Installation of a Midea wall-mounted heat pump in Saint-Laurent
AirGreen installs a Midea wall-mounted heat pump in Saint-Laurent, integrated into a complex technical room. HVAC expertise in Montreal, Laval, Longueuil, North Shore and South Shore.
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.
A modern HVAC solution adapted to a complex technical space
At AirGreen , we recently installed a Midea wall-mounted heat pump in a building in the Saint-Laurent sector of Montreal. This project perfectly illustrates our expertise in HVAC solutions adapted to technical environments, where space, security, and efficiency constraints must be perfectly balanced. The goal: to provide optimal comfort while harmoniously integrating the equipment into a space already dense with mechanical systems.
Project background
The client contacted us to improve the thermal comfort of a technical room housing several heating and hydraulic control equipment. The space, already occupied by an electric water heater, an expansion tank, a circulation pump and a control panel, required a compact and efficient solution . The Midea wall-mounted heat pump was the ideal choice: quiet, energy-efficient and capable of ensuring precise temperature regulation, even in a light industrial environment.
Machine selection
The Midea wall-mounted heat pump installed in this project offers several advantages:
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Capacity adapted to the targeted space (9,000 to 12,000 BTU depending on the range chosen).
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High energy efficiency , meets Energy Star criteria.
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Reliable operation down to -25°C , ideal for Montreal's climate.
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Compact design , allowing integration without encroaching on the useful surface area of the premises.
Installation Steps and Challenges
Preparation and integration
Before any installation, our team carried out a complete assessment of the technical room. The main challenges were related to:
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The density of existing equipment , limiting the space for conduit passages.
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The need for a secure electrical connection, given the proximity of a panel and regulators already in service.
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The obligation to maintain easy access to plumbing and heating equipment.
Installation of the indoor unit
The wall unit was mounted high up on a metal wall with a diamond-cut aluminum finish , a solid and durable support. This choice not only provides a professional aesthetic but also increased safety in the event of condensation or splashing.
Connection management
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The refrigeration pipes have been carefully insulated to prevent any loss of efficiency.
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The electrical wiring was integrated into a suspended cable tray, ensuring an installation that was both tidy and safe.
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The condensation drain has been designed to prevent any infiltration into the technical room.
Results obtained
After commissioning, the Midea heat pump demonstrated rapid and stable room temperature regulation. Technicians confirmed:
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A minimal noise level , essential in a technical room where several pieces of equipment operate simultaneously.
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Energy stability that helps reduce the load on the building's main system.
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An immediate improvement in comfort and climate management in the space.
Subsidies and customer benefits
Thanks to its energy efficiency, the installed Midea heat pump is eligible for grant programs such as LogisVert and energy efficiency credits available on the North Shore, South Shore, Laval, and Montreal. Our team assisted the client in preparing the necessary documents, a value-added feature appreciated in this type of project.
AirGreen Expertise
Every HVAC project is unique. In this case, our role was to reconcile a challenging technical environment with performance and comfort requirements. This type of installation demonstrates the importance of calling on a specialized team capable of:
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Correctly assess the heat load.
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Identify mechanical and electrical constraints.
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Offer a reliable and suitable product like the Midea wall-mounted product .
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Perform a clean, safe and durable installation.
Why choose AirGreen for your HVAC installations in Montreal and its surrounding areas?
We operate in all areas of Greater Montreal —from Laval to the North Shore , including Longueuil and the South Shore —with the same attention to detail and performance. Whether for a condo, a single-family home, or a specialized technical room, we offer customized solutions and provide comprehensive support: installation, HVAC maintenance, and grant support .
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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Every house has its constraints. We see them before we install.
The on-site estimate is free and the quote follows within 24 hours.
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).