Adapting to Quebec Winters with Efficiency and Comfort
At AirGreen, we understand just how much Montreal, Laval, Longueuil, the North Shore, and the South Shore winters can challenge heating systems. The multi-zone heat pump is increasingly becoming the go-to solution for homeowners seeking optimal energy efficiency while maintaining steady comfort in every room of their home. However, despite their growing popularity, several myths still surround them. So here are 5 surprising facts you absolutely need to know about multi-zone heat pump performance during winter in our Quebec climate.
1. Efficiency That Holds Up Down to -30°C, Depending on the Model
Contrary to popular belief, modern multi-zone heat pumps — especially from brands like Fujitsu, Gree, Mitsubishi, or Bosch — are specially engineered to operate reliably even when temperatures plummet. Some models, like the Fujitsu KRL or the Gree MultiZone Extreme, maintain heating capacity down to -30°C. These advances are made possible by ultra-efficient Inverter compressors, smart circuit boards, and advanced defrost systems.
At AirGreen, we installed a 36,000 BTU Fujitsu multi-zone heat pump in a century-old home in Outremont. Even during the notorious January storm, the rooms remained warm and comfortable with no need for extra electric heaters. This proves that with proper sizing and meticulous installation, these systems live up to their promise—even in the harshest conditions.
2. Multi-Zone Installations Reduce Energy Waste
A highly underrated benefit of multi-zone systems is their ability to cut down on energy loss through targeted heating. Unlike traditional central systems, where one source heats the entire home, the multi-zone heat pump allows you to set different temperatures for each area: living room, bedrooms, basement, and so on.
This means you don’t have to heat empty rooms, resulting in lower energy consumption. For instance, on a project in Laval-des-Rapides, we installed one outdoor unit connected to three independent indoor wall-mounted units. The homeowner quickly saw a 27% drop in their winter electricity bill, all while enjoying improved comfort.
3. Top Performance Relies Heavily on Installation Quality
A multi-zone heat pump’s efficiency depends largely on the installer’s expertise. At AirGreen, we perform a complete thermal analysis of each property before recommending the number of zones, the BTU capacity of each unit, and the ideal placement of the indoor heads.
On a job in Saint-Bruno-de-Montarville, a home with a cathedral ceiling presented a unique challenge: heating a mezzanine space upstairs without wasting warmth in the stairwell. We solved this by placing a directional wall unit in the right spot, eliminating cold zones and ensuring even comfort, even at -25°C.
4. The Defrost Cycle: A Necessary but Controlled Feature
One often misunderstood feature is the defrost cycle. Yes, your heat pump may blow cool air in winter from time to time—that’s normal. When it's very cold and there's moisture, frost builds up on the outdoor coil. The system briefly reverses its cycle to melt it.
That said, a well-installed system with a smartly positioned outdoor unit (raised off the ground and sheltered from dominant winds) will reduce the frequency and duration of defrost cycles. In Longueuil, at a duplex we equipped with a Gree multi-zone system, we placed the outdoor unit in a sheltered backyard. This greatly minimized heating interruptions—even during February’s frigid nights.
5. Substantial Grants Available for Multi-Zone Systems
Multi-zone heat pumps installed by AirGreen often qualify for significant government grants, particularly through Hydro-Québec’s LogisVert program, which can offer up to $5,000 depending on building specs, BTU capacity, and the model chosen. We always assess each project’s eligibility and help our clients through the application process.
For example, in a project in Terrebonne, a client received a $3,250 grant for the installation of a Bosch BOVA multi-zone system, which covered a large part of the equipment and labor costs.
Our Tips to Get the Most from Your Multi-Zone Heat Pump in Winter
Regularly Maintain Your Units
An annual maintenance visit—cleaning filters, coils, and drain lines—ensures your units perform reliably, even in the dead of winter.
Choose the Right Model for Cold Climates
Not all multi-zone systems are equal. It’s essential to go with a model designed for cold climates, with strong SEER and HSPF ratings, but more importantly, with nominal heating capacity that holds at low temperatures.
Work with a Certified Specialist
At AirGreen, we’re proud to be a certified and accredited installer specialized in high-efficiency HVAC systems. We only recommend tailor-made solutions, adapted to the thermal realities of your home in Montreal, Laval, Longueuil, or the surrounding shores.
The AirGreen Approach: Expertise, Precision, and Transparency
We firmly believe every project deserves a thorough technical evaluation. That’s why, before every installation, we carry out a complete energy modeling, taking into account building orientation, insulation levels, zone-specific needs, and the occupants’ lifestyle habits.
With over 300 successful multi-zone installations across Greater Montreal, our team has mastered the art of turning harsh Quebec winters into seasons of comfort. By combining top-tier products with expert craftsmanship, we guarantee maximum performance and long-term savings.