A reliable, high-performance, and advanced HVAC solution to face the winter
When winter temperatures drop well below zero in Quebec—especially in Montréal, Laval, Longueuil, on the North Shore and the South Shore—HVAC systems are put to the test. In the face of this recurring climate challenge, new-generation multizone heat pumps prove to be an essential solution, combining energy efficiency, flexible installation, and absolute comfort even at -25°C. At AirGreen, we install these innovative systems daily and have witnessed just how much they improve our clients’ lives during the winter.
Understanding the multizone heat pump: a custom system for every room
Unlike conventional heat pumps that heat or cool only one space, multizone systems allow multiple indoor units to be connected to a single outdoor unit. This means each room or zone in the home can be heated or cooled independently, based on the needs and preferences of the occupants.
Typical components of a multizone system:
-
A high-performance outdoor unit, often equipped with an Inverter compressor.
-
Two to eight wall-mounted or console indoor units, installed in bedrooms, living rooms, offices, or basements.
-
A remote or wall controller for each zone, for precise control.
Why modern multizone heat pumps are ideal for Quebec winters
For years, heat pumps had a reputation for becoming inefficient once the mercury dropped below -10°C. But new-generation models like the Gree Multi-Ultra, Fujitsu AIRSTAGE, and Daikin Multi-Zone R32 have completely changed that reality. Thanks to advanced technologies, they continue to operate at -25°C, even -30°C, with impressive efficiency.
Technologies that make the difference:
-
High-performance R-32 or R-410A refrigerant gas.
-
Variable-speed (Inverter) compressor that adjusts dynamically based on outdoor temperature.
-
Smart defrosting, preventing prolonged interruptions.
-
Optimized heat exchangers for maximum heat extraction, even in freezing temperatures.
Case study: installation of a Gree Multi+ multizone heat pump in Longueuil
Recently, our team was commissioned for an installation project at a single-family home in Longueuil, where the homeowners were looking for an energy-efficient heating system capable of covering the entire house. They chose a Gree Multi+ multizone heat pump with a 36,000 BTU outdoor unit, connected to four 9,000 BTU wall-mounted units.
Challenges faced:
-
Complex layout of the house with hard-to-reach zones.
-
Need for optimal operation even during partial power outages.
AirGreen solutions:
-
Use of high-efficiency pre-insulated copper piping to minimize heat loss.
-
Programming of the units to activate an automatic antifreeze mode in case of sudden temperature drops.
-
Setup of automatic switch-over to auxiliary heating, ensuring uninterrupted comfort.
Result: the client now enjoys stable thermal comfort in every room, even during recent cold spells that hit -27°C in February.
The advantages of multizone systems across Greater Montreal
Whether you live in Laval, Brossard, Terrebonne or Saint-Lambert, multizone heat pumps are particularly well-suited to the architectural realities of the region: condos, duplexes, older homes with hardwood floors, or new constructions.
Here’s why:
-
Flexible installation: wall units can easily be installed in tight spaces or ductless homes.
-
Energy savings: since each zone is independent, you only heat the rooms you use.
-
Grant eligibility: several models are eligible for Hydro-Québec’s LogisVert program, offering rebates of up to $2,500.
-
Noise reduction: new outdoor units are quiet—ideal for residential neighborhoods.
Best practices when installing a multizone heat pump
To maximize your system’s winter performance, some mistakes must absolutely be avoided. At AirGreen, we make it a point to educate our clients every step of the way.
Expert tips:
-
Choose the right BTU capacity based on the size and insulation of each zone.
-
Avoid installing the outdoor unit too close to the ground to prevent snow accumulation.
-
Clean the indoor unit filters regularly, especially during high-usage winter months.
-
Schedule an annual maintenance check, including refrigerant circuit inspection and proper defrost function testing.
AirGreen’s expertise at the service of your winter comfort
Our team of certified technicians has in-depth knowledge of multizone heat pump installation and maintenance. We’ve completed over 500 installations in Montréal, Laval, Longueuil, the North Shore, and the South Shore, always with the same high standards: personalized assessment, quality equipment, and meticulous finish.
Client testimonial:
“Since AirGreen installed our multizone heat pump, we haven’t needed our old oil heating system. Even at -28°C, the warmth is steady and comfortable. A worthwhile investment from year one.”
Grants available for high-performance multizone heat pumps
Multizone heat pumps are among the most subsidized appliances today under energy efficiency incentive programs. Here are the main available supports:
-
Hydro-Québec’s LogisVert program: up to $2,500 depending on the model and configuration.
-
Chauffez Vert (Transition énergétique Québec): for replacing oil or propane systems.
-
RénoVert tax credit (if still applicable for the fiscal year).
In conclusion: a smart investment, especially in winter
Choosing a multizone heat pump today means investing in a flexible, high-performance, and cost-efficient HVAC system, built to handle Quebec’s harshest winters. At AirGreen, we’re with you every step of the way: needs assessment, professional installation, responsive after-sales service, and preventive maintenance.
Trust our expertise to enjoy optimal comfort year-round, while also reducing your energy bills.