A tailored air conditioning solution for a historic building in the heart of Montreal
At AirGreen, every project is a new opportunity to put our expertise to work for residential comfort—even in the most challenging buildings. Recently, we tackled a major challenge: modernizing the cooling system of an old duplex located in a historic Montreal neighborhood, without altering the structure or aesthetics of the building. Thanks to the installation of a Gree wall-mounted air conditioner, we not only met the client’s needs but also improved the home’s energy efficiency.
A typical Montreal building, with its technical constraints
This century-old duplex located in the Plateau-Mont-Royal borough came with several challenges typical of older buildings:
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Outdated thermal insulation
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No infrastructure for a central system
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Limited space for indoor units
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Thick load-bearing walls limiting drilling
Our client was looking for a discreet, efficient, and affordable air conditioning solution capable of covering both floors of the home without requiring major renovations.
The strategic choice: a Gree Lomo 18,000 BTU wall-mounted air conditioner
After a detailed inspection and an in-depth conversation with the client, we chose to install a Gree Lomo 18,000 BTU wall-mounted air conditioner. This model met all the project’s criteria:
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18,000 BTU capacity: ideal for cooling two floors of approximately 1,000 square feet each.
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Inverter technology: reduces electricity consumption and enhances comfort.
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Very low noise level: essential for a quiet residential environment.
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Sleek and compact design: blends seamlessly into living spaces.
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Energy class A++: eligible for Hydro-Québec’s LogisVert program.
A flawless HVAC installation, despite a complex setting
The project was completed in two full days of work, with a team of two technicians specialized in residential HVAC installation in Montreal.
Steps of the intervention:
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Structural inspection: analysis of walls, existing ducts, room orientation.
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Strategic positioning of the wall unit: in the duplex’s central staircase, to maximize airflow across both floors.
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Installation of the outdoor unit: mounted on an anti-vibration wall bracket in the backyard, with optimized clearance.
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Minimal and clean drilling: refrigerant lines passed through with a professional finish that respects heritage standards.
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Electrical connection by our certified master electrician: ensuring full compliance and safety.
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Performance testing, airflow balancing, and personalized user instructions provided to the client.
The results: optimal comfort and long-term savings
Just hours after activation, our client already noticed a rapid drop in indoor temperature, even on a scorching day. The system provided an even distribution of air, with no unpleasant drafts or excessive noise.
Observed benefits:
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Significant reduction in ambient heat on both the ground floor and upstairs
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Measured energy consumption: the first Hydro-Québec bills confirm the unit’s efficiency
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Non-intrusive installation, preserving the building’s visual integrity
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Eligibility for a $1,704 LogisVert grant thanks to energy efficiency
Client testimonial
“I never would’ve believed that a simple wall-mounted air conditioner could so dramatically transform the comfort of my old duplex. The AirGreen team was incredibly professional, from assessment to installation.”
Why this project showcases AirGreen’s unique expertise
At AirGreen, we don’t offer generic solutions. Every wall-mounted air conditioner installation in Montreal, Laval or the South Shore is custom-designed, considering the building type, living habits, structure, and the client’s budget.
This project is a perfect example of our approach:
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In-depth technical assessment
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Smart equipment selection
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Clean and fast execution
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Flawless customer service
And most importantly, we deliver lasting value, by ensuring energy performance, HVAC system longevity, and complete customer satisfaction.
What you should know if you live in an older building in Montreal
Practical tips:
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Don’t wait for peak summer: installation delays increase during high season.
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Have your energy use assessed: a well-chosen wall unit can be more economical than a central system.
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Check your grant eligibility: high-performance models like the Gree Lomo are often partially reimbursed.
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Choose a company specialized in old buildings and delicate renovations.
What AirGreen can do for you:
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Personalized home assessment
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Recommendation of suitable equipment
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Fast, professional installation
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Access to grants and help with paperwork
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Preventive maintenance and long-term support
Conclusion: a simple project that demonstrates AirGreen excellence
With the installation of this Gree 18,000 BTU wall-mounted air conditioner in a historic duplex in Plateau-Mont-Royal, we proved that it’s possible to combine modern comfort and respect for heritage. At AirGreen, every project is a chance to raise the standards of residential HVAC installation in Montreal, Laval, Longueuil, the North Shore, and the South Shore.
Contact us today for a free quote and discover how we can transform your comfort, one room at a time.