Installation of a Sharp wall-mounted heat pump on a flat roof in Ahuntsic-Cartierville
Installation of a Sharp wall-mounted heat pump on a flat roof in Ahuntsic-Cartierville. AirGreen ensures safe, durable, and energy-efficient installation for Greater Montreal, including Laval, Longueuil, the North Shore, and the South Shore.
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 technical project optimized for lasting comfort
At AirGreen , we recently completed a Sharp wall-mounted heat pump installation in the Ahuntsic-Cartierville neighborhood of Montreal . This project perfectly illustrates our expertise in urban settings where outdoor space is limited and integration must respect the structural and aesthetic constraints of existing buildings.
The chosen unit is a Sharp Eco Inverter , a model known for its reliability, energy efficiency and ability to perform in Quebec winters. This HVAC installation not only helps improve the customer's indoor comfort, but also optimizes their energy consumption for heating and air conditioning.
Technical specifications of the installation
Outdoor unit suitable for flat roof
The outdoor unit was securely installed on a raised support , itself fixed to treated wooden beams to ensure weight distribution and protect the roof membrane. This type of mounting is essential on flat roofs to ensure:
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Stability against winds ,
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Protection against the accumulation of snow and water ,
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Increased roof durability .
Electrical and mechanical integration
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The electrical connection was made via a discreet route to the panel, using a metal box fixed to the brick technical chimney .
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The refrigeration and electrical lines have been carefully protected, with waterproof and insulated wiring , to withstand the elements.
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The height of the installation facilitates the evacuation of condensates by gravity, thus avoiding the need for an additional pump.
Constraint resolution
In this project, the main constraints identified were:
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Limited roof space , shared with other equipment.
→ We opted for a compact configuration, without encroaching on traffic areas. -
Protection of the roof membrane .
→ Suitable supports with distribution shims were used to preserve the integrity of the surface.
Why choose a Sharp heat pump in Montreal?
Energy performance
The Sharp Eco Inverter offers high efficiency, with stable operation even in negative temperatures. It is eligible for provincial and federal grant programs , particularly for homes located in Montreal, Laval, Longueuil, on the North Shore and the South Shore.
Four-season comfort
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Effective air conditioning during humid Montreal summers,
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Reliable heating down to -25°C, ideal for Quebec winters,
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Dehumidification mode to maintain optimal comfort.
Durability and simplified maintenance
Sharp focuses on robust design and low maintenance. At AirGreen, we offer a complete HVAC maintenance service to ensure our customers' continued long-term performance.
AirGreen expertise at the service of the customer
This project demonstrates our ability to adapt each HVAC installation to the architectural features of Montreal buildings. On a flat roof in an urban setting, it is crucial to combine technical expertise, compliance with safety standards, and attention to detail.
By choosing AirGreen, the customer benefits from:
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From a professional turnkey installation ,
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Support for grant applications (Montreal, Laval, Longueuil, North Shore, South Shore),
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A full warranty on the device and installation.
Conclusion
This Sharp heat pump installation in Ahuntsic-Cartierville illustrates AirGreen's commitment to providing high-performance, sustainable solutions tailored to the realities of Greater Montreal homes. Our team transforms each project into a sound investment, both for comfort and energy savings.
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.
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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).