Installation of a Gree (R-32 range) wall-mounted heat pump in Sainte-Dorothée, Laval

A residential project optimized for four-season comfort

In the peaceful Sainte-Dorothée area of ​​Laval , we installed a new-generation Gree wall-mounted heat pump using R-32 refrigerant . Our client wanted a discreet HVAC system that would be efficient in cooling in the summer and efficient in heating in the winter, while controlling its electricity consumption. The choice of a Gree Eco-Inverter was obvious due to its temperature stability, reliability, and ease of maintenance.

Home context and client objectives

Newer single-family brick home with paved backyard, nearby basement window and raised vegetable garden . Owner's priorities:

• Constant comfort in the main living area on the ground floor;

• Minimal noise to enjoy the terrace;

• Clean installation that respects the clearances around the window and the passage;

• Prepare the house for Laval winters (snow, frost, winds).

Technical choice: Gree R-32, efficiency and peace of mind

The Gree brand has distinguished itself with its R-32 series (Clivia, Airy, Vireo, Sapphire, etc.) known for:

• Wide-range modulating inverter compression : the device precisely adapts its power, reducing on/off cycles and lowering the electricity bill ;

• R-32 : better heat transfer and reduced load compared to R-410A;

• Quiet operation both indoors and outdoors;

• Low temperature performance suitable for Greater Montreal (reliable heating around −25°C depending on the series and capacity).

The sizing chosen by our team, after calculating the loads, aims for a comfortable airflow for a typical open-plan living room/kitchen. The capacity/volume ratio was chosen to allow for smooth modulation , avoid air gusts and maximize the SEER/HSPF .

Outdoor installation: precision, clearances and longevity

The outdoor unit is placed on galvanized wall brackets with anti-vibration pads , at a height calculated for:

• stay above snow accumulation ;

• ensure gravity flow of condensate through the dedicated line towards the garden area (far from the slab to avoid freezing);

• clear the way and make it easier to maintain the vegetable garden.

We have :

• made a sealed and insulated hole directly behind the unit to shorten the refrigeration path ;

• respected the clearances at openings (basement window) and at the fence, in order to preserve the suction and discharge of air;

• oriented the device to minimize the blast towards the terrace and reduce acoustic reverberation on the brick wall;

• left a service space at the front for seasonal maintenance and measurement/diagnostic operations.

The refrigeration connections are short and straight (approximately 4 to 6 linear meters between the indoor head and the condenser), limiting pressure losses and promoting efficiency. The power wiring is protected; the dedicated circuit breaker and the outdoor disconnector comply with current standards.

Interior integration: comfort, airflow and silence

The interior head was positioned to sweep the main area without blowing directly onto the occupants. We have:

• validated the air intake clear of any obstacles (curtains, high furniture);

• calibrated the shutter angle to avoid micro-currents ;

• optimized the installation height to improve air mixing and reduce temperature gradients between ceiling and floor.

The result is consistent comfort : a stable temperature, better controlled humidity in summer and a gradual increase in heat in heating mode, a guarantee of savings and well-being.

Execution details that make the difference

• Crimping, soldering and vacuum drawing according to the rules of the art; leak testing with nitrogen.

• Refrigeration load adjusted according to the actual length of the lines.

• 100% gravity-fed condensate management (increased reliability, zero pumps).

• Finish : harmonized capping and discreet path at the rear of the unit; no hindrance to the maintenance of the wall and the vegetable garden.

• Commissioning with complete verification (current, pressures, superheat/subcooling, defrost test).

Grants and Eligibility

Gree R-32 high-efficiency wall-mounted heat pumps may be eligible for provincial/municipal grant programs depending on the series and certified performance. We assist our customers in Montreal, Laval, Longueuil, the North Shore, and the South Shore to verify eligibility, prepare the application, and maximize available financial assistance .

HVAC Use and Maintenance Tips

To protect investment and maintain returns:

• Keep 60 to 90 cm free in front of the exterior blower grille; keep away any containers, trellises or invasive plants;

• Clean the inner head filters every 4 to 8 weeks during peak usage;

• Clear snow in winter and check that the drain remains free;

• Schedule annual HVAC maintenance : inspection of connections, washing of coils, verification of refrigeration parameters and the inverter board.

Pitfalls to avoid (AirGreen feedback)

• Unit too low : exposure to snow drifts and splashes;

• Insufficient clearances in front of a fence or garden wall → loss of capacity and more frequent frost;

• Drain directed toward the slab : ice and stains; drainage to a gravel/garden bed is preferred;

• Oversizing : short cycles, discomfort, and overconsumption. Our load calculations avoid these pitfalls.

Benefits observed after installation

• Responsive air conditioning of living rooms during heat waves in Laval;

• Economical supplementary heating during the off-season, reducing the use of the main system;

• Very low outside noise : evenings on the terrace remain pleasant;

• Optimized energy bill thanks to modulation and R-32.

Why entrust us with your HVAC installation in Laval and Greater Montreal?

At AirGreen , we combine rigorous sizing , careful implementation and responsive after-sales service . Our teams respond quickly in Laval, Montreal, Longueuil, North Shore and South Shore for wall-mounted , multi-zone and central heat pump projects. We provide:

• the design and selection of equipment adapted to your home;

• HVAC installation according to best practices;

• preventive HVAC maintenance to maintain performance over time;

• grant support from the first call to payment.

Conclusion: a durable, discreet and efficient installation in Sainte-Dorothée

This Gree R-32 wall-mounted heat pump delivered to Sainte-Dorothée, Laval, illustrates our approach: measured performance, intelligent installation , clean finishes and clear advice to ensure the system remains efficient year after year. The owner now enjoys four-season comfort with controlled consumption and an installation ready to face the winters of Greater Montreal .