All Varia Ah models feature a front pane with a ratio of 2:1, which can be opened with an electric pane opener (S-ESAM) if desired. The 13 kW output can be put to good use thanks to the integrated storage medium or a convection air housing. Varia Ah H2O lets you generate warm water for your whole home in a sustainable and CO2-neutral manner and the digital S-Thermatik NEO gives you digital support. This combination is sure to be the right choice.