Combi Boiler Water Heating & Space Heating

Although both can heat your home and provide hot water, there are key differences. Traditional boilers are designed mainly for space heating. Hot water from the boiler is circulated through radiators or a hydronic heating system to warm the ambient air. The traditional boiler water may also be used for domestic hot water by directing the water through a separate, integrated water heating unit before routing it to a fixture, such as a faucet or shower. Some traditional boilers are compatible with potable water, but others require additional water treatment.

Combi boilers are designed to accomplish both space and water heating with a single appliance. Like a tankless water heater, a combi boiler provides hot water on demand. It can also seamlessly switch between water heating and space heating to provide the best possible experience.

Combi boilers are highly efficient for both space and water heating, and they may contribute to lower energy costs in your home.

Yes! They are ENERGY STAR® certified and have a 95% AFUE rating. Because combi boilers provide both space and water heating, it is like having two high efficiency appliances in one. The ProLine® XE Combi Boiler also has a modulating combustion system with 10:1 turndown to ensure high-efficiency operation even when heating demands are reduced.

When choosing a combi boiler, consider how much water your household requires, including the number of people bathing or taking showers, the types of appliances you have and how often they run simultaneously. Combi boilers heat water as needed, so the more hot water you use during peak hours, the greater the output you require. Look at the amount of water the boiler can heat in gallons per minute and compare this to your home's hot water needs.