Hidden Energy Consumption… Until the Hydro-Québec Bill Arrives
In Montréal, many homes and businesses are still running on older air conditioners, some of which were installed over 10 or even 15 years ago. While these units may still technically work, they are massive energy hogs. Without realizing it, users are paying 2 to 3 times more on their electricity bills compared to what they would pay with a modern system. At AirGreen, we’re frequently called in to replace outdated air conditioners and help our clients achieve lasting savings. Here’s why these old models are so costly to operate.
Understanding the Technological Gap Between Old and New Air Conditioners
Technological advancements in the HVAC (heating, ventilation, and air conditioning) industry over the last two decades have been dramatic. Older air conditioners typically operate on “all-or-nothing” systems—either the compressor is blasting at full power, or it’s off.
In contrast, modern Inverter air conditioners, like those we install across Montréal, Laval, Longueuil, the South Shore, and the North Shore, can adjust their power output based on the room temperature. The result: fewer consumption peaks, better thermal stability, and up to 60% energy savings.
Case Study: Wall-Mounted Unit Replacement in Villeray
A client in Villeray contacted us after noticing bill spikes during heatwaves. His old 12,000 BTU wall-mounted air conditioner, installed in 2009, consumed 1.8 kWh per hour. After we installed a Fujitsu RLS3H Inverter model, usage dropped to just 0.6 kWh/h—with better performance. The outcome: over 35% savings in the first month alone.
Old Air Conditioners and Outdated Refrigerants
Another overlooked factor is the type of refrigerant used. Older units typically rely on R-22, a gas now banned in Canada due to its ozone-depleting properties and poor energy efficiency.
Newer systems use more eco-friendly refrigerants like R-32 or R-454B, which are not only environmentally safer but also more thermally efficient, meaning they transfer more heat using less electricity.
Why This Has a Major Impact on Your Energy Bills
The lower the refrigerant’s efficiency, the harder the compressor must work to reach the desired temperature. This not only increases consumption but also leads to premature wear and tear. The result: a double blow for the user—sky-high consumption and a higher risk of breakdowns.
Energy Losses Due to Aging Components
Even with good maintenance, air conditioners age. Condensers get dirty, fans lose performance, seals deteriorate. All these minor issues add up to invisible yet costly energy losses.
At AirGreen, we use thermal imaging and airflow sensors to measure these losses during our assessments. More often than not, replacing a unit that’s over 10 years old is more economical than continuing to run it, even if it still “seems” fine.
Available Grants in Montréal for Replacing Old AC Units
Here’s the good news: multiple programs are available to help replace inefficient systems in Montréal and surrounding areas.
Example: Hydro-Québec’s LogisVert Program
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Up to $1,860 in subsidies for installing an eligible high-efficiency heat pump
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Available for single-family homes, duplexes, and triplexes
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Requirements: work with a certified installer like AirGreen and replace an older, less efficient system
Other Available Incentives:
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Provincial tax credits
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Low-interest financing via municipal programs
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Targeted grants for condos and small businesses
Customer Testimonial: “My Hydro-Québec Bill Was Cut in Half”
Monique, a resident of Longueuil, contacted AirGreen last June. Her window AC unit was over 12 years old. After we installed a Gree Lomo 12,000 BTU R-32 wall-mounted air conditioner, she saw a 52% reduction in her electricity bill that summer. “On top of the comfort, I finally get peaceful nights without that motor noise.”
How to Tell If Your Unit Is Too Old
Here are a few signs your air conditioner is an energy guzzler:
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It was installed before 2012
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It runs loudly or unevenly
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It takes a long time to cool the space
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Your electricity bills spike every summer
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It uses R-22 (usually mentioned on the outdoor unit’s label)
If this sounds like your unit, it’s time to call AirGreen for a free thermal evaluation and personalized recommendation.
Conclusion: Replacing an Old Air Conditioner—A Logical and Cost-Effective Choice
Hanging onto an old AC unit to “save money” is a false economy. Between the high consumption, poor comfort, and increased risk of failure, switching to a modern model often pays for itself in under two years, especially with the available subsidies in Montréal, Laval, Longueuil, the South Shore, and the North Shore.
At AirGreen, we guide you through every step: diagnosis, selecting the right equipment, clean installation, applying for grants, and preventative maintenance. Your comfort is our priority, and your savings are our mission.