Sharp heat pump installation in Westmount: a durable and high-performance rooftop solution
AirGreen installed a Sharp wall-mounted heat pump on the roof of a Westmount residence, featuring a durable elevated support and a configuration optimized for winter heating. Discover a clean, safe installation perfectly suited to the urban environment.
Take a tour of the installation
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.
The image provided shows an outdoor installation on the flat roof of a typical residential building in central Montreal, overlooking mid-rise buildings and high urban density. The setting clearly evokes Westmount , a neighbourhood where historic buildings and multi-family dwellings stand alongside newer structures.
After visual analysis of the equipment and respecting the brand provided manually ( Sharp ), we are in the presence of aSharp wall-mounted heat pump , most likely from the Sharp ZU1 range, a model frequently used in residential settings for its robustness, its performance in winter heating and its quiet operation.
A rooftop installation perfectly suited to the urban environment
In the case of this Westmount residence, the optimal solution was to place the external condenser on the roof. With this type of building, several factors come into play:
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Space optimization : parking lots and backyards are often limited; the roof becomes an ideal area to accommodate an HVAC unit.
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Noise reduction : Moving the condenser away from windows and outdoor living areas increases the comfort of occupants and neighbors.
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Safety and longevity : the structure used — an elevated aluminum support fixed on treated beams — protects the condenser against the accumulation of water, snow, ice and vibrations.
In the photo, the Sharp unit is securely mounted on a galvanized steel base , itself stabilized by wooden glides resting on rubber pads that protect the roofing membrane. This configuration meets our AirGreen standards for a durable, stable, and non-invasive installation on existing surfaces.
A high-performance Sharp heat pump for the Quebec climate
Sharp ZU1 systems are known for:
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Their efficient operation in heating mode even when temperatures drop below −20 °C.
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Their inverter compression allows for excellent modulation, reduced consumption and consistent comfort.
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Their reliable performance in both air conditioning and heating for urban dwellings.
In a neighborhood like Westmount — where buildings are often old and sometimes poorly insulated — this technology perfectly meets the needs of residents by offering precise and economical control of indoor temperature.
Meticulous work carried out by our AirGreen teams
For this project, our team ensured:
✔️ Preliminary structural analysis
We have verified the roof's capacity to accommodate the equipment without risk to its membrane or structure.
✔️ A clean and neat installation
All fixings are secure, levels are perfectly adjusted, and contact points are protected to prevent premature wear.
✔️ Secure connection passage
Electrical wiring and refrigerant lines are carefully guided to remain protected from weather and accidental movement.
✔️ Compliance with standards
As with every AirGreen installation, the entire system complies with:
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The Quebec Building Code ,
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The requirements of manufacturers,
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Provincial electrical standards,
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And best HVAC practices for flat roofs.
An installation that adds comfort, value and efficiency
Thanks to this Sharp heat pump, the homeowner now benefits from:
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Four-season comfort ,
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A significant reduction in energy bills ,
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A discreet, silent system adapted to the constraints of the city center,
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And an installation ready to face the coldest winters.
We are proud to have contributed to improving the comfort of this Westmount residence with a reliable, high-performance and durable solution.
The big day, step by step
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 would it look like 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.
Four mistakes we do not make
Flip each card to see what we do instead.
Your own project, step by step
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.
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.
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).