When Wall-Mounted Heat Pumps Become the Ideal Solution for a Century-Old Home
In the heart of one of Montreal’s historic residential neighborhoods, a family recently moved into an old home was looking for an efficient way to modernize their heating and cooling system—without compromising the charm of their property. Thanks to AirGreen, a leader in ductless wall-mounted heat pump installation, this family successfully transformed their thermal comfort while significantly reducing their energy costs.
An Old Home, with Modern Challenges
Older homes in Montreal, while rich in character, often present serious challenges when upgrading HVAC systems. This particular house, built in the 1930s, had no central ventilation or ductwork, making the addition of a traditional system extremely complex and costly. The family was seeking a solution that would be discreet, efficient, and most importantly, affordable.
After a full assessment by our team, the ductless wall-mounted heat pump stood out as the perfect option. This technology allows for quick installation without altering the structure of the building and offers precise climate control on a room-by-room basis.
Case Study: Installation of Three Wall Units in a Two-Story Home
Location: Plateau-Mont-Royal, Montreal
Installed Product: MIDEA 12,000 BTU Wall-Mounted Heat Pumps (Model MIDEA22)
Number of Units: Three indoor units + one outdoor compressor
Work Duration: 1 day
Applicable Grant: Hydro-Québec LogisVert Program – $1,704 grant obtained
The installation included:
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One unit in the main floor living room
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One unit in the master bedroom upstairs
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One unit in the office located in the former sunroom
Each unit was installed high on the wall to optimize airflow for heating and cooling without interfering with living space. The compressor was mounted on an anti-vibration platform at the back of the house, discreetly positioned out of sight.
Real Everyday Benefits
Since the installation, the family has seen a more than 30% reduction in their energy bill compared to their old electric baseboard heating system. The MIDEA system now allows them to control each wall unit independently, based on room usage and time of day.
The main benefits of their new system include:
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Whisper-quiet operation
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Remote control and smartphone app functionality
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High energy efficiency (SEER 21 / HSPF 11)
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Minimal maintenance required
Why Choose a Ductless Wall-Mounted Heat Pump for an Older Home?
Ductless heat pumps are especially well-suited for homes without existing ductwork—common across Montreal, Laval, Longueuil, and the North Shore and South Shore.
Key Advantages:
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Non-invasive installation: No major construction or demolition needed.
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Design flexibility: Equip each room based on its specific needs.
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Improved energy efficiency: No heat loss through central distribution.
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Grant eligibility: Including the Hydro-Québec LogisVert program.
Expertise by AirGreen
At AirGreen, we know that every home is unique. That’s why our experts always perform a custom thermal analysis, taking into account:
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existing insulation,
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sun exposure,
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lifestyle habits,
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and architectural configuration.
For this Plateau-Mont-Royal installation, we had to:
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Adapt wall brackets for structural walls typical of old homes,
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Use custom trunking to conceal piping,
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Install a gravity-fed drainage system to avoid using a condensate pump.
The result? Seamless aesthetics and exceptional HVAC performance.
Practical Tips from AirGreen for Older Homes
Do:
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Request an energy assessment before any HVAC project
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Choose ultra-quiet units (< 21 dB)
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Check your eligibility for provincial grants
Don’t:
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Install an oversized unit: this causes short cycles and shortens the system’s lifespan
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Drill without a plan: old houses may have fragile hidden materials
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Skip maintenance: even without ducts, a wall-mounted heat pump needs annual cleaning
Year-Round Comfort for the Whole Family
By choosing AirGreen, this Montreal family gained a complete HVAC solution adapted to their home and their budget. Comfort is now optimal year-round thanks to a system that is eco-friendly, quiet, and highly efficient.
We’re proud to have contributed to their quality of life while preserving the architectural integrity of their heritage home.
Do you live in an older home in Montreal, Laval, or on the South Shore and need an effective heating and cooling solution?
At AirGreen, we support you at every step of your project—from product selection to installation and ongoing maintenance. Contact us today for a free assessment and discover how a ductless wall-mounted heat pump can transform your everyday comfort.