Efficiency in extreme cold: a careful installation that protects performance… and peace of mind
At AirGreen , we take care of every HVAC installation so that the heat pump delivers comfort in both summer and winter, without excessive noise or loss of efficiency. This project in Sainte-Dorothée illustrates our method: thoughtful placement, high snow supports, clean finishes, and impeccable electrical compliance.
Home Context and Goals
Single-family brick house with garden-level windows and a paved driveway. The client wanted:
-
efficient heating even in the typical cold of Laval;
-
stable cooling in summer;
-
discreet operation near a hedge;
-
a durable installation that avoids problems with frost, defrost water and noise.
Technical choice: GREE wall-mounted heat pump (R-32 refrigerant)
We are installing a new-generation GREE R-32 outdoor unit paired with an indoor wall-mounted unit. This choice meets three priorities:
-
High seasonal efficiency to reduce electricity bill;
-
Operation in extreme cold (service ranges adapted to the climate of Greater Montreal, down to marked negative temperatures depending on the range);
-
Compact and low noise , ideal for suburban residential environments.
Model: The equipment belongs to a recent R-32 range from GREE . When the exact reference is not required by the customer, we favor the range offering the best capacity/noise compromise for the room served.
Outdoor installation: winter performance a priority
-
Raised galvanized aluminum supports , anchored in the paving: keep the condenser above the snow level and facilitate the flow of defrost water.
-
Clearances respected on all sides for air intake and blowing.
-
Orientation chosen to limit air recycling and gusts; the neighboring hedge serves as a screen against the wind without hindering the flow.
-
Vibration insulation under the support points to maintain silence inside.
-
Frost and water management : the area under the unit is clear; in the event of exceptional accumulation, simple manual maintenance is sufficient to keep the area free.
Refrigeration holes and connections: cleanliness and durability
-
Most direct route between the indoor head and the outdoor unit: a clean bore through the brick with a waterproof sleeve .
-
New refrigeration lines with high-density continuous insulation; discreet exterior capping (pale tone close to the color of the appliance) for a clean finish and UV protection .
-
Estimated length 3 to 5 meters, perfectly within the recommended load and pressure drop tolerances.
-
Drainage : the indoor head is gravity-fed towards the outside; the outdoor unit manages defrosting by free flow under the supports.
Power supply and compliance
-
Dedicated circuit from the main panel (240 V), rating and circuit breaker compliant with the heat pump loads.
-
Disconnect box installed near the condenser for maintenance safety.
-
Cable routing protected in conduit; sealing of the crossings to prevent infiltration of air or moisture.
Interior: targeted comfort and silence
-
Head position chosen for uniform airflow and stable comfort without direct air currents on the occupants.
-
Initial settings : flow calibration, seasonal settings, night-time savings programming.
-
Reduced noise level thanks to external anti-vibration pads and precise alignment of the support.
Results measured at the customer
-
Rapid temperature rise during cold weather testing, without short cycles.
-
Controlled consumption in off-season heating mode; the existing electric auxiliary resistance remains a backup solution, rarely used.
-
Acoustic discretion appreciated on the facade and in the room served.
Preventive maintenance recommended by AirGreen
Regular maintenance maximizes lifespan and performance:
-
Clean the internal filters every 4 to 8 weeks during the season.
-
Annual inspection : pressure, temperatures, connections, tightening, condition of insulation, tank and drainage.
-
Winter : Keep the area under the unit free of snow and ice ; never obstruct the sides.
-
Spring : gentle washing of the external battery, checking of the capping and anchors.
Grants and eligibility (depending on configuration)
Recent high-efficiency wall-mounted heat pumps may be eligible for Quebec's efficiency programs when seasonal performance and low-temperature capacity maintenance criteria are met. We validate these points for each file and prepare supporting documents, if necessary.
Why AirGreen for your HVAC installation in Laval, Montreal, Longueuil, North Shore and South Shore?
-
Local expertise : teams accustomed to the climatic realities of Greater Montreal and winter requirements (snow, frost, winds).
-
Tailor-made approach : sizing by room, study of the route, aesthetic integration.
-
Installation quality : durable fixings, clean seals, careful wiring, complete testing.
-
After-sales service : maintenance reminders, seasonal checks, usage tips to optimize savings.
Points of attention for your project
-
Height and clearances : A condenser that is too low or too close to an obstacle loses efficiency and becomes covered in frost; raised supports are essential.
-
Drainage : anticipate the path of the defrosting water to avoid ice on the paths.
-
Noise : thoughtful installation and anti-vibration pads prevent structural resonances.
-
Aesthetics : well-placed capping and a suitable color blend in with the facade.
Next step
Whether you're in Montreal, Laval, Longueuil, on the North Shore or the South Shore , we quickly assess your home and recommend the most suitable GREE wall-mounted heat pump : BTU capacity, cold operating range, noise level and control options. Our team then plans a clean, safe and durable installation, just like in Sainte-Dorothée.
Meta usage tips
-
For heating: favor a stable setting rather than large day/night variations.
-
In air conditioning: use AUTO speed to keep humidity under control.
-
In winter: never cover the unit; clear snow around and under the support.
-
Before the heatwave: carry out spring cleaning to restore full heat exchange.
In Sainte-Dorothée, this installation highlights what makes the difference in residential HVAC : the method . A high-performance heat pump is first and foremost a smart installation, designed for Quebec's climate and for your daily life.
Need an estimate? We operate weekly in Laval , Montreal , Longueuil , as well as on the North Shore and South Shore . Our team guides you from choosing equipment to applying for grants, then ensures simple and efficient HVAC maintenance , year after year.