Compact electric flow boiler for pressurised or open-vented systems. Heats water for underfloor heating systems. Works with programmers, circulating pumps and room thermostats. Ideal for apartments, extensions, loft conversions or conservatories where space is at a premium. Max. Central Heating Output: 11kW Copper Heat Exchanger For use with Vented & Unvented Cylinders Not Compatible with Solar Panels 1 Year Guarantee 37,500BTU LED Indicators Adjustable Temperature Max. Central Heating Output: 11kW Copper Heat Exchanger For use with Vented & Unvented Cylinders Not Compatible with Solar Panels 1 Year Guarantee 37,500BTU LED Indicators Adjustable Temperature