Improve Your Heating Without a Full Replacement: Practical Tips from AirGreen
In the harsh winter landscape of Montréal, Laval, and across the North Shore and South Shore, many homes are still equipped with old electric or oil furnaces. Replacing the entire system isn’t always a realistic short-term option. At AirGreen, we understand that. That’s why our seasoned heating technicians offer real-world strategies to improve the performance of an existing furnace and maximize comfort while reducing energy consumption.
1. Thermostat Optimization: The Overlooked Detail That Makes a Big Difference
One of the most effective ways to cut down on heating bills is to replace an old mechanical thermostat with a programmable or smart digital model. During a recent visit to Longueuil, our team installed an Ecobee smart thermostat on a 20-year-old Lennox furnace. The result? Nearly a 15% drop in electricity bills over the winter, without modifying the central system.
Pro Tip: Set different temperature targets depending on the time of day or night. Lowering the temperature by 3°C during unoccupied hours can generate significant savings.
2. Full Cleaning of Ducts and Air Filters: Immediate Impact on Efficiency
Over time, air ducts fill up with dust, pet hair, and other debris that slow down airflow, force the furnace to work harder, and compromise air quality. A thorough cleaning not only increases airflow but also reduces the thermal load on the furnace.
At a client’s home in Brossard, a CVAC cleaning job by our technician Sébastien led to a 20% drop in heating cycles, improving both comfort and the system’s lifespan.
3. Sealing and Insulation: A Crucial Step Often Forgotten
Even a high-performance furnace can’t make up for heat loss due to poor insulation. Our heating technicians always recommend a thermal envelope sealing diagnosis, especially around windows, doors, and attic hatches. In Sainte-Thérèse, we partnered with a building envelope expert to seal off heat leaks detected by thermal imaging. This led to an 18% reduction in heating consumption without changing the equipment.
4. Installing a Manual Zoning System: Direct Heat Where It’s Needed Most
In large or multi-level homes, zoning is a clever solution. With adjustable air registers and manual bypass dampers, you can direct heat to the spaces being used. In Saint-Bruno-de-Montarville, a triplex owner benefited from this setup, allowing him to manage heating independently on each floor, without modifying the main furnace.
5. Adding a High-Efficiency Blower Motor (ECM)
Replacing a furnace’s standard blower motor with an ECM (electronically commutated motor) is another trick we frequently apply. This type of motor uses less electricity, reduces noise, and automatically adjusts the blower speed based on heating demand. In Laval, this upgrade to a 15-year-old York furnace resulted in a 12% efficiency gain, confirmed by monthly energy bill readings.
6. Setting Up a Customized CVAC Maintenance Plan
Many performance issues come from a lack of regular maintenance. At AirGreen, we’ve created a personalized plan that includes:
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Inspection of electrical connections
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Burner check (if applicable)
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Lubrication of moving parts
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Safety sensor check
For example, at a home in Boisbriand, this type of maintenance plan prevented a total breakdown in the middle of January, while extending the estimated lifespan of the system by five years.
7. Adding a Wall-Mounted Heat Pump for Shoulder Seasons
An aging furnace doesn’t need to do all the work—especially in spring or fall. We often recommend installing a small wall-mounted heat pump (such as the Gree Lomo 12,000 BTU) in main living areas to heat efficiently during milder seasons. These systems run at low cost and reduce strain on the furnace, lowering wear and tear.
In Verdun, a client with an electric furnace dating back to 1999 had this hybrid setup installed, qualified for a LogisVert grant, and saved over $800 during one winter.
At AirGreen, Every Old Furnace Has Potential
We believe that an aging system doesn’t necessarily mean it’s obsolete. Thanks to our customized approach, our certified technicians, and our deep knowledge of the challenges faced by homes across the Greater Montréal area, we help homeowners maximize their heating comfort without breaking the bank.
Whether you’re in Montréal, Laval, on the South Shore in Boucherville, or the North Shore in Blainville, our team can offer a complete evaluation of your heating system and real solutions to improve the performance of your current furnace.
Why Choose AirGreen?
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We know the available grants, best practices for CVAC installation, and the limitations of older equipment.
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We provide effective solutions without forcing you to replace everything.
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Our work is fast, transparent, and focused on measurable results.
Ready to improve the efficiency of your old furnace without replacing your entire CVAC system?
Contact AirGreen today for a free assessment and see how our team can enhance your thermal comfort with practical, affordable, and long-lasting solutions.