The performance of an HVAC system often depends on the quality of the installation, but also on how well it suits the thermal characteristics of the home. In Longueuil, a family reached out to AirGreen with a recurring issue: they couldn’t maintain indoor comfort during winter due to poor insulation. Here’s the full story of how a wall-mounted heat pump installation transformed their home, thanks to our expertise and the right equipment.
A hard-to-heat home: a challenge we took on
Located in a residential neighborhood of Longueuil, the house had major insulation deficiencies in the walls and windows. The owners complained about constant drafts, cold rooms despite a central electric heating system, and high electricity bills.
After a comprehensive HVAC assessment by our team, we identified several zones with thermal loss. The challenge? To deliver an effective heating solution, one that could be installed quickly and qualify for government grants, despite the home’s weak thermal envelope.
Our solution: a high-performance wall-mounted heat pump
To meet the family’s needs, we recommended installing a Gree Sapphire 18,000 BTU wall-mounted heat pump, a unit known for its cold-climate efficiency, low energy consumption, and its ability to maintain a stable indoor temperature—even under extreme conditions.
Why the Gree Sapphire model?
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Heating capacity down to -30 °C, ideal for the harsh winters of the Greater Montréal Area
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Inverter technology for continuous, energy-efficient operation
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Ultra-low noise level, perfect for family homes
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Eligible for Hydro-Québec’s LogisVert program with a $1,704 grant
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Advanced air filtration, improving indoor air quality
Key steps in the Longueuil installation
Technical inspection and personalized quote
Our certified HVAC technicians started with a detailed analysis of the home’s structure: room orientation, wall condition, best spots for the indoor and outdoor units. We paid special attention to the coldest rooms, particularly a north-facing living room and two upstairs bedrooms poorly served by central heating.
Work completed in a single day
Despite the added complexity due to poor insulation, our team completed the entire HVAC installation in just one day:
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Clean and sealed drilling through exterior walls
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Secure wall mounting of the indoor unit in the living room, near the bedrooms to maximize warm air distribution
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Careful outdoor unit setup on anti-vibration mounts
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System start-up, configuration, and a full walkthrough with the customer on operation, maintenance, and seasonal adjustments
Immediate results: restored comfort and energy savings
Within days of the installation, the family noticed:
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A significant increase in indoor temperature, even with outdoor temperatures hitting -25 °C
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Total elimination of drafts in the previously problematic rooms
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A 30% drop in electricity use compared to the previous winter
The Gree wall-mounted heat pump not only offset the home’s insulation issues—it also drastically improved overall comfort, year-round.
Pro tips for poorly insulated homes
At AirGreen, we know that many older homes in Longueuil struggle with insulation. Here’s our advice to get the most out of a wall-mounted heat pump in this type of setting:
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Choose a unit made for Québec’s climate, with strong performance at very low temperatures
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Install the heat pump in the most strategic room, usually the one most used or hardest to heat
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Avoid under-sizing the unit. A properly sized system is key to maintaining comfort without overworking the equipment
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Long-term, consider improving insulation where possible to enhance system efficiency
Why choose AirGreen for your Longueuil project?
We stand out not only for the quality of the equipment we install, but above all for our human, thorough, and local approach. We serve the entire South Shore, especially Longueuil, with deep knowledge of the area’s architectural nuances.
Working with AirGreen means:
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Certified technicians specialized in wall-mounted heat pump installation
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Tailored recommendations, based on your home’s layout
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Full support to access available grants, like LogisVert or Rénoclimat
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Fast, clean, guaranteed installation
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Reliable after-sales service and practical maintenance advice
Customer testimonial: a successful transformation
"We were discouraged by how cold our home stayed every winter. After calling AirGreen, everything changed. The team was professional from start to finish. You feel the difference right away. Even our kids sleep better now." — The G. family, Longueuil
Feedback like this motivates us every day to keep fulfilling our mission: offering our clients adapted, long-lasting HVAC solutions throughout the Greater Montréal Area.
Conclusion: a successful HVAC installation—even in the worst conditions
This Longueuil project proves that with the right unit, a professional assessment, and a flawless installation, it’s absolutely possible to restore optimal indoor comfort, even in a poorly insulated home.
Are you facing a similar situation in Longueuil, Laval, Montréal, or on the South or North Shore? Reach out to AirGreen for an HVAC consultation and a solution that will change your daily life—winter or summer.