Types of gas boilers in Quebec
There are two main types of natural gas boilers:
Standard boiler (non-condensing): 80-85% efficiency, hot combustion gases escape through the chimney. Simpler, less expensive, but less energy-efficient.
Condensing boiler: 90-97% efficiency, recovers latent heat from combustion gases. More expensive upfront but significant gas bill savings. Recommended for new installations.
Mandatory maintenance — What regulations say
In Quebec, natural gas boiler maintenance must be performed by an Energir-certified technician. Annual maintenance includes:
- Combustion check and flame adjustment
- Heat exchanger cleaning
- Leak detection system inspection
- Safety valve and thermostat testing
- Combustion gas evacuation check
Heating Price Table — Quebec
Indicative price ranges for the Montreal area. Rates may vary by city, complexity and contractor.
| Service | Min | Max |
|---|---|---|
| Gas boiler annual maintenance | $180 | $350 |
| Gas boiler replacement (condensing model) | $4,000 | $8,000 |
| Oil-to-gas conversion | $3,500 | $7,000 |
| Emergency boiler repair | $200 | $600 |
Indicative ranges compiled by UrgencePlomberieQC.com, July 2026.
Frequently Asked Questions
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