Combi Boilers
Heating and hot water from one compact unit
A combi (combination) boiler heats your home and supplies hot water on demand from one compact unit, eliminating the need for a separate hot-water tank. This makes combi boilers ideal for condos, townhomes, and homes where space is at a premium. Modern condensing combis reach 95%+ AFUE and deliver instant hot water, though very high simultaneous demand (multiple showers at once) can stretch a single unit.
Pros & considerations
Pros
- No separate hot-water tank needed
- Compact, space-saving
- On-demand hot water (no standby loss)
- Lower install cost in tight spaces
Considerations
- Limited simultaneous hot-water flow
- Hot water can dip with multiple fixtures
- May need an upgrade for large households
Is a combi boiler right for you?
A 1–3 bedroom home or condo with one or two bathrooms and limited mechanical space.
Best for
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Top combi boilers
Highest-rated combi boiler models across all brands.
Vitodens 222-F Combi Storage
AFUE
95%
Output
118k BTU
Turndown
10:1
Warranty
10 years
Installed from
$8,800
NCB-180H Combi
AFUE
95%
Output
142k BTU
Turndown
11:1
Warranty
10 years
Installed from
$5,400
NCB-210H Combi
AFUE
95%
Output
188k BTU
Turndown
15:1
Warranty
10 years
Installed from
$6,200
NFC-175 Fire-Tube Combi
AFUE
95%
Output
166k BTU
Turndown
11:1
Warranty
15 years
★ Longest combi warranty
Installed from
$5,800
DC 33-160 Combi
AFUE
95%
Output
152k BTU
Turndown
10:1
Warranty
12 years
Installed from
$5,800
Vitodens 100-W Combi 26
AFUE
94%
Output
84k BTU
Turndown
5:1
Warranty
10 years
Installed from
$5,400
NCB-150H Combi
AFUE
95%
Output
114k BTU
Turndown
11:1
Warranty
10 years
★ Best-selling combi
Installed from
$5,000
NFC-200 Fire-Tube Combi
AFUE
95%
Output
188k BTU
Turndown
11:1
Warranty
15 years
Installed from
$6,200