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5 Best Combi Boilers of 2025

Last Updated - 2025/10/01

1
Best Choice

✖
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

Rinnai

Rinnai i150SN Condensing Gas Boiler, Whole Home Natural Gas Heater with Space-Saving Design and Smart Features, (150K BTU)

Rinnai

CA$5,650.00

More Details
Main highlights
- Whole Home Heater: Heat the whole house with our tankless boilers, featuring a stainless-steel heat exchanger with a modulating wire mesh burner, and experience energy-efficient warmth and comfort
- Smart Features: This high-efficiency gas boiler's multizone control capability allows thermostat and integrated control pumps to connect directly to the boiler; Wall mount heater features safety child-lock that automatically turns off central heating
- Professional Installation Recommended: Visit the Find a Rinnai PRO page on our website to locate a qualified technician in your area to install your boiler; We do not recommend installing a heater without a technician
- Guaranteed to Last: 12-, 5-, and 1-year residential and 5-, 5-, and 1-year commercial standard warranty for heat exchanger, parts, and labor respectively
- Easy Interface: Our energy efficient heater has a digital display main screen, temperature and pressure display, and an outdoor reset sensor with easy parameter settings; Adjust CH temperature between 104°F and 180°F and DHW between 98°F and 140°F
CA$5,650.00
2
Best Value

✖
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

Rinnai

Combi Boiler CH 150K BTU/DHW 199K BTU

Rinnai

CA$4,599.62

More Details
Main highlights
- Smart Sense Gas Adaptive Technology
- Simultaneous Space Htg and DHW
- High Altitude Approved up to 10,100 ft.
- Advanced Controls with Setup Wizard
- 7 Heating Reset Curves
CA$4,599.62
3

✖
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

Rinnai

Combi Boiler CH 120K BTU/DHW 199K BTU

Rinnai

CA$3,983.22

More Details
Main highlights
- Smart Sense Gas Adaptive Technology
- Simultaneous Space Htg and DHW
- High Altitude Approved up to 10,100 ft.
- Advanced Controls with Setup Wizard
- 7 Heating Reset Curves
CA$3,983.22
4

✖
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

Noritz

Noritz NRCB199DV-NG Indoor Direct Combination Boiler (Standard Vent Convertible) with Built-in Pump, max 199,900 DHW, 11.1 Gpm, 120,000 Btuh Space Heating-Natural Gas, Gray

Noritz

CA$4,299.00

More Details
Main highlights
- Superior temperature stability for domestic hot water
- Simultaneous domestic hot water and heating
- Noritz accessory
- Easy to install with new wall bracket
- Clean burner
CA$4,299.00
5

✖
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

Rinnai

Combi Boiler CH 60K BTU/DHW 160K BTU

Rinnai

CA$3,513.00

More Details
Main highlights
- Smart Sense Gas Adaptive Technology
- Simultaneous Space Htg and DHW
- High Altitude Approved up to 10,100 ft.
- Advanced Controls with Setup Wizard
- 7 Heating Reset Curves
CA$3,513.00

5 Best Combi Boilers of 2025

Rinnai i150SN Condensing Gas Boiler, Whole Home Natural Gas Heater with Space-Saving Design and Smart Features, (150K BTU)

Combi Boiler CH 150K BTU/DHW 199K BTU

Combi Boiler CH 120K BTU/DHW 199K BTU

Noritz NRCB199DV-NG Indoor Direct Combination Boiler (Standard Vent Convertible) with Built-in Pump, max 199,900 DHW, 11.1 Gpm, 120,000 Btuh Space Heating-Natural Gas, Gray

Combi Boiler CH 60K BTU/DHW 160K BTU

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