Poor choices in multi-zone heat pumps can be expensive: what our clients in Montreal have taught us
At AirGreen, our day-to-day experience with residents in Montreal, Laval, Longueuil, the North Shore and South Shore has revealed a consistent truth: when a homeowner makes the wrong choice in a multi-zone heat pump, the consequences are often expensive, uncomfortable, and avoidable. That’s why we’re sharing three common mistakes we see in the field, supported by real testimonials from clients who turned things around thanks to our expertise in HVAC installation.
1. Overlooking the real needs of each zone to heat or cool
Testimonial from Sophie, homeowner in Outremont (Montreal)
When Sophie bought a century-old home in Outremont, she opted for a 24,000 BTU multi-zone heat pump with two wall-mounted units. Unfortunately, the initial installer didn’t take into account the sun exposure on the upper floor and the poor insulation in the attic. The result: during summer, the upstairs remained stifling.
After consulting with our team, we recommended a Fujitsu AOU36RLXFZH model, paired with three wall-mounted units of different sizes (7,000, 9,000 and 12,000 BTU), each adapted to the thermal characteristics of the individual rooms. The result: a 28% reduction in her energy bill, even comfort throughout the home, and total satisfaction.
AirGreen Tip: Never underestimate the importance of a precise heat load calculation, room by room. An improperly sized multi-zone heat pump will lead to overconsumption, discomfort, and premature system wear.
2. Choosing a multi-zone system based solely on the initial price
Testimonial from Marc, duplex owner in Saint-Léonard (Montreal)
Marc had found a contractor offering a Gree Free Match heat pump at an unbeatable price. Tempted by the low purchase cost, he didn’t check the energy efficiency ratings (SEER/HSPF) or whether the system qualified for the Hydro-Québec LogisVert rebates.
A few months after the installation, his electricity consumption had skyrocketed, and he learned that his unit didn’t meet the criteria for the $1,704 rebate. Frustrated, he contacted us to re-evaluate the installation.
We replaced it with a Bosch BOVA36HDN1-M20G, compatible with R-454B, offering high energy efficiency (SEER 20+, HSPF 10.5). Although this new configuration was more expensive upfront, Marc was able to recover a significant portion of the cost thanks to government incentives.
AirGreen Tip: The purchase price never reflects the true long-term cost. Choose a system that is efficient, durable, and rebate-eligible.
3. Neglecting the installation quality and contractor experience
Testimonial from Isabelle, triplex owner in Laval-des-Rapides
Isabelle invested in a high-end multi-zone heat pump for her three rental units. Unfortunately, the initial installation by an inexperienced contractor turned into a disaster: poorly insulated refrigerant lines, incorrect gas levels, and an outdoor unit positioned directly in the path of winter winds.
The result: excessive noise, frequent breakdowns, and constant complaints from tenants.
AirGreen stepped in to reinstall the entire system. We relocated the outdoor unit away from prevailing winds, redid the refrigerant lines, balanced airflow properly, and applied strict HVAC installation standards. All without interrupting tenant comfort.
AirGreen Tip: No matter how good the machine is, a poor installation cancels out all its benefits. Work with a certified, experienced team like ours, trusted throughout Montreal, Laval, and the South Shore.
The real benefits of a successful multi-zone installation with AirGreen
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Personalized comfort in each room with independent units.
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Significant energy savings thanks to high-performance inverter compressors.
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Rebate eligibility through programs like Hydro-Québec’s LogisVert (up to $5,000 for high-efficiency multi-zone systems).
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Sleek aesthetics: concealed piping, discreet indoor units.
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Simplified maintenance: we offer HVAC maintenance contracts tailored to your system.
How to avoid these costly mistakes?
Step 1: Free technical assessment
We offer free in-home visits, including a full building analysis, heat load calculations, and an optimized configuration proposal.
Step 2: Choosing the right system
We work with proven brands like Fujitsu, Gree, Bosch, Goodman, all ENERGY STAR certified, suitable for Quebec’s harsh climate.
Step 3: Installation by certified technicians
Our team is trained in CSA standards, refrigerant handling for R-32 and R-454B, and complex multi-zone configurations (up to 5 indoor units).
Step 4: Impeccable after-sales service
With our regular HVAC maintenance service, you avoid unexpected breakdowns and extend the life of your heat pump.
Conclusion: Peace of mind starts with the right choice
At AirGreen, our mission is to help you avoid the costly mistakes tied to choosing and installing your multi-zone heat pump. Thanks to our personalized approach, technical precision, and transparency, we’ve earned the trust of hundreds of families and property owners across Montreal, Laval, Longueuil, the North Shore and the South Shore.
If you're considering a multi-zone installation or want to verify the quality of your existing system, reach out to our team today.