Installation of a Sharp wall-mounted heat pump in Rosemont–La Petite-Patrie
In this Rosemont–La Petite-Patrie home, AirGreen installed a Sharp wall-mounted heat pump above the stairwell window to efficiently heat and cool multiple floors. Thanks to its strategic placement and meticulous installation, the family now enjoys consistent comfort year-round while reducing their energy consumption.
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.
In this project in Rosemont–La Petite-Patrie, we were called upon to improve the comfort of a typical Montreal home by installing aSharp wall-mounted heat pump in the stairwell. This strategic location allows for efficient heating and cooling of multiple levels of the residence while preserving the interior aesthetics.
Context of the residency and challenges of the project
The house is built on several levels, with a central staircase and a window providing ample natural light. As is often the case in Montreal homes of this type, the heat rises quickly to the upper floor, while the ground floor remains cooler in winter… and the opposite occurs in summer.
The main challenges were therefore:
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Uniformize the temperature between floors.
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To offer a high-performance system in both summer and winter without major central ventilation work.
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Integrate the indoor unit discreetly into a visible space (stairwell + window).
The chosen solution: a Sharp wall-mounted heat pump , perfectly suited to the heating and air conditioning needs of a house in Rosemont–La Petite-Patrie.
Choosing the Sharp wall-mounted heat pump
For this project, we recommended and installed a Sharp ZU1 wall-mounted heat pump, 12,000 BTU , a model highly regarded for its reliability, energy efficiency, and quiet operation.
Why a wall-mounted heat pump?
Compared to a wall-mounted air conditioner or a simple electric heating system, the Sharp wall-mounted heat pump offers several advantages:
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Heating and air conditioning with a single unit : ideal for Montreal's climate, where temperature variations are significant.
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High energy efficiency : the heat pump transfers heat rather than producing it, which reduces the electricity bill.
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Flexible installation : no network of conduits is required, allowing work to be carried out in existing houses without major construction.
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Increased comfort : precise temperature control and power modulation according to actual needs.
The Sharp ZU1 series fits perfectly into this logic, with reliable operation in Quebec winters and very good dehumidification capacity during summer heat waves.
A strategic positioning in the stairwell
The photo clearly shows the Sharp wall-mounted head installed above the window in the stairwell . This location was not chosen by chance:
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Optimized air circulation
The staircase acts as a "vertical column" in the house. By placing the heat pump there, warm or cool air is naturally redistributed upwards and downwards. Result:-
The ground floor benefits from a better temperature,
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The upper floor prevents overheating in summer.
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Temperature variations between levels are significantly reduced.
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Ideal height for performance
The wall unit is installed high up, respecting the necessary clearances above and below to ensure proper air intake and efficient airflow. This also allows the airflow to be directed along the staircase , without blowing directly on the occupants. -
Aesthetic integration
The Sharp unit's white finish complements the pale walls, while the wooden window frame retains its charm. The heat pump doesn't visually dominate the space; it blends into the decor, which is important in a high-traffic area like the staircase.
Technical details of the installation
Even though the indoor unit is the only part visible in the photo, several important technical steps are behind this result:
Passage of refrigeration lines and drain
The refrigerant pipes , communication cable, and condensate drain are routed through the wall to the outside, inside a discreet enclosure. We always ensure that:
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The slope of the drain properly evacuates the water produced in air conditioning mode.
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The insulation is continuous to prevent performance losses and condensation.
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Everything is securely fixed and well sealed to withstand Montreal winters.
Sharp outdoor condenser
Outside, the Sharp wall-mounted heat pump is connected to a Sharp ZU1 compatible compressor , installed on a wall bracket or on slabs depending on the context (not visible in the photo, but chosen to withstand frost, snow and splashes).
In particular, we pay attention to:
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clear the unit of accumulated snow,
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respect the rear and side clearances.
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to limit vibrations and noise for the customer… and for the neighborhood.
Electrical connection
The Sharp heat pump is powered by a dedicated circuit in the electrical panel , with a circuit breaker appropriate for the unit's power rating and compliant with the Quebec Electrical Code. This installation is carried out by a qualified electrician to ensure safety and compliance.
Everyday comfort for a family in Rosemont–La Petite-Patrie
Since the installation of this Sharp wall-mounted heat pump , the occupants have benefited from several tangible improvements:
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More uniform temperature in the house : the staircase is no longer an area of hot or cold drafts, but a true point of diffusion of comfort.
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No more stuffy rooms in the summer : the efficient air conditioning of the Sharp heat pump keeps upstairs bedrooms comfortable even during heat waves.
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Economical heating in mid-season and winter : the heat pump takes over from electric baseboard heaters for a good part of the cold season, which reduces energy costs.
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Minimal noise : the quiet operation of the wall head is particularly appreciated in this circulation area.
Why choose AirGreen for your Sharp heat pump in Montreal?
At AirGreen , we specialize in residential HVAC in Greater Montreal (Montreal, Laval, North Shore, South Shore). When we recommend a Sharp wall-mounted heat pump , we don't just install a unit: we analyze your home's layout, your lifestyle, and your priorities (comfort, budget, subsidies, aesthetics).
In this Rosemont–La Petite-Patrie project, our approach was as follows:
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Analysis of heating and air conditioning needs across multiple levels.
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Choosing a high-performance Sharp model that is suitable for the size of the spaces.
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Precise positioning in the stairwell to maximize air circulation.
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Neat, clean installation, with attention to aesthetic detail.
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Explanation to the customer of how the remote control works, the modes (heating, air conditioning, dehumidification, auto), filter maintenance and best practices for winter.
If you live in Rosemont, the Plateau, Villeray, Mercier–Hochelaga-Maisonneuve, or elsewhere in Greater Montreal , we can offer you a similar, customized solution with a Sharp wall-mounted heat pump or another trusted brand depending on your project.
Maintenance and longevity of the Sharp wall-mounted heat pump
To ensure you can enjoy your system for a long time, we recommend:
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Clean the filters regularly (ideally monthly during periods of heavy use).
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Plan for periodic preventative maintenance : drain inspection, connection checks, blowing temperature, refrigeration pressure, etc.
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Clear the exterior condenser of snow and leaves.
AirGreen offers maintenance, repair and diagnostic services for Sharp wall-mounted heat pumps throughout Montreal and the suburbs.
Are you considering a Sharp heat pump for your home?
Whether you are in Rosemont–La Petite-Patrie or another neighbourhood in Greater Montreal, we will be happy to evaluate your project: stairwell, cathedral living room, upstairs bedrooms, extension, multi-generational… There is a Sharp configuration adapted to your situation.
Contact us for a free quote , and let us help you make your home more comfortable, more energy-efficient, and better prepared for Quebec winters and summers.
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).