Installation of a Sharp wall-mounted heat pump in Mercier–Hochelaga-Maisonneuve
AirGreen installs a Sharp wall-mounted heat pump on a brick facade in Mercier–Hochelaga-Maisonneuve : wall brackets, vertical capping, short path and rigorous commissioning for 4-season comfort.
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.
A brick facade, 4-season comfort: careful installation of a Sharp condenser at height for a typical HoMa duplex
The context: optimizing a Montreal duplex without harming its aesthetics
At AirGreen , we are modernizing the comfort of a red brick duplex in Mercier–Hochelaga-Maisonneuve . The owner wants an energy-efficient solution that provides heating in the off-season and air conditioning in the summer, while respecting the typical rear architecture: garden door, protective awning , narrow windows with stone sills . We recommend a Sharp wall-mounted heat pump in a single-zone configuration to supply the main living area on the 2nd floor.
What we install and why
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Equipment type : wall-mounted heat pump (mini-split), Sharp brand.
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Objective : to offer stable comfort and controlled consumption , with a contained exterior noise level for the neighborhood.
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Installation : wall-mounted condenser mounted on galvanized brackets above the rear awning, refrigeration lines covered vertically up to the upper floor, condensate drainage and cabling integrated into the same route.
Keywords: wall-mounted heat pump , HVAC installation , Montreal , Laval , Longueuil , North Shore , South Shore .
Key steps in AirGreen installation
1) Site analysis and route selection
The rear facade has a canopy over the door and a clear lintel. We fix the condenser about 2.6–3.0 m from the ground , which:
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clear the passageway,
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protects the device from snow swirls and splashes,
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frees the awning while maintaining accessibility for maintenance.
The indoor unit in question is located upstairs. To minimize pressure losses and maintain efficiency, we adopted a nearly vertical route with brick-colored capping that blends into the facade.
2) Support and vibration management
We install two steel brackets anchored in the masonry with suitable chemical anchors .
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Anti-vibration pads under the condenser to cut off transmission to the bricks.
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Strict level to ensure correct defrosting in winter.
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Side and rear clearances respected according to the manufacturer's recommendations (free air circulation).
3) Refrigeration lines and external protection
The copper pipe set is bent without folding, insulated in a closed cell and capped with a vertical external casing . This capping:
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protects against UV rays and bad weather,
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cover refrigerant connections and communication cable ,
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guides the possible descent of the condensate drain if necessary.
A discreet baffle above the unit limits water runoff from the brick and awning trim.
4) Electricity and compliance
We check the power supply dedicated to the electrical panel, with compliant circuit breaker and rating.
Outside, local interruption and wiring are secured, sheathed in accordance with codes. Grounding is validated.
5) Sealing, nitrogen and high vacuum
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Nitrogen pressurization to test for leaks,
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High vacuum to approx. 500 microns to dry the circuit,
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Opening of valves and checking of temperatures /pressures upon commissioning.
Specific challenges of this project and solutions
H3 — Awning and door below: preserve circulation and aesthetics
Challenge: Avoid an awkward projection above the door and not block the awning.
AirGreen solution: high brackets with sufficient span, clearances respected, and compact anti-runoff deflector . The vertical path aligned with the masonry joint makes the capping almost invisible .
H3 — Installation at height: safety and precision
Challenge: two-story facade, ladder access and handling at height.
AirGreen Solution: equipped team (harness, temporary anchors, double ladder), template for level installation, torque tightening and final anti-vibration check.
H3 — Controlled refrigeration length
Challenge: Connect the inner head of the floor while limiting elbows .
AirGreen solution: straight route along the facade then crossing at height , length optimized to preserve the SEER/HSPF of the heat pump.
Results: comfort, silence and efficiency on an urban facade
Comfort in the upstairs room
The indoor head serves the living area. In cooling , the air is projected along the ceiling for even diffusion ; in heating , the setpoint is stable and the cycles are fluid thanks to the Inverter compressor .
Reduced nuisance for the neighborhood
The Sharp condenser has a contained sound profile . The anti-vibration mounting and compliance with clearances limit resonance on the brick.
Easy maintenance
Access to the condenser from the ladder remains simple. The capping protects the insulation and prevents water from entering the holes.
HVAC Use and Maintenance Tips
Good daily practices
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Auto mode in spring/fall to intelligently switch between heating and cooling .
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Fins slightly upwards in summer, horizontal in winter.
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Filters to be dusted every 4 to 8 weeks depending on use.
Annual maintenance recommended
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Checking pressure switches , connections , drain and condition of flares .
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Cleaning the exchangers to maintain performance .
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Control of vibrations and outside air flow (winter snow removal if accumulation).
Sizing and choice of power (BTU)
AirGreen Method
We size according to: surface area , insulation , orientation , solar gains and use .
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9–12 kBTU : Small rooms or living areas.
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18–24 kBTU : large living rooms or open floors.
HoMa's installation, with its typical ceiling and southwest-facing exterior wall, requires attention to summer solar radiation and winter stratification . The well-adjusted Sharp wall-mounted heat pump meets these requirements.
Grants and eligibilities in Greater Montreal
High-performance residential heat pumps may be eligible for financial assistance in Quebec. We support our customers in Montreal , Laval , Longueuil , the North Shore and the South Shore for:
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validate the technical criteria ,
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prepare proof of installation (photos, serial numbers),
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provide the documents required by the programs in force.
What AirGreen brings to this type of Montreal building
Expertise in brick facade and clean openings
Careful drilling, watertight sheaths , respect for joints and discreet finishes.
Short route = sustainable return
By aligning the condenser with the axis of the inner head, we reduce losses and stabilize seasonal performance.
Full HVAC Service
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Advice and sizing ,
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Certified HVAC installation (support, electricity, sealing, commissioning),
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Maintenance and after-sales service : everything you need to keep your wall-mounted heat pump operating at its best.
Frequently Asked Questions (selection)
Can the condenser be mounted lower?
We prefer a height that protects the device from accumulations (snow, dirt) while maintaining access . On this facade, the upper area is the most suitable.
What if we also want to air condition the bedrooms?
We offer MultiZone solutions or the addition of a second head depending on the configuration and refrigeration load.
Can the capping be a different color?
Yes. We match the color to the siding or woodwork for maximum visual integration.
Conclusion
This Sharp wall-mounted heat pump installation in Mercier–Hochelaga-Maisonneuve demonstrates our expertise in Montreal brick facades : robust support , aligned capping , optimized cooling path and rigorous commissioning . The result: reliable and discreet 4-season comfort , ready for the hot summers and bitter winters of Greater Montreal . For your projects in Montreal , Laval , Longueuil , on the North Shore and the South Shore , our team will support you from study to maintenance.
How it goes, from the first call to the end
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.
And 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.
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.
Which type of equipment for your project?
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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).