Installation of a Midea wall-mounted heat pump in a house in Sainte-Dorothée, Laval
Installation of a Midea28 wall-mounted heat pump in Sainte-Dorothée, Laval — perfect comfort upstairs, clean and quiet installation by AirGreen.
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 discreet and efficient heat pump installation for optimal comfort upstairs
At AirGreen , we recently completed a Midea wall-mounted heat pump installation in a single-family home located in Sainte-Dorothée, Laval . The client primarily wanted to improve the comfort of the upper floor —particularly in the central hallway leading to the bedrooms—while benefiting from a quiet, efficient, and energy-efficient system. With limited space at the top of the stairs, a compact, aesthetic, and safe solution was required.
An installation project adapted to the architecture of the house
The residence's central staircase presented a challenge: a narrow landing wall and sloped ceiling limited the possible locations. After a thorough inspection, our AirGreen team selected a solid wall opposite the bedrooms , ensuring even air distribution to the hallway and adjacent rooms.
The indoor unit was installed at an ideal height of 2.10 m, ensuring uniform air circulation while maintaining perfect visual discretion . The refrigerant and electrical conduits were carefully covered in white , matching the wall paint, to obtain a clean and harmonious appearance. The refrigeration lines were gravity- fed to the outdoor compressor, located at the rear of the house.
Why choose the Midea brand?
Midea is known for the robustness , reliability and energy efficiency of its appliances. For this project, we installed a Midea28 (R-454B) wall-mounted heat pump , a new generation model operating with R-454B refrigerant , which is more environmentally friendly and complies with the latest environmental standards.
This model offers:
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Exceptional energy efficiency (up to 22 SEER / 10.5 HSPF)
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Efficient heating capacity down to -30°C , ideal for Laval winters
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Inverter technology that continuously adjusts power according to demand
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Ultra-quiet operation , perfect for rest areas
Technical details of the AirGreen installation
System requirements:
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Type: Single-zone wall-mounted heat pump
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Make and model: Midea28 R-454B, 12,000 BTU
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Location: upper floor, landing wall (Sainte-Dorothée, Laval)
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Power supply: 230 V, dedicated circuit breaker
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Condensates: gravity drain to the outside
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Refrigeration lines: approximately 6 linear meters , protected wall/floor passage
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Wiring and capping: matte white , discreet and aesthetic
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Total installation time: 4 hours
Our team also carried out a complete check of the refrigeration load and the nitrogen leak rate , thus ensuring the perfect conformity of the system . The external compressor was installed on an anti-vibration slab , optimizing stability and reducing noise pollution.
Result: precise comfort and remarkable energy efficiency
Thanks to this installation, the customer now benefits from uniform comfort throughout the entire floor , with a stable temperature and precise control via the wireless remote control . The compact and modern device blends perfectly into the decor without disrupting traffic flow in the staircase.
The owner's initial feedback is eloquent:
"You no longer feel the temperature difference between the ground floor and the upper floor. The heat pump is quiet and uses very little electricity."
Energy subsidies and savings
The Midea28 R-454B is eligible for several grant programs offered by Hydro-Québec and Transition énergétique Québec , notably for its very low temperature performance and its efficiency greater than 20 SEER. This type of installation helps reduce annual operating costs while increasing the building's energy value.
AirGreen expertise: the difference you can feel
At AirGreen , every installation is carefully planned to fit your home's unique configuration . Our RBQ-certified technicians and HVAC experts ensure the highest standards of efficiency, aesthetics, and safety are met.
We support our clients at every stage:
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Free home assessment
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Selecting the optimal model
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Clean and quick installation
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Training in use and maintenance advice
This project in Sainte-Dorothée perfectly illustrates our approach: precise, aesthetic and durable work , offering the client total peace of mind for many years.
Why choose AirGreen for your HVAC installation in Laval
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RBQ certified local business
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Full warranty on parts and labor
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Expert technicians in Midea, Fujitsu, Gree, Sharp, and more heat pumps
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Fast and attentive after-sales service
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Areas served: Montreal, Laval, Longueuil, South Shore and North Shore
Whether you want to heat your floor , cool a space that is difficult to ventilate or optimize your energy efficiency , AirGreen always offers the right HVAC solution for your home .
In summary
This Midea28 wall-mounted heat pump installation in Sainte-Dorothée demonstrates our expertise in residential projects where efficiency and discretion must coexist. The result: four-season comfort , reduced energy consumption, and a perfectly integrated design.
For professional HVAC installation in Laval , trust AirGreen — your heating, ventilation and air conditioning expert in Greater Montreal.
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).