Installation of a Sharp wall-mounted heat pump in Southwest Montreal
In this bright condo in Southwest Montreal, AirGreen installed a Sharp ZU1 wall-mounted heat pump that seamlessly integrates into the décor, providing exceptional heating and cooling comfort. Discover how our team overcame the aesthetic and technical challenges of this open-concept space to create a peaceful, efficient environment, ready for Quebec winters.
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 modern condo in Southwest Montreal, our AirGreen team was tasked with enhancing year-round comfort while preserving the warm aesthetic of the space. Bathed in natural light, the area features a mezzanine living room with glass railings, a music corner with an upright piano, and several live plants.
To meet the heating and cooling needs of this open area, we installed aSharp wall-mounted heat pump , Sharp ZU1 model of approximately 18,000 BTU , perfectly suited to the lifestyle of the occupants and the Montreal climate.
A bright condo with strong aesthetic constraints
The condo has several distinctive features:
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Open-plan area with a glass railing overlooking the ground floor.
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The main wall is very visible , adorned with a large blue canvas and an upright wooden piano.
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Carefully decorated ambiance : solid wood furniture, designer chaise longue, hanging plants and large windows with solar shades.
In such a context, it was essential to choose a discreet, quiet appliance that blended well into the decor. The Sharp wall-mounted heat pump perfectly met these requirements.
Why a Sharp wall-mounted heat pump for this space?
We recommended and installed a Sharp wall-mounted heat pump (ZU1 series, R-32) for several reasons:
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Versatile heating/cooling for a living space used intensively, summer and winter.
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High-efficiency technology : the Sharp ZU1 range uses R-32 refrigerant, which is more efficient and environmentally friendly than R-410A.
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Excellent winter performance : ideal for Montreal's climate, with efficient operation even in very cold weather, reducing reliance on other heating systems.
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Quiet operation : a crucial point in a room dedicated to relaxation and music, in the immediate vicinity of a piano.
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Simple and clean design : the minimalist white case blends well with the light wall, the painting and the wooden elements.
Strategic positioning of the wall-mounted head
The photo shows the Sharp wall-mounted head installed high up on the central wall of the mezzanine . This choice is not insignificant:
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The elevated position allows the unit to circulate air evenly throughout the open area, both towards the living room and the lower part of the condo.
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The unit is located at a safe distance from the windows , avoiding constraints related to air infiltration and thermal bridges.
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We have respected the clearances recommended by the manufacturer in relation to the ceiling and side walls, to ensure good air circulation and facilitate maintenance.
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The unit is installed above an open space (near the glass railing), which reduces the risk of furniture obstructing airflow.
Result: the heat pump efficiently distributes heat in winter and coolness in summer, without creating unpleasant drafts for occupants sitting in the living room or at the piano.
Technical installation details
Even though we only see the internal unit here, several technical points have been taken into account:
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Drilling and routing of refrigerant lines directly behind the wall head, allowing a short and optimized route to the outdoor unit.
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Decorative sheaths used outdoors to conceal refrigeration pipes and wiring, and to protect everything from the elements.
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Condensate drain management with an adequate slope to ensure gravity flow, thus avoiding any risk of water leakage inside.
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Installation of the Sharp outdoor unit on a suitable support (floor base or wall bracket depending on the layout), with anti-vibration pads to minimize noise and resonance.
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Dedicated electrical connection , compliant with the Canadian Electrical Code, sized according to the power of the heat pump and protected at the panel.
The entire system complies with current standards and Sharp manufacturer recommendations, guaranteeing a durable, safe and efficient installation.
Comfort, acoustics and air quality
In this type of room, which includes a piano, armchairs and a reading corner, comfort is not limited to temperature:
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Reduced noise level : The Sharp heat pump operates in very quiet mode, allowing you to play the piano, read or watch a movie without being disturbed by the noise of the device.
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Dehumidification mode is appreciated in summer, especially in a condo with large windows where the sun can raise the temperature and humidity.
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Air filtration : washable filters trap dust and particles; combined with the presence of plants, they contribute to better indoor air quality.
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Gentle air diffusion : thanks to the motorized flap, the air is directed towards the volume of the room rather than directly onto the occupants, avoiding the sensation of a draft.
A heat pump designed for the winters of Southwest Montreal
The Southwest is an area where buildings are often composed of renovated condos and lofts with large expanses of glass. These characteristics mean that:
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Solar gains in summer can be significant, hence the importance of efficient air conditioning .
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Heat loss in winter, especially through windows, is significant, which justifies the installation of a high-efficiency wall-mounted heat pump to reduce energy bills.
The Sharp ZU1 addresses these realities by offering:
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An excellent coefficient of performance (COP) in heating, even in cold weather.
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Intelligent defrost management , limiting heating interruptions on very cold days.
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Perfect compatibility with priority use, with another heating system (baseboards, convectors or other) only used as a backup during extreme cold.
AirGreen, your Sharp heat pump specialist in Greater Montreal
At AirGreen, we support our clients in the Southwest, Plateau, Verdun, Laval and throughout the metropolitan area in the selection, installation and maintenance of their heating and air conditioning systems.
For this project, as for all others:
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We analyzed the room layout and the occupants' lifestyle.
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We proposed a suitable Sharp solution , both in terms of power and winter performance.
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We have created a meticulous installation , designed with both comfort and aesthetics in mind.
If you live in Southwest Montreal or elsewhere in Greater Montreal and wish to benefit from a reliable, efficient and discreet Sharp wall-mounted heat pump , our team will be happy to advise you.
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).