An energy renovation serving both comfort and efficiency
In the Plateau-Mont-Royal borough of Montréal, a century-old home typical of the city's urban architecture recently underwent a true thermal revolution. This modernization project didn’t just breathe new life into the home—it completely transformed its indoor comfort thanks to the installation of a state-of-the-art multi-zone heat pump by the AirGreen team. This type of installation, particularly well-suited for older homes with complex layouts, is the ideal solution for homeowners looking to combine energy performance with visual harmony.
Why choose a multi-zone heat pump for an old Montréal home?
Older homes, like our client’s property on Fabre Street, present several challenges: load-bearing walls, high ceilings, original flooring, lack of ductwork, and often insufficient insulation. In this context, a multi-zone heat pump stands out as a flexible and highly effective alternative.
Unlike central systems that require ductwork, a multi-zone heat pump allows for independent heating and cooling of multiple rooms, with individual wall-mounted or discreet indoor units in each targeted zone. For this project, AirGreen selected a Fujitsu brand multi-zone system, model AOU36RLXFZ, paired with three indoor wall units: KWL09, KWL12, and KWL18, all operating with R-32 refrigerant for a lower environmental impact.
Technical details of the installed equipment
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Brand: Fujitsu
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Outdoor unit model: AOU36RLXFZ
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Indoor unit 1: KWL09 (9,000 BTU – master bedroom)
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Indoor unit 2: KWL12 (12,000 BTU – living room)
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Indoor unit 3: KWL18 (18,000 BTU – dining room open to kitchen)
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Refrigerant: R-32, eco-friendly
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Energy efficiency: SEER above 20, high HSPF
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Eligible grants: Yes, up to $2,500 via Hydro-Québec’s LogisVert program
Challenges faced and AirGreen’s solutions
The main technical challenge was integrating the indoor units without altering the home’s original aesthetic. Thanks to our expertise, the refrigerant lines were concealed inside existing closets and crown moldings, minimizing visual impact.
The outdoor unit was installed in the backyard, mounted on an elevated anti-vibration base, ensuring noise reduction for neighboring properties. Additionally, the electrical wiring was upgraded to meet the highest standards, with a dedicated breaker added to the main panel.
A fast, professional, and long-lasting installation
The work was completed over three days, including mounting the wall brackets, running the refrigerant lines, electrical connections, commissioning, and a full performance test. At AirGreen, we take the time to ensure every step of the installation is done right, guaranteeing not only immediate operation but also long-term system durability.
Our team also supported the client through the grant application process with Hydro-Québec, providing all required documentation: proof of purchase, installation certificate, proof of residence, and photos.
Results: immediate comfort and long-term savings
From the moment the system was turned on, our client noticed a dramatic improvement in thermal comfort, especially during cooler autumn evenings. Thanks to inverter technology and independent control for each unit, the home now remains consistently comfortable, without wasting energy.
Based on our estimates, the client will see between 25% and 35% savings on their annual energy bills, having replaced outdated and inefficient electric baseboards.
Why trust AirGreen for your multi-zone heat pump project?
At AirGreen, we understand the specific characteristics of homes in Montréal, Laval, Longueuil, as well as properties located on the North and South Shores. We never offer one-size-fits-all solutions: every project undergoes a personalized analysis, based on the home’s layout, the client’s habits, and their energy goals.
Our team is certified, meticulous, punctual, and above all, passionate about solving technical challenges. By choosing AirGreen, you benefit from full support—from selecting the right HVAC system to professional commissioning, and reliable after-sales service.
Other similar projects completed by AirGreen
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Gree multi-zone heat pump in Laval (Two-storey home, 4 indoor units)
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Fujitsu wall-mounted system in Longueuil (Triplex converted into a condo)
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Haxxair multi-zone air conditioning in Saint-Eustache (Renovated 1950s home)
These projects highlight our ability to adapt multi-zone systems to the complex realities of Québec’s housing stock, while maximizing available grant opportunities.
Practical advice for owners of older homes
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Have your insulation checked before any HVAC installation. A heat pump performs better in a well-insulated home.
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Avoid oversized units. Mismatched capacity leads to discomfort and higher costs.
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Choose reputable brands for reliability and compliance with local energy standards.
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Work with a local company, like AirGreen, who understands your neighborhood’s architectural and regulatory specifics.
Conclusion: modernizing without compromising character
This multi-zone heat pump installation in a century-old Plateau home perfectly illustrates AirGreen’s mission: to deliver high-performance HVAC solutions tailored to the architectural heritage of our region. Thanks to our thorough, personalized, and respectful approach, we help homeowners combine modern comfort with timeless charm.