Reducing energy consumption without sacrificing comfort: a winter priority
The harsh Québec winter, with its long stretches of extreme cold, puts residential heating systems to the test. In Montréal, Laval, Longueuil, on the North Shore as well as the South Shore, many households see their Hydro-Québec bills spike significantly between December and March. At AirGreen, we know it’s possible to combine thermal comfort and energy efficiency, especially through the installation and optimization of a wall-mounted heat pump. Here’s how to effectively lower your electricity costs during extreme cold, while getting the most out of your HVAC system.
Understanding how a wall-mounted heat pump works in winter
A wall-mounted heat pump, also called a mini split, captures heat from outside and transfers it indoors. Even in cold weather, it can extract enough energy to efficiently heat a space. Modern models like the Gree Extreme, Fujitsu KZAH, or Sharp ZU1 are built to operate in temperatures as low as -30°C, making them ideal for our climate.
But when the temperature drops drastically, the heat pump has to work harder, which can increase electricity use – especially if it’s not properly calibrated or used efficiently.
How to optimize your wall-mounted heat pump during cold snaps
Keep a stable temperature instead of adjusting the thermostat constantly
A common mistake we see among our clients in Montréal and the South Shore is to drop the temperature significantly at night or when away, then crank it back up quickly. This forces the heat pump to run at full capacity for long periods, cancelling out any savings. It’s more efficient to maintain a consistent temperature, ideally between 20 and 21°C.
Use the correct mode: avoid “auto” mode
Auto mode can cause the system to switch frequently between heating and cooling, depending on internal sensors. We recommend using "heating" (HEAT) mode exclusively in winter. This allows the heat pump to focus solely on heat production, reducing fluctuations and therefore consumption.
Clean your filters regularly to prevent overconsumption
A clogged filter restricts airflow and forces the unit to work harder. At AirGreen, we advise all our clients in Montréal, Laval, and Longueuil to clean their filters at least once a month during the winter.
Case study: Gree Extreme heat pump installation in Terrebonne (North Shore)
In January, a family in Terrebonne contacted us to replace an old wall-mounted convector with a Gree Extreme 18,000 BTU wall-mounted heat pump. Their goal: reduce their Hydro-Québec bill, which was exceeding $420 per month in winter.
Our team installed the heat pump in the main living area, positioning it strategically to maximize airflow. Thanks to its high coefficient of performance (COP) even at -25°C, this model allowed them to cut their monthly bill to about $265, a savings of nearly 38%. We also provided custom recommendations for how to use the system and manage unoccupied rooms.
Practical tips to reduce your energy consumption even further
Proper insulation is key
Even the best-performing heat pump won’t help if your house is poorly insulated. Caulking, weather stripping, and insulating your basement or attic can boost heating efficiency by 15 to 30%.
Pair your heat pump with a smart thermostat
A smart thermostat (compatible with many Fujitsu, Gree, or Mitsubishi models) can analyze your routines and optimize consumption accordingly. It can also lower the temperature when you’re away and bring it back up before you return.
Take advantage of free solar heat
Open your curtains during the day to let natural heat in, and close them at night to keep the warmth inside. This simple step can make a difference, especially during long stretches of sub-zero temperatures.
The importance of professional maintenance
A preventive HVAC service from our AirGreen technicians includes:
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Checking refrigerant pressure
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Cleaning heat exchangers
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Testing electrical components
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Maximizing performance and extending system lifespan
We offer custom maintenance packages for owners of wall-mounted heat pumps across the Greater Montréal area, including Brossard, Laval, Saint-Jérôme, Longueuil, and Repentigny.
Available grants to help you save even more
One of the best ways to lower your overall costs is by taking advantage of government grants, such as:
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Hydro-Québec’s LogisVert (up to $2,172 for certain installations)
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Rénoclimat
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Chauffez Vert
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Federal Greener Homes Program
We help you choose eligible heat pump models and navigate the application process so you can get the most out of your investment.
Why trust AirGreen?
For years, we’ve been installing and servicing cutting-edge HVAC systems throughout Greater Montréal. We bring together:
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In-depth technical expertise
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A strong understanding of Québec’s climate
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Partnerships with leading brands (Fujitsu, Gree, Sharp, Bosch, Haxxair)
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Personalized and transparent customer service
We’ve helped hundreds of families and property managers optimize their thermal installations, always offering sustainable, efficient, and cost-effective solutions.
Conclusion: yes, you can lower your bill without sacrificing comfort
Choosing a high-performance wall-mounted heat pump and following best practices allows you to face Québec’s winter with peace of mind, without letting your Hydro-Québec bill skyrocket. With expert support from AirGreen, you can get the most out of your HVAC system while sticking to your budget and being eco-conscious.
We’re here for all your installation, maintenance, or energy assessment needs, whether you're in Montréal, Laval, Longueuil, the North Shore, or the South Shore. Let’s heat smarter, and spend less.