Installation of a Mitsubishi Electric wall-mounted heat pump in Saint-Laurent
AirGreen installed a Mitsubishi Electric wall-mounted heat pump in Saint-Laurent, ensuring efficient heating, comfort, and energy savings for an optimal HVAC project.
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.
An installation project adapted to the winter season
At AirGreen , we know that indoor comfort doesn't take a break, even during the holidays. In Saint-Laurent, we recently installed a Mitsubishi Electric wall-mounted heat pump , a smart choice for a family looking to combine efficient heating in winter with efficient air conditioning in summer . The installation was carried out in a living room decorated for the holidays, perfectly illustrating the importance of having a reliable HVAC system all year round.
Why Mitsubishi Electric appeals to our customers so much
Mitsubishi Electric 's reputation in the field of wall-mounted heat pumps is based on three major assets:
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Proven performance in Quebec : designed to operate efficiently even in extreme cold, some ranges reach down to -25°C without any significant loss of power.
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Reliability and durability : These devices require little maintenance and are known for their longevity.
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Optimal comfort : thanks to precise temperature control and quiet operation, the daily experience is greatly improved.
In this case, the installed device was calibrated to cover the area of the living room and part of the adjoining open area, ensuring constant comfort despite variations in outside temperature.
Key steps of installation
Initial assessment and preparation
Our technicians began by analyzing the interior layout to determine the best location for the wall-mounted fan. The choice fell on a central wall, providing even air distribution. The installation height was optimized to promote circulation and avoid any obstacles, even with a large Christmas tree placed underneath.
Drilling and connection
A discreet hole was made to connect the indoor head to the outdoor compressor. The refrigeration and electrical lines were carefully insulated and protected, meeting our professional HVAC installation standards. A gravity slope was chosen for drainage, thus avoiding the addition of a condensate pump.
Commissioning and calibration
After connection, the heat pump was tested in heating mode. The results immediately demonstrated a rapid temperature increase, with even distribution. The occupants were able to enjoy increased comfort from the very first minutes.
Grants and financial benefits
Installing wall-mounted heat pumps like this one may be eligible for various grant programs, such as LogisVert or the Federal Greener Homes Program , as long as the chosen model meets energy efficiency criteria. Mitsubishi Electric is among the manufacturers offering several approved ranges, which represents an interesting opportunity to reduce the initial investment.
The challenges encountered and our solutions
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Aesthetic constraint : the device had to fit into an interior decor already designed for the holidays. Our technicians adjusted the height and position to maintain both efficiency and visual harmony.
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Optimizing airflow : The Christmas tree placed directly under the heat pump could have obstructed airflow. Careful orientation of the louvers allowed us to avoid the obstacle without compromising performance.
Customer Testimonial
The owner emphasized his satisfaction upon starting:
"We wanted a device that could heat us quickly in winter without relying solely on electric heating. The AirGreen installation was quick, clean, and perfectly suited to our needs. You can feel the difference immediately!"
Why choose AirGreen for your HVAC installation in Montreal and Laval
Using AirGreen means benefiting from:
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Local expertise covering Greater Montreal, Laval, Longueuil, the North Shore and the South Shore.
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Complete support : choosing the right device, grant procedures, installation, maintenance.
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A commitment to quality : our facilities always meet the highest standards in performance, safety and aesthetics.
Conclusion
This installation in Saint-Laurent perfectly illustrates how a Mitsubishi Electric wall-mounted heat pump combines comfort, energy savings, and discreet design, even in a living space decorated for the holidays. At AirGreen, we pride ourselves on transforming each HVAC project into a sustainable solution adapted to Quebec's climate realities.
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).