Combi Boiler Selector
A combi boiler delivers heating and on-demand hot water from one unit. Tell us about your home and hot-water needs to see the best-matched combi boilers.
2 bath
2 fixtures
e.g. 2 = two showers at once, or a shower + kitchen sink.
1,800 sq ft
4.4 GPM
Recommended domestic hot-water flow
Heating output needed76,000 BTU/hr
Bathrooms2
Combi recommended?Yes — great fit
Frequently asked questions
Is a combi boiler right for my home?+
Combi boilers are ideal for condos, townhomes, and small-to-mid homes with 1–2 bathrooms. Larger homes with high simultaneous hot-water demand may need a storage combi or heat-only boiler with a tank.
How do I size a combi boiler?+
Match the heating output (BTU/hr) to your home’s heat loss, and the hot-water flow (GPM) to your peak simultaneous demand — about 2 GPM per fixture used at once.
Ready for the next step?
Get matched with approved local installers and real quotes.