Installation of a Goodman wall-mounted heat pump in Sainte-Rose (Laval)
In Sainte-Rose (Laval) , AirGreen installs a Goodman wall-mounted heat pump on brackets , with a cover and external cut-off . A clean, durable and efficient HVAC installation for four-season comfort in Greater Montreal .
In summer, the outdoor unit rejects the house's heat outside.
Generic illustration of this type of installation, not a survey of this job site. Tap a number.
Mounted level on a wall plate, high enough for the air to reach the whole room, with enough space around it to slide the filters out easily.
The refrigerant lines, the communication cable and the drain go through the wall in a single opening, sealed against water, cold air and insects.
Two insulated copper pipes connect the two units. Outside, a line cover can protect them from sun, knocks and weather.
A shut-off switch near the outdoor unit isolates it safely for service. It must stay accessible at all times.
The compressor and the fan. In heating mode it captures heat from the outdoor air, even in winter, and moves it inside.
On the ground or on the wall, it keeps the unit above accumulated snow. The unit stays clear and defrost water can drain away.
The fan needs to blow freely. Storage, a fence or a wall too close, and efficiency drops while noise goes up.
A neat upgrade on the front: wall bracket, straight cowling and exterior cut-off for reliable four-season performance
In Sainte-Rose (Laval) , a family hired us to modernize the comfort of a single-family home clad in vinyl siding . The need was clear: efficient supplemental heating in winter, quiet air conditioning in summer, and a clean integration on a facade visible from the driveway. We recommended a Goodman wall-mounted heat pump —a mini-split well-suited to North Shore residences—and we organized an HVAC installation that prioritized aesthetics, durability, and ease of maintenance.
Installation: why wall mounting is essential here
We install the outdoor unit on galvanized brackets mechanically fixed in the base masonry. This choice:
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Elevates the unit to protect it from splashes, mud and accumulated snow;
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Reduces the risk of premature corrosion ;
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Facilitates the flow of condensates and defrost cycles;
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Limits the transmission of vibrations to the floor and interior parts.
Each bracket is fitted with anti-vibration pads and the tightening torque is checked to avoid any resonance with the facing. The horizontality is checked at the level, which determines the proper lubrication of the compressor and the stability of the fan.
Connection path: clean and watertight vertical cover
The insulated refrigeration tubes and the communication cable are grouped behind a white vertical cover (capping) , placed straight between the vinyl slats. Advantages:
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Mechanical protection against impacts and sunlight;
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Sealing the drilling (fire-resistant foam and peripheral sealing);
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Simplified maintenance : clip-on covers allow quick access to flare fittings and insulators.
Inside and out, we maintain a sufficient radius of curvature to avoid points of pressure loss and refrigerant noise .
Power supply: service box and protected conduit
To the right of the unit, we install an exterior disconnect box , compliant with the electrical code, to quickly isolate the device during work. The power supply runs through a protected conduit and then enters the building through a sealed opening. This configuration:
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Secures operation in all weathers;
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Facilitates troubleshooting and seasonal checks;
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Maintains a clear reading of the electrical path, without messy visible cables.
Condensate and defrost management
In heating mode, the heat pump periodically enters defrost mode. On wall mount, we leave clearance under the unit for natural drainage and we avoid any direct obstruction under the tray. The precise leveling promotes drainage and prevents ice stalactites that could harm the fixings.
Sizing and expected results
The sizing takes into account losses (insulation, infiltration, orientation) and internal gains (occupancy, appliances). On this house:
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The capacity of the mini-split comfortably covers the main living area;
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Inverter modulation limits on/off cycles, reduces noise and stabilizes temperature;
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In summer, dehumidification improves the feeling of comfort at moderate settings;
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In the off-season and in mild winters, the heat pump significantly reduces the bill compared to baseboards or a simple convector.
Finishing touches: paying attention to visible details
The vinyl siding facade requires proper installation:
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Suitable stainless steel or galvanized screws ;
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Spacers to align the brackets despite the covering blade of the covering;
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Treatment of the piercing : reconstituted vapor barrier, insulation around the connections, waterproofing touch-up .
The result is visually discreet : centered device, straight cowling, aligned service box, with no floating cables or exposed insulation.
Recommended HVAC maintenance (cyclical and preventive)
To maintain performance:
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Periodic cleaning of the external exchanger (without bending the fins);
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Checking the fasteners , buffers and hood ;
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Control of currents and temperatures under load;
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Inspection of the drain and winter drainage path ;
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Updated the labeling on the service box.
Annual HVAC maintenance minimizes efficiency losses and extends equipment life.
Grants and Eligibility
High-performance wall-mounted heat pumps are often eligible for Quebec assistance programs when seasonal efficiency criteria are met and installation is carried out by a licensed contractor . Our team:
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Check eligibility based on home configuration;
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Provides the necessary documents (detailed invoice, serial numbers, technical sheets);
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Guides you through to filing the application.
Common mistakes avoided on this facade
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Too low installation exposed to snow accumulations: here, the ground clearance is sufficient for Laval winters.
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Undersized brackets : We chose a model with an admissible load greater than the weight of the unit, with margin for shear.
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Unsealed drilling behind capping: we seal before capping.
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Air recirculation due to a lateral obstacle: the unit is clear and centered between the downspout and the basement window.
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Forgetting the external cut-off : the service box is installed and identified.
Useful tips for owners in Laval, Montreal, Longueuil, North Shore and South Shore
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Clear the appliance before winter (leaves, objects, decorations).
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Leave 30 to 45 cm free around the sides and back for suction.
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Avoid spraying the unit directly with a high-pressure jet.
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If the coating is being renovated, plan the removal and reinstallation with us to preserve the integrity of the connections.
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Consider seismic mounting of the fixings if the facade receives impacts (ball, bicycle).
Why AirGreen for your HVAC installation in Laval and Greater Montreal?
Our approach combines thermal diagnostics , controlled field execution and after-sales service . We deliver a clear installation file : anchor photos, routing diagram, equipment references and maintenance reminders. By working on hundreds of homes in Laval, Montreal, Longueuil, North Shore and South Shore , we know how to adapt the installation to the realities of vinyl facades, masonry and Quebec winters.
Quick project sheet (Sainte-Rose)
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System : Goodman wall-mounted heat pump (residential mini-split).
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Support : galvanized wall brackets with anti-vibration pads.
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Path : white vertical cover ; sealed drilling; intact insulation.
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Electrical : outdoor disconnect box ; protected conduit.
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Comfort targeted : summer air conditioning, winter auxiliary heating, controlled consumption.
Naturally integrated keywords : heat pump , wall-mounted air conditioner , HVAC installation , HVAC maintenance , Montreal , Laval , Longueuil , North Shore , South Shore .
How it goes, from the first call to the end
The main steps of this kind of job at AirGreen. Every house has its quirks: the estimate brings them out.
We look at the room, the outside wall, the line route and where the outdoor unit will go. That is where the capacity gets chosen.
Model, capacity and price, in writing. We also check whether the model qualifies for assistance programs.
Floors and furniture protected, wall plate position marked level, wall opening located.
A single opening, with the slope the drain needs to flow outside.
Set on a stand raised above the snow, with the clearances the manufacturer requires.
Connected, insulated and protected. The opening is then sealed against water, cold air and insects.
A dedicated circuit and an accessible disconnect near the outdoor unit.
Leak test, vacuum, then start-up and a check of heating and cooling.
Remote, modes, filters: we show you the essentials before we leave.
- The on-site estimateWe look at the room, the outside wall, the line route and where the outdoor unit will go. That is where the capacity gets chosen.
- The quoteModel, capacity and price, in writing. We also check whether the model qualifies for assistance programs.
- Getting readyFloors and furniture protected, wall plate position marked level, wall opening located.
- The wall openingA single opening, with the slope the drain needs to flow outside.
- The outdoor unitSet on a stand raised above the snow, with the clearances the manufacturer requires.
- Lines, cable and drainConnected, insulated and protected. The opening is then sealed against water, cold air and insects.
- The electrical workA dedicated circuit and an accessible disconnect near the outdoor unit.
- Tests and start-upLeak test, vacuum, then start-up and a check of heating and cooling.
- The walkthroughRemote, modes, filters: we show you the essentials before we leave.
And at your place?
Two quick checks with real numbers: what heat costs, and what your current heaters add up to in BTU/h.
Conversion: 1 W = 3.412 BTU/h. An indication, not a load calculation: baseboards and furnaces are often stronger than the real need, and they can stay as backup. AirGreen confirms the capacity on site.
What to do, season by season
Three habits per season for this unit. They take a few minutes and prevent many calls.
- Clean the indoor unit's filters.
- Clear leaves and debris left on the outdoor unit by winter.
- Test cooling before the first hot days.
- Clean the filters more often when the unit runs a lot.
- Keep plants away from the outdoor unit.
- Check that no water drips from the indoor unit.
- Rake the leaves around the outdoor unit.
- Test heating before the first cold days.
- Book periodic maintenance before winter.
- Keep snow away from the stand and the front of the unit.
- Let the unit defrost: it is normal.
- Never hit the ice on the fins; call us if the unit stays iced up.
Which type of equipment for your project?
Pick what looks like your need.
Four mistakes we do not make
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What people ask us about this kind of work
Does a wall-mounted heat pump heat in winter?
Wall-mounted or multi-zone: how do I choose?
Where does the outdoor unit go?
Are there grants?
Do I need a permit?
How cold can it heat?
How much can I save?
How is the LogisVert assistance calculated?
Is it noisy?
The outdoor unit is covered in ice: is that normal?
Does AirGreen hold the required licences?
Is the estimate free?
No question matches. Write to us: we answer.
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Text and photo: a real AirGreen Climatisation & Chauffage job. The diagrams are generic illustrations of the type of installation, not a survey of this job site. Sources of the added figures: airgreen.ca product pages (NEEP / AHRI performance), Hydro-Québec (Heat pumps page, LogisVert, read on 13 October 2026), Régie de l’énergie (rate D as of 1 April 2026).