Installation of a Sharp wall-mounted heat pump in Rosemont–La Petite-Patrie
AirGreen project in Rosemont–La Petite-Patrie: installation of a Sharp ZU1 wall-mounted heat pump with an outdoor unit on a wall bracket, ideal for Montreal's climate and urban brick buildings.
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 residential project in Rosemont–La Petite-Patrie , our AirGreen team completed the installation of aSharp wall-mounted heat pump , a solution perfectly suited to the brick buildings typical of this Montreal neighbourhood. This type of dwelling, often built with load-bearing masonry walls and partially above-ground basements, requires a rigorous approach from both a technical and aesthetic standpoint.
A Sharp wall-mounted heat pump designed for Montreal's climate
The installed system is a Sharp wall-mounted heat pump , from the Sharp ZU1 series, a model known for its reliability and high efficiency in cold climates. Operating with R-32 refrigerant, this heat pump offers an excellent balance between energy performance, comfort, and environmental responsibility.
General characteristics of the Sharp ZU1 model
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Inverter technology for precise power modulation
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Excellent heating performance during Quebec winters
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Quiet operation, both indoors and outdoors
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Compact size, ideal for dense urban environments
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Robust design suitable for freeze/thaw cycles
This type of wall-mounted heat pump is particularly popular in Rosemont–La Petite-Patrie, where residences are looking for efficient solutions without compromising the building's exterior appearance.
Context and constraints of the installation in Rosemont–La Petite-Patrie
The outdoor unit was installed on a wall bracket , securely anchored in the concrete foundation, just below ground level. This configuration is very common in this neighborhood, especially where:
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Floor space is limited,
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The backyard is narrow or non-existent.
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We want to limit the bulk and protect the unit from snow accumulation.
Visible and relevant installation details
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Sturdy wall mount ensuring excellent stability
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Adequate clearance around the condenser for optimal ventilation
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Strategic positioning below the brick line to reduce visual impact
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Refrigerant lines discreetly routed to the indoor unit
This type of installation also makes winter maintenance easier, a crucial point in an urban environment like Rosemont.
Indoor comfort and energy efficiency
Inside, the Sharp wall-mounted unit (not visible in the photo, but included in the system) ensures even air distribution in both cooling and heating modes. Thanks to Inverter technology, the heat pump continuously adjusts its power output, which allows for:
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a stable temperature
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a reduction in on/off cycles
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optimized electricity consumption.
For the occupants, this translates into constant comfort, summer and winter, and significant energy savings in the long term.
Why choose AirGreen for a Sharp installation in Montreal?
At AirGreen , we regularly install Sharp wall-mounted heat pumps in several Montreal neighborhoods, including Rosemont–La Petite-Patrie. Our approach is based on:
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a precise analysis of the building and its constraints,
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an installation that complies with the manufacturer's standards
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particular attention to aesthetics and durability,
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a thorough knowledge of local climatic realities.
Each project is tailored to the specific context of the residence, without generic solutions or compromises on quality.
An ideal solution for Rosemont brick residences
This Sharp ZU1 wall-mounted heat pump installation perfectly illustrates how a modern HVAC system can seamlessly integrate into an existing building while significantly improving indoor comfort. For duplexes, triplexes, and single-family homes in Rosemont–La Petite-Patrie, this type of configuration often represents one of the best possible choices.
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).