Installation of a Sharp wall-mounted heat pump in Plateau-Mont-Royal
AirGreen installed a Sharp Eco Inverter wall-mounted heat pump in Plateau-Mont-Royal, with an outdoor unit on a brick wall, rigorous vacuum sealing and careful finishing, offering the client efficient energy comfort in both air conditioning and heating all year round.
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The article, chapter by chapter
In the heart of the Plateau-Mont-Royal, in a typical Montreal brick building, our AirGreen team completed the full installation of aSharp wall-mounted heat pump . The client's objective was clear: to enjoy year-round comfort in their home, while maximizing energy efficiency and preserving the aesthetics of the facade.
A typically Montreal context
The building is located in an alley in the Plateau district, with its red brick walls and stacked apartments. As is often the case in this type of building:
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The ground space is limited at the rear, with an area of decorative rocks along the foundation.
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The facades are visible from the courtyard or the alley, which requires a clean and discreet assembly .
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Tenants need a quiet and efficient air conditioning system in the summer and a heating system in the shoulder seasons, or even in the middle of winter.
In this context, the most suitable solution was a Sharp Eco Inverter wall-mounted heat pump , installed on an outdoor wall bracket and connected to an indoor wall head.
System choice: a Sharp Eco Inverter heat pump
We recommended a Sharp ZU1 series wall-mounted heat pump, 12,000 BTU – a classic for Plateau apartments:
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Inverter technology to modulate power and reduce energy consumption.
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Efficient heating capacity in cold weather , ideal for Montreal's climate.
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Compact, quiet compressor, designed to be forgotten in everyday use.
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Integration of Sharp's proprietary technologies, including air treatment by Ion Plasmacluster , contributing to improved indoor air quality.
This choice allows the client to benefit from a system that is reliable, efficient and economical , while respecting the constraints of the existing building.
Outdoor unit installation details
In the photo, we see the Sharp Eco Inverter outdoor unit securely mounted on galvanized steel wall brackets . Several technical points are important:
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High mounting : the device is installed above the foundation line, which protects it from snow, ice and splashes in winter.
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Clearances respected :
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Sufficient space behind the unit for air circulation,
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Front clearance to allow for good fan sweep
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adequate distance from the ground to facilitate maintenance.
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Consoles sized to support the weight of the device and limit vibrations on the brick.
The refrigerant pipes are carefully guided along the wall and then covered to their destination. The passage for the electrical cable and the condensation drain is also visible; these will all be secured and protected once the commissioning tests are complete.
To the right of the unit, another condenser is visible, illustrating the density of equipment often found in the Plateau's backstreets. Our role is to coordinate the placement to avoid any conflicts with exhaust air and to comply with installation standards.
Professional vacuum sealing and commissioning
With their backs against the wall, our team installed a manifold connected to the heat pump, as well as a vacuum pump . This step is crucial:
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Vacuuming of the refrigeration circuit
The vacuum pump removes air and moisture from the pipes and indoor unit. A clean, dry system is essential for:-
to prevent internal corrosion,
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prevent ice from forming in the regulator,
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to ensure the longevity of the compressor.
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Leak test
Using the manifold, we verify that the system maintains a stable vacuum. In case of loss, we can immediately detect and correct any leaks at a fitting. -
Opening the refrigerator and performing functional tests
Once the checks are complete, the refrigerant contained in the Sharp unit is released into the circuit. We then test:-
the operating pressure ,
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the blowing temperature ,
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the behavior of the heat pump in cooling and heating modes.
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This rigorous process ensures commissioning in accordance with standards and guarantees optimal performance from day one.
Integration with the indoor unit
Although not visible in this photo, the outdoor unit is connected to a Sharp wall-mounted unit installed high inside the dwelling. This indoor/outdoor combination allows for:
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rapid air conditioning of rooms in summer.
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comfortable and stable heating during the cold season,
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quiet operation, particularly appreciated in bedrooms or home office spaces.
The refrigeration lines pass through the brick wall via a carefully made opening, which is then insulated to prevent air and moisture infiltration.
Four-season performance and comfort in Plateau-Mont-Royal
Thanks to this Sharp wall-mounted heat pump installation, the customer now benefits from:
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of tailor-made comfort : stable temperature, filtered air, better controlled humidity;
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reduced energy bills , as the heat pump uses electricity more efficiently than electric baseboard heaters or some older systems;
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a versatile solution : a single device to cool in the summer and heat for much of the year, even in sub-zero temperatures.
In a neighbourhood like Plateau-Mont-Royal, where buildings are sometimes poorly insulated or heated unevenly, a properly sized Sharp heat pump represents a significant upgrade in residential comfort .
AirGreen's expertise at the service of your project
At AirGreen, we don't just install a machine: we offer a comprehensive solution tailored to your building, your lifestyle, and the Quebec climate. For this Plateau-Mont-Royal project, that means:
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A preliminary analysis of the configuration of the facade and the courtyard.
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Choosing a Sharp model appropriate for the volume to be processed.
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A clean, solid and durable outdoor installation on a brick wall.
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A complete commissioning including vacuuming, leak testing and performance checks .
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Personalized advice on using the remote control, seasonal modes and maintenance.
Whether you live in Plateau, Rosemont, Villeray, Outremont or elsewhere in Greater Montreal, we can assist you with your Sharp wall-mounted heat pump project, from the quote to annual maintenance .
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).
