Installation of a Sharp wall-mounted heat pump on a condominium rooftop in Rosemont–La Petite-Patrie
In Rosemont–La Petite-Patrie, AirGreen installed a Sharp wall-mounted heat pump on the flat roof of a condominium building, using an elevated support and meticulous commissioning. The result: year-round comfort for the owner, while respecting roof constraints and the peace and quiet of the neighborhood.
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The job on one screen
The article, chapter by chapter
In Rosemont–La Petite-Patrie, many condominium buildings are looking to improve the comfort of their residents while reducing their energy consumption. For this project, our AirGreen team was tasked with installing aSharp wall-mounted heat pump on the flat roof of a residential building, amidst several other outdoor units already in place.
Our mandate: to offer a co-owner a high-performance, quiet heating and air conditioning system that is perfectly integrated into the constraints of a Montreal condo roof.
Choosing a Sharp wall-mounted heat pump for a Montreal condo
For this project, we opted for a Sharp ECO Inverter wall-mounted heat pump , an ideal solution for medium-sized apartments:
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Inverter technology to modulate power and avoid on/off cycles.
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High-efficiency compressor, perfectly suited to the temperature variations of Montreal's climate.
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Use of a modern refrigerant (R-32), which is more efficient and less environmentally impactful than previous generations.
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Reduced noise level, essential in co-ownership to respect the peace and quiet of the neighborhood.
This type of Sharp wall-mounted heat pump provides heating in winter, air conditioning in summer and dehumidification in the mid-season , all from a single discreet unit installed inside the condo.
A flat gravel roof: a demanding technical environment
The Sharp outdoor unit was installed on the building's flat gravel roof , alongside other existing condensers (including some Goodman units). This type of environment requires several precautions:
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Respect for the roof membrane : no excessive perforation, use of appropriate supports.
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Managing weight and load distribution, so as not to concentrate pressure on one point.
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Preserving clearances around each unit to ensure good air circulation.
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Resistance to harsh weather conditions (snow, ice, wind and sun) and to possible snow accumulation in winter.
Our technicians therefore designed a custom installation for this Sharp wall-mounted heat pump, respecting all these constraints.
Elevated supports and maximum stability
The photo clearly shows that the Sharp unit is installed on a raised aluminum stand , fixed to crossbars placed on the ground:
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Rigid and corrosion-resistant structure, ideal for flat roofs.
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Sufficient elevation to keep the bottom of the unit away from gravel, snow, and runoff water.
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Anti-vibration pads under the feet of the support to limit the transmission of vibrations to the building structure.
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Careful alignment with other devices, for a clean and orderly visual appearance on the roof.
This attention to detail ensures superior longevity of the Sharp wall-mounted heat pump, while reducing the risk of noise or resonance for occupants located under the roof.
Refrigeration connection and careful commissioning
While the photo is being taken, our technician completes his commissioning sheet while monitoring the measuring equipment connected to the Sharp unit. This step is crucial for the long-term reliability of the system.
Here's how we typically proceed:
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Thorough vacuuming of the refrigeration circuit to eliminate moisture and air.
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Leak test to ensure that there are no leaks on the fittings.
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Checking operating pressures in air conditioning or heating mode, depending on the season.
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Control of electrical currents and protection (dedicated circuit breaker, compliant wiring).
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Validation of error codes and proper communication between the indoor and outdoor units.
This protocol, combined with the quality of the Sharp wall-mounted heat pump, allows us to deliver to the customer a system ready to face Montreal winters without any unpleasant surprises.
Integration with the condominium and comfort for the client
On a roof already occupied by several outdoor units, coordination with the condominium association is essential. We have:
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Respect the areas reserved for mechanical equipment.
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Position the Sharp unit to minimize the visual and noise impact on neighbors.
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Safe access corridors have been maintained on the roof for future maintenance work.
Inside the condo, the Sharp wall-mounted head unit complements the comfort of the main living space:
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Gentle and even air distribution.
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Stable temperature, without cold drafts.
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Silent mode so as not to disturb sleep or teleworking.
The owner now enjoys 4-season comfort , with an optimized electricity bill thanks to the efficiency of the Sharp inverter compressor.
Results: performance, reliability, and peace of mind
With this Sharp wall-mounted heat pump installation in Rosemont–La Petite-Patrie, the client benefits from:
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With efficient heating in winter , capable of maintaining a comfortable temperature even during cold spells.
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With efficient air conditioning in summer , ideal for the increasingly frequent heat waves in Montreal.
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With a silent and discreet system, compliant with the requirements of the condominium.
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A secure installation, designed to protect both the roof and the equipment.
As with all our installations, AirGreen assists the customer with warranty registration , usage advice and preventive maintenance reminders.
Entrust your Sharp heat pump project to AirGreen
Whether you are a co-owner in Rosemont–La Petite-Patrie or elsewhere in Greater Montreal, our AirGreen team has the expertise to:
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Recommend the correct Sharp wall-mounted heat pump capacity based on the size of your home.
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Adapt the installation to the realities of your building : flat roof, balcony, backyard, brick wall, etc.
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Ensure rigorous commissioning, in accordance with industry standards.
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We offer you comprehensive support , from the first visit to after-sales service.
Are you thinking of upgrading your heating and air conditioning system? A Sharp wall-mounted heat pump installed by AirGreen is a sustainable investment for your comfort, your wallet and the environment.
The job tools
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.
How the job unfolds
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.
What we check on a job like this one
Each number is a point we check on site. Switch between summer and winter to watch air and heat move.
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.
Is your home ready?
Check what applies at your place. A "no" is not a refusal: it is what we sort out during the estimate.
Good habits, once the unit is in place
Six simple habits that keep the unit going. Your list stays on this device.
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.
The right pages, at the right time
Four statements: true or false?
It all comes down to details you have just seen.
1. In heating mode, the outdoor unit can produce water.
During defrost cycles. That water must drain away without forming ice.
2. You pick the capacity with a simple square-footage rule.
Windows, insulation, orientation and how the room is used all count. Capacity is chosen on site.
3. A multi-zone connects several indoor heads to a single condenser.
One head per room, all on the same condenser. Each room keeps its own temperature.
4. The disconnect can sit behind the patio furniture.
It must stay accessible: it is what shuts the unit off for service.
0 / 4 right answers
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).