A decade of multizone HVAC expertise: what every homeowner in Montreal, Laval, and Longueuil should know
For over 10 years, at AirGreen, we’ve been installing multizone heat pumps throughout Montreal, Laval, Longueuil, and the North Shore and South Shore areas. This hands-on experience has allowed us to develop deep expertise and observe, year after year, some surprising truths that few HVAC contractors take the time to explain to clients. Here are 5 essential lessons we’ve learned—insights every homeowner should know before investing in a multizone system.
Installation quality matters more than the brand
One of the most common mistakes we’ve seen during our service calls is placing too much emphasis on the brand while neglecting the quality of the installation. A multizone heat pump—whether it’s from Fujitsu, Gree, Haxxair, Lennox, or Bosch—will never perform at its best if it’s poorly installed.
At AirGreen, we’ve often had to correct poorly configured systems: miscalculated refrigerant line lengths, oversized indoor units, outdoor condensers installed in high-wind zones. A professional HVAC installation requires expertise that only real-world experience can provide.
Real-life example: In Sainte-Thérèse, we recently replaced a 36,000 BTU multizone system where three out of four zones were underperforming. After conducting an audit, we identified balancing issues in the refrigerant lines. The result? After our intervention, the client’s energy usage dropped by 27% in a single winter.
Proper sizing avoids 80% of future problems
Many people assume that a more powerful unit guarantees better comfort. That’s false. In HVAC, proper sizing is everything. An oversized heat pump leads to short cycles, premature wear, and uncomfortable indoor temperatures.
We use specialized software combined with our on-site expertise to precisely calculate the actual thermal load for each zone. Our clients in Boucherville, Blainville, and Verdun often thank us for the perfectly balanced comfort they enjoy—even at -25 °C.
Every home is unique: HVAC solutions should be too
There’s no such thing as a “one-size-fits-all” solution for multizone heat pumps. A century-old home in Outremont, a multi-generational house in Laval, or a brand-new condo in Brossard all require a tailored installation strategy.
We evaluate:
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Room orientation
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Insulation level
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Lifestyle habits (work-from-home, closed bedrooms, etc.)
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Priority zones for thermal comfort
This approach allows us to maximize energy efficiency while ensuring optimal comfort, zone by zone.
Noteworthy installation: In Longueuil, a retired couple contacted us to optimize their two-level home. We recommended a 30,000 BTU Gree multizone heat pump with three wall-mounted indoor units strategically placed. The result: they eliminated their electric baseboard heating and cut their monthly energy bill by 38%.
Grants influence decisions… but not always for the right reasons
Financial incentive programs, like Hydro-Québec’s LogisVert program, are often what push homeowners to go multizone. Understandably so. But it’s crucial not to choose solely based on grant eligibility.
We help our clients optimize both technical and financial decisions, without sacrificing performance. Sometimes, a slightly less subsidized system—yet better suited to the home’s layout—offers greater long-term value.
Pro tip: Fujitsu KX heat pumps qualify for appealing subsidies but require careful planning of distances between units. We always guide our clients through that process.
Regular maintenance for a multizone system—a too-often overlooked habit
Finally, a well-maintained multizone system can last 15 to 20 years. Unfortunately, many homeowners skip annual maintenance, thinking multizone setups are “maintenance-free.”
At AirGreen, we offer custom maintenance plans, which include:
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Cleaning of coils and filters
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Refrigerant level checks
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Electrical connection inspections
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Performance testing per zone
This rigorous follow-up ensures long-term reliability and helps prevent costly breakdowns.
AirGreen’s expertise in numbers: more than know-how, it’s a promise
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Over 750 multizone heat pump installations since 2013
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98% customer satisfaction rate (internal data, 2024)
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Projects completed in over 70 municipalities across the Greater Montreal Area
Our pride? Delivering a premium HVAC experience, combining technical performance, long-term durability, and human-centered service.
Why trust AirGreen for your multizone installation?
Because we:
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Take the time to understand your home and your needs
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Size every zone with precision
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Work with the best brands (Fujitsu, Bosch, Gree, Lennox, etc.)
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Provide fast, local after-sales service
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Maximize your available grants
In summary: What 10 years of installations have taught us
A multizone heat pump, when well designed and properly installed, is an unbeatable solution for combining comfort, efficiency, and savings. But it’s a technology that requires a trusted partner, capable of turning complex systems into simple, durable solutions for you.
At AirGreen, we turn every installation into a performance benchmark, and every customer into a satisfied ambassador.