Extending or Replacing an Old Heating System in Montréal: A Critical Decision
In Montréal, Laval, Longueuil, as well as on the North Shore and South Shore, many homeowners wonder how much longer their old heating system can keep running, and when it becomes more reasonable—financially and technically—to replace it with a modern HVAC unit. At AirGreen, we assist families, multi-unit building owners, and commercial property managers every day in making this difficult choice. Thanks to our hands-on experience, we know this decision isn’t just about the age of the system, but a combination of key factors we break down here.
Why Replacing an Old Heating System Becomes Inevitable
Age Isn’t the Only Factor
Most central heating systems (oil, natural gas, electric or central heat pumps) have an average lifespan of 15 to 25 years. That said, we’ve seen clients in Montréal with systems still working after 30 years... but at what cost? Systems over 20 years old no longer meet today’s energy efficiency standards, and repair costs often start adding up fast.
Here are a few signs that replacement is likely inevitable:
-
High and frequent repair bills
-
Replacement parts are hard to find or discontinued
-
Excessive energy consumption
-
Persistent discomfort in parts of the home (cold or overheated zones)
-
Increased noise levels
-
Poor performance during extreme cold (especially in January in Montréal)
Energy Efficiency: A Decisive Lever
New central heat pumps, like the Bosch BOVA R-454B, Goodman R-32, or Fujitsu KZAH R-32, offer up to 40% higher energy efficiency than older systems. During a recent service call in Saint-Lambert, we replaced a 1989 electric furnace with a Fujitsu 36,000 BTU KZAH central heat pump, resulting in a 38% reduction on the client’s Hydro-Québec bill—right from the first month.
Government Grants Make Replacing Even More Appealing
The LogisVert program from Hydro-Québec, federal subsidies, and Transition énergétique Québec incentives can cover up to $5,000 in grants for replacing low-efficiency heating systems. At AirGreen, we support our clients through the entire grant application process, from the initial forms to final approval by the government body.
Real-life example: In Repentigny, a client received $4,872 in grants for switching from an oil system to a Bosch BOVA 60,000 BTU central heat pump, which was eligible for LogisVert support.
When Repairing an Old Heating System Still Makes Sense
We never push for replacements at any cost. Sometimes, a thorough maintenance, component upgrade, or smart thermostat installation can extend the system’s life by a few more years.
Real case: In Ahuntsic, we recently performed a full service on a 2001 forced-air central heating system. By replacing the blower motor, cleaning the heat exchanger, and recalibrating the ducts, we helped the client gain 3 to 5 years of stable performance, for a modest $620 investment.
But beware: this approach is only valid if the system is structurally sound and parts are still available on the market.
What You Absolutely Need to Check Before Investing in Repairs
1. Repair History
A system with more than 3 major repairs in the last 24 months is typically nearing the end of its useful life.
2. Winter Performance
In Montréal, where temperatures often drop below -20°C, an underperforming heating system doesn’t just cause discomfort—it also drains electricity.
3. Noise and Vibration
A noisy system is often a sign of imbalance or aging components (motors, bearings, blower fan).
4. Cumulative Repair Costs
If the cost of repairs exceeds 25% of a new system, replacement is usually the better option.
Concrete Benefits of a New HVAC System
-
Immediate energy savings
-
Consistent and balanced comfort throughout the home
-
Improved indoor air quality
-
Quieter operation
-
Access to smart technologies (WiFi thermostats, remote control, multi-zone management)
-
Eligibility for local grants
Why Choose AirGreen to Evaluate and Replace Your Old Heating System
We don’t just sell systems—we diagnose, advise, install, and maintain with a fully personalized approach. Our technicians are trained to precisely assess your current equipment and propose reliable, long-term solutions, whether that’s targeted repairs or a full system upgrade.
On the South Shore, we recently replaced an old natural gas system in Boucherville with a Goodman 60,000 BTU central heat pump with R-32 high-efficiency refrigerant, in just two days, including the safe removal of the furnace and full ductwork reconfiguration.
What Our Clients Appreciate Most
-
Our honest recommendations
-
Our mastery of available grant programs
-
Our ability to respond quickly
-
Our clean and guaranteed installations
-
Our real-world experience across Montréal, Laval, Longueuil, North Shore, and South Shore
Our Practical Tips Before Making a Final Decision
-
Have your current system inspected by a certified technician
-
Request a side-by-side estimate for repair vs. replacement
-
Check your eligibility for current grants
-
Don’t wait for the cold season: delays get longer in winter
Conclusion
Repairing or replacing your heating system in Montréal is a major decision—but it can become a strategic investment in your comfort, budget, and environmental impact. At AirGreen, we’re by your side to guide you through this process, offering honest advice, personalized solutions, and flawless service throughout Greater Montréal.