When professionalism meets technical precision: a deep dive into a residential HVAC installation by AirGreen
In the heart of the Greater Montréal area, where harsh winters and intense summer heatwaves are part of everyday life, the pursuit of year-round thermal comfort leads many homeowners to invest in wall-mounted heat pump systems. But beyond choosing a high-performance unit, the true determining factor of HVAC success lies in the quality of the installation. At AirGreen, we understand this better than anyone. This article takes you behind the scenes of a complete wall-mounted heat pump installation, from the initial client call to the final adjustments—including technical surprises and tailored solutions.
Initial assessment: understanding needs to deliver the right solution
Every project starts with a personalized on-site assessment. In this case, our client, the owner of a typical bungalow located in Laval, was looking for an energy-efficient solution to improve indoor air quality while reducing electricity bills. They wanted a wall-mounted unit that was quiet, reliable, and eligible for Hydro-Québec’s LogisVert grant.
Our HVAC evaluation team visited the site to carry out a complete thermal analysis of the home: sun exposure, insulation level, room layout, window positioning, and usage habits. These data points led us to determine that the best option was a Gree Lomo 18,000 BTU wall-mounted heat pump, a model known for its high energy efficiency, durability, and suitability for Québec’s climate conditions.
Choosing the unit: efficiency, comfort, and grant eligibility
Why did we go with the Gree Lomo 18,000 BTU? This model offers a Seasonal Energy Efficiency Ratio (SEER) of 21 and a Heating Seasonal Performance Factor (HSPF) of 10.5, placing it among the most efficient units in its class. It operates in temperatures as low as -25°C—an essential requirement for Montréal and surrounding areas.
Another key advantage: it is fully eligible for the LogisVert grant, allowing our client to receive $1,704 in financial assistance, significantly lowering the total cost of the installation.
Installation steps: precise planning from start to finish
Once the quote was approved and the unit selected, we scheduled the installation date, factoring in the client’s availability and weather conditions.
1. Site Preparation
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Marking the indoor and outdoor installation zones
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Protecting surrounding surfaces
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Verifying the electrical supply
2. Indoor Unit Installation
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Mounting the wall bracket to a load-bearing wall in the living room
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Discreetly creating an opening to the outside for refrigerant lines and the condensation drain
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Connecting pre-insulated copper tubing and electrical wiring
3. Outdoor Unit Installation
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Installing the base on a concrete slab with anti-vibration pads
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Connecting refrigerant lines and performing a nitrogen pressure test
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Leak check and vacuum purge to eliminate moisture
4. Start-up and Testing
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Thermostat calibration
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Functional testing in both heating and cooling modes
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Client orientation on basic maintenance and remote control use
A well-managed surprise: non-compliant electrical conduit
During the installation, our technicians discovered that the existing electrical wiring did not meet current safety standards. Rather than delay the project, our team responded immediately: we brought in one of our certified electrician partners to install a new dedicated electrical line from the main panel with a 20A circuit breaker.
This kind of responsiveness makes the difference between a standard install and an AirGreen installation, where every detail is under control.
The final result: comfort, efficiency, peace of mind
In under a day, the system was up and running. The client immediately noticed a significant drop in ambient noise (compared to their old electric baseboards), a more even distribution of heat throughout the rooms, and above all, an intuitive user interface that makes seasonal operation seamless.
Our technicians provided a detailed installation report, explained the annual maintenance required (including filter cleaning, drain and connection checks), and emphasized the importance of preventive HVAC maintenance to maximize system lifespan.
One installation among hundreds: the AirGreen experience in action
This project in Laval exemplifies our personalized approach and commitment to delivering high-quality HVAC service throughout Montréal, Longueuil, the North Shore, and the South Shore. Whether it’s a Gree, Fujitsu, Bosch, Tosot, or Lennox heat pump, every installation is an opportunity for our team to showcase their technical expertise, thoroughness, and client-first approach.
What to keep in mind before installing a wall-mounted heat pump
Practical tips before your HVAC installation:
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Always get a full thermal assessment of your home
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Verify grant eligibility (LogisVert, Rénoclimat…)
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Choose a certified installer with local experience
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Select a unit rated for Québec winters (performance at -25°C)
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Plan regular maintenance to prevent performance loss
Why choose AirGreen for your next HVAC installation?
Because we’re not just installers. We are thermal comfort experts, certified HVAC professionals, specialized in custom-fit installations for both residential and commercial projects across Greater Montréal.
Our promise: transparency, precision, energy savings, and long-term customer satisfaction.