Installation of a Midea wall-mounted heat pump in an apartment in Plateau-Mont-Royal
Professional installation of a Midea wall-mounted heat pump in Plateau-Mont-Royal. AirGreen offers four-season comfort, energy savings, and aesthetic integration for homes in Montreal, Laval, Longueuil, the North Shore, and the South Shore.
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The article, chapter by chapter
A modern comfort solution in a space with heritage character
In the heart of Plateau-Mont-Royal , a neighborhood known for its century-old buildings and interiors with unique architectural charm, our AirGreen team recently completed the installation of a Midea wall-mounted heat pump . This project perfectly illustrates the ability to integrate a high-performance heating and air conditioning (HVAC) system into a residential environment where every aesthetic and functional detail counts.
Choosing equipment adapted to customer needs
The owner of this apartment wanted to improve year-round comfort without compromising the aesthetics of his home with its period moldings. After analysis, we recommended a Midea 12,000 BTU wall-mounted heat pump , known for:
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its high energy efficiency (SEER2 and HSPF2 compliant with Quebec and Energy Star standards),
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its operating capacity down to -25°C , ideal for Montreal winters,
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its sound discretion , a key element in a compact residential environment.
Constraints and challenges related to old buildings
Installation in a heritage building always presents specific challenges. Here, the interior head had to be installed above a door frame, limiting the available space. Our technicians therefore:
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carried out a precise drilling for the passage of the refrigeration connections,
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integrated a discreet white capping that blends in with the existing moldings,
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installed the wall head at a strategic height to ensure optimal diffusion of air in the main space,
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installed a gravity drainage system , avoiding the addition of a visible condensate pump.
Benefits for the customer
From the moment it was put into service, the benefits were tangible:
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Four-season comfort : efficient heating in winter, effective air conditioning in summer.
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Energy savings thanks to inverter technology that automatically adjusts power as needed.
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Preserved aesthetics : the modern and compact design of the interior unit respects the heritage character of the apartment.
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Available subsidies : this type of heat pump is eligible for Quebec programs (LogisVert, Chauffez vert, municipal subsidies) and allows the customer to reduce the initial investment.
An installation carried out with care and expertise
Every installation at AirGreen is meticulously planned. In this project, our team coordinated:
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Preliminary electrical verification and connection in accordance with current standards.
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Complete vacuuming of the circuit to ensure sealing.
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Performance testing and calibration of the remote control so that the device meets the actual needs of the home.
AirGreen expertise serving the Plateau-Mont-Royal
We know that every wall-mounted heat pump installation project in Montreal has its challenges: limited space, heritage constraints, and expectations for comfort and efficiency. At AirGreen, we adapt our methods to offer reliable, durable, and aesthetic solutions, while respecting the unique character of homes in the Plateau-Mont-Royal and other areas of Greater Montreal.
The job tools
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.
How the job unfolds
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 we check on a job like this one
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.
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.
Good habits, once the unit is in place
Six simple habits that keep the unit going. Your list stays on this device.
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.
The right pages, at the right time
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).