Daikin Altherma C Gas ECH₂O

Daikin Altherma C Gas ECH₂O

The wall mounted unit combines efficient gas condensing technology with a thermal store and storage tank to provide heating and hot water for your home. 

GCU compact easy and affordable installation

Easy and affordable installation

The Daikin Altherma C Gas ECH₂O combines heating and hot water storage to create one compact unit. Equipped with Intelligent Storage Management (ISM) and Smart Start Function, this unit continually optimises its operation to attain more energy efficiency and high performance in heating and DHW. This system is ideal for replacing old gas boilers but can also cover the demands of low-energy and well insulated houses and buildings. 

Production éco-énergétique d’eau chaude

Accumulateur thermique

  • Pour la production d'eau chaude
  • Compatible avec tout type de système de chauffage
  • Eau chaude saine et renouvelée grâce au ballon d'eau chaude antilégionelles
  • Connexion de panneaux solaires pour chauffer l’eau qui est ensuite stockée en vue de son utilisation ultérieure
  • Système prêt pour une intégration aux réseaux intelligents (« smart-grid-ready ») pour la production et le stockage de l’eau chaude pendant les périodes à tarif « heures creuses »







Domestic hot water is an important aspect to achieving the ultimate comfort at home. With Daikin’s ECH20 range of thermal stores, you can expect semi-instantaneous domestic hot water at any time. Easy to install and energy efficient, the ECH20 range maintains high standards of water sanitation and safety. The ECH2O thermal store is a perfect match with any technology, including air–to-water heat pumps, hybrid heat pumps or boilers.

Hot water savings with solar energy

Reduce your energy costs by taking advantage of the sun's renewable energy. Our solar panels are easy to install and produce up to 70% of the energy your hot water boiler needs. Equally available for all building types, our solar hot water systems accommodate small and large homes. Choose between a pressureless or pressurised hot water system.


Pressureless thermal hot water system

  • Ideal for new homes 
  • Higher energy performance than pressurised systems 
  • Requires a direct vertical connection from the tank to the solar collectors 
  • If there is no sun, the system automatically drains to prevent frozen pipes




Pressurised solar powered system

  • Ideal for renovations and existing homes 
  • Possibility to use curved piping to connect the tank to the solar collectors 
  • Filled with water and antifreeze to prevent frozen pipes 
  • The system is pressurised and sealed for your safety


Always in control

Toujours aux commandes

Il vous suffit de connecter votre système GCU Compact à un réseau Wi-Fi et de télécharger l'application Daikin Online Controller pour commander le thermostat, programmer les températures de consigne et passer en revue votre consommation d’énergie.

Téléchargez l’application depuis Google Play ou l’Apple App Store.

Daikin heating systems

Daikin offers a wide range of heating solutions equipped with the most efficient technologies.