Fully electric low temperature heating with an output range of 13.6 to 49.1 MBH / 4 to 14.4 kW;Automatic modulation of the heating output according to the heat demand;The water temperature in the heating zone can be set to between 85 Degree and 140 Degree F (29.4 Degree and 60 Degree C);Flexible and space saving installation;Comes with integrated 3-speed circulating pump and a digital control unit with outdoor reset logic;Can be used as a primary low-temperature heat source or as backup