le 18 ao\u00fbt 2026<\/p>\r\n\t\t\t<button class=\"c-link\">En savoir plus<\/button>\r\n\t<\/div>\r\n<\/a>\t\t\t\t\t\t<\/article>\r\n\t\t\t\t\t\t\t\t\t\r\n\t\t\t\t<\/div>\r\n\t\t\t\t<div class=\"b-pagi swiper-pagination\"><\/div>\r\n\t\t\t<\/div>\r\n\t\t\t<div class=\"container container-navi\">\r\n\t\t\t\t<div class=\"swiper-button-prev\"><\/div>\r\n\t\t\t\t<div class=\"swiper-button-next\"><\/div>\r\n\t\t\t<\/div>\r\n\t\t<\/div>\r\n\r\n<\/section>\r\n\r\n\n\n\r\n\r\n<section class=\"blc-banner spc-s3 bg-c4\"> \r\n\t<div class=\"container tpl1\">\r\n\r\n\t\t<div class=\"row\">\r\n\t\t\t<div class=\"b-txt col-lg-6\">\r\n\t\t\t\t<h2 class=\"b-ttl\" data-aos=\"fade-up\" class=\"b-ttl\" data-aos=\"fade-up\" id=\"vous-souhaitez-etre-conseille\">Vous souhaitez \u00eatre conseill\u00e9&nbsp;?<\/h2>\t\t\t\t\t\t\t\t<a class=\"btn btn-c1\" data-aos=\"fade-up\" data-aos-delay=\"150\" href=\"https:\/\/lettel.com\/fr\/contact\/\">Contactez-nous<\/a>\t\t\t<\/div>\r\n\t\t\t\t\t\t\t\t<\/div>\r\n\r\n\t<\/div>\r\n<\/section>\r\n\r\n","protected":false},"excerpt":{"rendered":"D\u00e9finitions, obligations et mise en \u0153uvre","protected":false},"author":12,"featured_media":58532,"template":"","class_list":["post-18740","ressources","type-ressources","status-publish","has-post-thumbnail","hentry","ress-format-cahier-technique"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>GTB et GTC : de quoi s\u2019agit-il et pourquoi les mettre en place ?<\/title>\n<meta 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