Installation of a Sharp wall-mounted heat pump in the Southwest
In the Southwest, AirGreen installed a Sharp Eco Inverter wall-mounted heat pump on a raised platform in a typical Montreal backyard. The outdoor unit is perfectly clear of snow, quiet and efficient, providing the homeowner with effective heating in winter and comfortable cooling in summer, all with a neat and safe mechanical finish.
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 Montreal's Southwest borough, backyards are often compact, shared between wooden decks, stairs, and small storage spaces. Installing a heat pump in this context requires a thoughtful approach to balance performance, quiet operation, and aesthetics. This is precisely what we achieved here with the installation of a Sharp Eco Inverter wall-mounted heat pump .
A typical Montreal plex project
The client lives in an apartment in a typical Southwestern brick building: masonry facade, wooden backyard, stair access, and limited space for mechanical equipment. His objectives were clear:
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Replacing an inefficient heating system.
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Add air conditioning to get through the summer heat waves.
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Install a reliable, quiet and discreet device, without encroaching on outdoor living space.
We recommended a Sharp ZU1 series wall-mounted heat pump, 18,000 BTU, Eco Inverter , perfectly suited to cover the main living area of the dwelling while respecting the site constraints.
System type: Sharp Eco Inverter wall-mounted heat pump
The installed system is a wall-mounted heat pump (mini-split) consisting of:
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With a Sharp wall head inside (silent horizontal wall unit).
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From an outdoor Sharp Eco Inverter condenser , visible in the photo, installed in the backyard.
This type of system offers several advantages for residences in the Southwest:
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Heating and air conditioning with a single unit .
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Inverter technology : the compressor continuously adapts its power, which reduces frequent starts/stops and decreases consumption.
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Flexible installation : ideal for existing homes where adding air ducts would be complex.
An outdoor positioning optimized for the Montreal climate
Installation on a raised support
The Sharp Eco Inverter outdoor unit was installed on a raised metal stand :
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Clearance from the terrace floor to avoid any direct contact with snow, ice and standing water.
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Protection against snow accumulation during winter storms.
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Improved drainage of defrost water, visible on the ground under the unit.
This galvanized steel support ensures exemplary mechanical stability and limits the transmission of vibrations to the building structure.
Compliance with clearances and air circulation
Despite the proximity of the brick and acrylic-clad walls, we have:
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Maintained sufficient clearance at the rear and sides of the condenser.
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Maintain a large free space in front of the fan grille to allow optimal air circulation .
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Position the unit in a corner that frees up passage on the terrace while remaining easily accessible for maintenance.
This configuration ensures the proper functioning of the heat pump even during high heating demands in the middle of winter.
Power supply and connection management
In the photo, we can see:
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An electrical disconnect box installed near the unit, in accordance with Quebec standards.
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The power cable is protected and neatly routed.
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The refrigeration pipes and drain are routed inside through the building wall, with an adequate slope for water drainage.
We pay particular attention to these details in order to guarantee safety, reliability and ease of service .
Performance of the Sharp Eco Inverter in winter and summer
A heat pump installed in Montreal must contend with:
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Harsh winters , often below -20°C.
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Increasingly hot summers , with high humidex values.
The Sharp Eco Inverter wall-mounted heat pump addresses these challenges thanks to:
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A high-efficiency compressor , capable of providing stable heating even when the outside temperature drops.
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An intelligent defrosting mode , which limits the formation of ice on the outdoor unit and ensures continuous heating.
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High-performance and quiet air conditioning in summer, with precise control of the indoor temperature and multiple fan speeds.
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Reduced electricity consumption compared to electric baseboard heaters or a traditional air conditioner.
For the customer, this translates into four-season comfort and reduced energy costs , especially when the heat pump is primarily used for heating.
Integration into the backyard and noise reduction
In a neighborhood like the Southwest, the proximity to neighbors and the small size of the courtyards require controlled noise levels and careful visual integration .
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The Sharp condenser has been oriented to direct airflow and noise away from the most frequently used doors and windows.
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Eco Inverter technology allows operation at reduced speed most of the time, which limits perceived noise.
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Positioning it on the terrace, near the wall, remains visually discreet , while leaving enough space to move around and enjoy the outdoors.
Thus, the customer can enjoy their terrace without being bothered by the equipment, even when the heat pump is running continuously.
A turnkey project by AirGreen
As with each of our Sharp wall-mounted heat pump installations in Greater Montreal, we offered a complete service:
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Analysis of needs and site layout
We assessed the area to be air-conditioned/heated, the insulation of the dwelling and the physical constraints of the backyard. -
Recommendation of the correct Sharp model
The Sharp ZU1 Eco Inverter 18,000 BTU series has established itself as the best compromise between power, efficiency and budget. -
Professional and compliant installation
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Sturdy, elevated stand.
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Clearances respected for air and snow.
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Refrigeration and electrical connections made according to best practices.
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Commissioning and explanations to the customer
We carried out functional tests, checked pressures and performance, then explained to the customer the use of the remote control, operating modes and basic maintenance (cleaning filters, clearing the outdoor unit, etc.).
Do you live in the Southwest and are considering a Sharp heat pump?
Whether you own a condo, duplex, or triplex in the Southwest, Verdun, Ville-Marie, or elsewhere in Montreal , the Sharp wall-mounted heat pump is an ideal solution for:
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Replace or supplement your existing heating systems.
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Enjoy reliable air conditioning in the summer.
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Reduce your energy consumption while gaining comfort.
At AirGreen , we support you at every stage: free assessment, choice of capacity, advice on available financial assistance, installation, maintenance and after-sales service.
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).