A major energy transformation in the heart of Montreal thanks to a multizone heat pump installed by AirGreen
In a quiet residential area of the Rosemont neighbourhood in Montreal, a homeowner was facing a situation many locals will recognize: a multi-storey house with uneven heating, an energy-hungry electric heating system, and a yearly electricity bill nearing $5,000. With winter approaching, it was urgent to find a more energy-efficient HVAC solution, better suited to the home’s layout and eligible for government grants.
This is where AirGreen stepped in with a custom solution: the installation of a Fujitsu AIRSTAGE KX multizone heat pump of the latest generation, paired with high-efficiency wall-mounted indoor units. This project, designed, executed, and optimized by our certified team, allowed this client to save almost $3,000 per year, while significantly improving comfort across every zone of the home.
Why is a multizone heat pump ideal for multi-storey homes in Montreal?
Montreal homes, often spread across multiple floors, pose a major challenge when it comes to temperature distribution. Central systems or traditional electric baseboards don’t allow for individual temperature control per room, leading to both discomfort and overconsumption.
The multizone heat pump emerges as a highly effective HVAC solution. In this specific case, the client had an open-concept living room, three bedrooms upstairs, and a basement office. We proposed a 5-zone configuration: one Fujitsu AIRSTAGE KX36 outdoor unit paired with five 12,000 BTU LMAS high wall indoor units, enabling independent control of each space.
Technical details of the installation completed in Rosemont
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Heat pump brand: Fujitsu
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Outdoor unit model: AIRSTAGE KX36 (36,000 BTU)
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Indoor units: 5 x LMAS 12K BTU wall-mounted units
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Refrigerant used: R-32, more environmentally friendly
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Estimated savings: $3,000 per year in energy costs
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Grant eligibility: Yes, LogisVert (Hydro-Québec) + Chauffez Vert (Transition énergétique Québec)
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Warranty: 12 years on parts and compressor
Challenges encountered and our custom approach
One of the main challenges of this installation was discreetly routing the refrigerant lines without compromising the home's exterior appearance. Given the house was over 100 years old, it was also essential to avoid invasive drilling and preserve the original architecture.
Our team:
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Installed custom-painted insulated conduits to match the exterior cladding.
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Used acoustic-decoupling wall mounts to prevent vibration.
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Adapted the placement of the indoor units to optimize airflow in rooms with sloped ceilings.
In just three days of work, the entire system was operational, tested, and fine-tuned for the cold season.
Client testimonial: finally, a comfortable winter
“Before, the bedrooms were freezing in winter and stifling in summer. Now, we adjust each room to our needs. On top of that, we received over $5,500 in grants and our monthly Hydro payments dropped. Thanks to the AirGreen team for their professionalism!”
This feedback confirms what we regularly observe: a well-planned multizone heat pump installation radically transforms the residential experience.
Grants available for this type of project
Here’s a summary of the grants received by this Montreal client, also available to other homeowners in Montreal, Laval, Longueuil, the North Shore, and the South Shore:
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LogisVert Hydro-Québec: up to $2,800 for certified multizone system installation
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Chauffez Vert: up to $5,000 for replacing oil or electric heating
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Rénoclimat tax credit: variable based on energy performance improvements (about $600 in this case)
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Total grants received: $5,600
Why choose AirGreen for your multizone installation?
At AirGreen, we don’t just sell products — we design complete HVAC solutions tailored to each home, its structure, thermal needs, and the lifestyle of its occupants. Our installers are TEQ-certified, fully familiar with the challenges specific to Greater Montreal, and we handle the entire grant application process for you, at no extra cost.
Tips for a successful multizone heat pump project
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Accurately assess your needs: each room has its own specifics (size, sunlight, insulation).
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Choose a certified installer: installation quality determines 80% of system performance.
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Optimize for grants: some models are specifically eligible.
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Prioritize R-32: more efficient and environmentally friendly than older refrigerants.
Tailored comfort, tangible savings
Thanks to this Fujitsu multizone heat pump installation in Montreal, our client now enjoys:
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Consistent thermal comfort, year-round.
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A 60% reduction in annual energy bills.
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An eco-friendly, quiet, and durable system.
This project reflects our mission: to provide every family in Greater Montreal with a reliable, economical, and ecological HVAC solution, while maximizing available government incentives.