An HVAC engineering challenge at height: when AirGreen installs a wall-mounted air conditioner at the top of a residential tower
In the world of residential HVAC in Montreal, some installations stand out not only for their technical complexity but also for how they showcase our expertise. At AirGreen, we recently took on an extraordinary challenge: installing a 12,000 BTU GREE LOMO wall-mounted air conditioner on the 20th floor of a residential tower in downtown Montreal. Let’s look back at this exceptional project that tested our know-how, creativity, and ability to deliver a safe and long-lasting installation in a highly complex environment.
The context: a demanding client, a residential tower, and an urgent need for comfort
Our client, living in a high-rise in the heart of Montreal, was looking for a quiet, efficient cooling solution that could be installed quickly before the peak summer heat. The building, constructed around fifteen years ago, had no centralized infrastructure for individual air conditioning, and the condo association rules were very strict regarding exterior modifications.
Additionally, the unit was located on the 20th floor, making any outdoor operation extremely tricky. What might seem like a standard wall-mounted installation became a major logistical, technical, and regulatory challenge.
Equipment choice: 12,000 BTU GREE LOMO wall-mounted air conditioner
We recommended the installation of a 12,000 BTU GREE LOMO wall-mounted air conditioner, a model known for:
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Its high energy efficiency (SEER of 22).
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Its quiet operation indoors and out.
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Its compact size, ideal for limited spaces.
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Its compliance with Montreal condo building restrictions.
This model is also eligible for Hydro-Québec’s LogisVert grants, an option we carefully validated with the client.
Step 1: technical validation with building management
Before we could even consider the installation, our team conducted a compliance analysis with the condo association regulations. We prepared a comprehensive file including:
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Installation diagrams.
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Technical specs for the wall-mounted unit.
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A work plan to minimize disruption to other residents.
We also secured authorization to access the roof and technical shafts, working closely with the building manager.
Step 2: logistics and safety for a high-rise installation
Installing a wall-mounted air conditioner on the 20th floor requires extremely strict safety protocols. We assembled a specialized team made up of:
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Two certified high-rise technicians.
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An on-site safety supervisor.
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A master electrician for dedicated power supply.
We used a mobile telescopic crane to hoist the outdoor unit up to roof level. Once on site, our technicians secured the unit to a concrete equipment slab using specially designed anti-vibration mounts.
Step 3: drilling and running the lines with precision
For a project like this, drilling through the concrete slab between the indoor and outdoor units is a critical step. We used diamond core bits and water-fed drills to reduce dust and avoid any risk of cracking. Each hole was perfectly insulated with heat-resistant conduits.
The refrigerant and drain lines were routed discreetly through an existing technical shaft. We took care to install an ideal slope to ensure proper gravity drainage of condensate, avoiding any backflow or overflow.
Step 4: indoor installation in a modern condo
The indoor unit was installed in a high-end condo with a sleek, minimalist design, requiring a seamless and discreet approach. We selected a strategic location, away from windows and direct heat sources, to ensure optimal airflow throughout the room.
All wiring was hidden in decorative conduits matching the wall color, and the unit was mounted on sound-insulating brackets to ensure ultra-quiet operation.
Step 5: commissioning, testing, and client satisfaction
Once the installation was complete, we carried out a full commissioning, including:
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Pressure testing with nitrogen.
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Vacuuming the refrigerant lines.
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Leak detection and verification.
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Temperature calibration.
We then took the time to train the client on how to use the new wall-mounted heat pump, explaining all the operating modes, programming options, and recommended maintenance procedures.
The client praised our cleanliness, punctuality, and professionalism, reinforcing our ongoing commitment to customer satisfaction.
Technical challenges encountered and the solutions we implemented
Challenge 1: Vertical access
Solution: Use of a telescopic crane with a lift plan approved by the City of Montreal.
Challenge 2: Noise impact on other residents
Solution: Quiet equipment, anti-vibration mounts, strategic orientation.
Challenge 3: Compliance with condo rules
Solution: Complete technical submission, strict adherence to installation policies.
What this installation reveals about AirGreen’s expertise
This project clearly demonstrates our ability to perform under the most complex conditions while upholding exceptional standards of quality and safety. This type of installation can only be done by a team that is:
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Experienced in residential HVAC in Montreal.
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Certified for high-rise work and refrigerant handling.
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Capable of coordinating multiple trades.
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Detail-oriented and committed to client satisfaction.
Our recommendations for high-rise HVAC installations
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Never improvise. A detailed technical study is essential.
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Work with recognized professionals like AirGreen to avoid costly mistakes.
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Choose compact, quiet, energy-efficient equipment.
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Review condo rules thoroughly before making any decisions.
Why choose AirGreen for your HVAC project in Montreal and surrounding areas?
With a well-established reputation for handling complex installations across Montreal, Laval, Longueuil, the North Shore and South Shore, we’re your trusted partner for all things wall-mounted air conditioning, heat pumps, HVAC maintenance, and energy efficiency. Every project is an opportunity for us to showcase our dedication to excellence, safety, and customer care.
Contact us for a custom quote
If you're considering a high-rise HVAC installation or working in a complex environment, our team is ready for the challenge. Reach out to AirGreen today for expert advice, personalized support, and flawless service.