aroTHERM air source heat pumps operate as "stand alone" systems providing central heating and hot water or as "hybrid" systems in conjunction with Oil or LPG boilers. When used in a hybrid system, the aroTHERM intelligently calculates the most efficient generator at any given time ensuring maximum economy of fuel use.
As you would expect from a world class manufacturer, Vaillant offer high quality back up services via their extensive network of field engineers.