 Read More Combi Boilers - Efficient Hot Water and Space 0 · Benefits of Combi Boiler Water Heaters. All-in-One Water amp; Space Heating. Our high efficiency 00% AFUE combi boilers can replace both a water heater and space heater in your home to save you space, improve performance, and help you save money on operating costs. Reliable Hot Water Supply. The ProLine ® XE Combi Boiler provides industry-leading continuous hot water delivery with its on Read More 