Installation of a Sharp wall-mounted heat pump in Mercier–Hochelaga-Maisonneuve
AirGreen installs a Sharp wall-mounted heat pump in a plex in Mercier–Hochelaga-Maisonneuve: wall-mounted condenser under canopy, neat white capping, silence and performance. Serving Greater Montreal (Montreal, Laval, Longueuil, North Shore, South Shore).
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.
An optimized urban HVAC project: four-season comfort, discretion and performance in a typical Montreal backyard
The context: a Montreal plex and its real constraints
In this Mercier–Hochelaga-Maisonneuve plex, the client wanted a quiet and efficient HVAC solution to cool the living area in the summer and support heating during the off-season. The backyard showcases local architectural codes: ochre brick , exterior metal staircase , balcony awning above, and a wooden deck . These elements guide our strategy: air circulation to protect, clearances to respect, technical access to secure, and careful aesthetic integration .
Why a Sharp wall-mounted heat pump ?
Our teams recommend a Sharp wall-mounted heat pump for three main reasons:
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High seasonal efficiency of recent R-32 ranges (e.g. ZU1 / ZHU1 / TU series), ideal for Greater Montreal .
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Low noise level of the condenser and the interior head, important in the shared courtyards of the plexes .
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Reliability and parts available quickly through our local network.
Please note: depending on availability and needs, we guide you towards the most relevant R-32 range (low temperature heating, advanced filtration, Wi-Fi options). Once the exact model is determined, we include it in the contract and explain in detail its BTU , SEER2/HSPF2 and guarantees.
Visible installation details: what we do differently
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Sharp wall-mounted condenser mounted on sturdy galvanised brackets , rear and side clearance in accordance with the manufacturer's recommendations.
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Positioning under the balcony awning : the unit is protected from bad weather (rain, ice) while maintaining a large air intake/discharge area .
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Capped path ( white capping) for the refrigeration lines , the condensate drain and the electrical supply : a clean vertical route along the brick wall, limiting drilling and respecting aesthetics.
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Useful height : the raised installation preserves the space of the terrace and prevents the accumulation of snow on the ground.
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Vibration treatment : anti-vibration pads on consoles + torque-controlled tightening to reduce transmission to the brick wall.
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Neat through-hole** with vapor barrier and external sealing for airtightness.
Sizing & performance: behind the scenes
The choice of capacity ( 9,000 to 18,000 BTU in most plex rooms) depends on:
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the orientation and sunlight of the room,
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of the surface area and ceiling height ,
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insulation (windows, air infiltration),
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the mode of occupation (open kitchen, internal charges).
At AirGreen, we carry out a rapid and documented thermal assessment . This avoids an oversized unit (short cycles, uneven comfort) or an undersized unit (lack of capacity during heat waves). The result: controlled electricity consumption and stable comfort .
Refrigeration and electricity: cleanliness and compliance
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Estimated line length : ~6–10 m total (vertical run + wall crossing). We stay within the manufacturer's range and charge/adjust the refrigerant as needed.
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Nitrogen brazed connections , leak test and deep vacuum (≤ 500 microns) before commissioning.
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Outdoor disconnect switch installed nearby ( Electrical Code requirements), dedicated breaker for the panel.
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Priority gravity drain : discreet outlet, continuous slope, frost protection. Condensate pump only if required by the architecture.
Noise, airflow and neighborhood: the art of remaining discreet
The side metal staircase and the canopy influence the air vortices . We orient the unit to:
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avoid recycling hot air in air conditioning mode,
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prevent premature frosting in heating mode,
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minimize sound radiation towards the terrace and neighbors.
Our fan speed settings and the night mode of the recent Sharp series maintain remarkable acoustic comfort .
Result obtained with this client
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Even cooling of the living space, measured drop in indoor temperature of 3–5 °C in less than an hour on a hot day.
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Effective supplemental heating in fall and spring, relieving the main system and reducing energy bills.
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Minimal visual impact : the white hooded line blends in with the light brick and woodwork.
HVAC Maintenance: Simple, But Essential
To maintain performance:
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Clean the inner head filters every 4–8 weeks during use.
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Annual AirGreen inspection : refrigeration pressure, sealing, electrical connections, coil cleaning .
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In winter: keep the blowing/defrosting area clear of snow around the wall condenser.
Grants and programs: what may apply
In the greater Montreal, Laval and Longueuil areas, several programs support high-efficiency heat pumps (particularly when certified and efficient at low temperatures).
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Recent Sharp R-32 ranges (e.g. ZU1 , ZHU1 , TU/THU ) generally meet the desired efficiency and cold weather heating requirements.
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We verify eligibility on a case-by-case basis (operating range, SEER2/HSPF2 , power), and assist the customer with the paperwork .
AirGreen Expert Advice for MHM Plexes, Rosemont, Southwest
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Favor wall mounting on brackets in narrow courtyards: healthier air circulation and less risk from snow.
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Protect under an awning when possible: better longevity, protected components.
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Think about the neighborhood : choose quiet units and location that diffuses noise toward the open courtyard rather than the windows.
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Anticipate maintenance : clear access for annual maintenance and winter defrosting.
AirGreen deadlines, guarantees and monitoring
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Technical visit and detailed quote shortly after the first contact.
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Typical HVAC installation : one day for a single wall-mounted heat pump .
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Manufacturer's warranty on parts, AirGreen warranty on labor, and priority seasonal after-sales service .
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Quality File: before/after photos, commissioning records, serial numbers—everything is archived.
Why AirGreen for your HVAC installation in Montreal, Laval, Longueuil, North Shore and South Shore?
Our strength: field engineering (thermal balance, flow orientation, acoustics), clean execution (straight capping, watertight drilling, clean finishes), and administrative support (grants, guarantees). Whether in Mercier–Hochelaga-Maisonneuve , Rosemont–La Petite-Patrie , Chomedey (Laval) or Brossard , we deliver durable, efficient and aesthetic HVAC installations .
Fast Fair
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Equipment type : Sharp wall-mounted heat pump , one indoor head (multi-zone possible depending on needs).
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Use : summer air conditioning + mid-season supplementary heating.
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Maintenance : regular filters + annual inspection.
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Grants : depending on model and performance; we validate for Montreal, Laval, Longueuil, North Shore, South Shore .
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Follow-up : long-term AirGreen assistance.
Do you have a similar project in Greater Montreal ? Contact AirGreen : we design, install, and maintain your wall-mounted heat pump with the same high standards as those presented here.
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?
Pick what looks like your need.
Four mistakes we do not make
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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).