Installation of a Midea28 wall-mounted heat pump in Saint-Léonard
In Saint-Léonard, AirGreen replaced an old air conditioner with a Midea28 wall-mounted heat pump installed on wall brackets above the snow, with protected pipes and compliant connections. A compact, aesthetically pleasing solution ready to withstand Montreal winters.
- City
- Region
- Equipment
- Brand
- Challenges
- Published
The job on one screen
The unit’s data sheet
The range as published on airgreen.ca: pick a size to see its capacity in deep cold.
| Size | Heating at −8 °C | Heating at −15 °C | Coldest certified point | COP at −15 °C | SEER | HSPF | Indicative LogisVert aid |
|---|---|---|---|---|---|---|---|
| Midea Série 28 9 000 | 12,000 | 11,500 | −30 °C: 5,100 | 1.8 | 27.4 | 12.5 | – |
| Midea Série 28 12 000 | 12,000 | 11,500 | −30 °C: 5,900 | 1.8 | 25.4 | 10.5 | $1,440 |
| Midea Série 28 18 000 | 18,000 | 18,000 | −30 °C: 8,000 | 1.92 | 21.4 | 11.0 | $2,160 |
| Midea Série 28 24 000 | 22,200 | 24,200 | −30 °C: 11,900 | 2.34 | 21.0 | 13.5 | $2,664 |
| Midea Série 28 33 000 | 32,000 | 35,000 | −30 °C: 20,700 | 1.98 | 19.5 | 10.5 | $3,840 |
According to NEEP, it delivers 12,000 BTU/h at −8 °C (17 °F), as much as at 8 °C. It heats as hard in moderate cold as in mild weather.
At 8 °C, its certified maximum capacity reaches 16,000 BTU/h, 78% more than its nominal 9,000 BTU size.
According to NEEP, its certified heating capacity at −15 °C (5 °F) is 11,500 BTU/h, 128% of its nominal 9,000 BTU size. Its COP there is 1.80.
According to NEEP, it delivers 12,000 BTU/h at −8 °C (17 °F), as much as at 8 °C. It heats as hard in moderate cold as in mild weather.
At 8 °C, its certified maximum capacity reaches 16,000 BTU/h, 33% more than its nominal 12,000 BTU size.
At −30 °C, its certified minimum capacity is 2,000 BTU/h (3,800 at 8 °C). It slows down instead of cycling on and off.
According to NEEP, it delivers 18,000 BTU/h at −8 °C (17 °F), as much as at 8 °C. It heats as hard in moderate cold as in mild weather.
According to NEEP, its certified heating capacity at −15 °C (5 °F) is 18,000 BTU/h, 100% of its nominal 18,000 BTU size. Its COP there is 1.92.
According to NEEP, its COP at −15 °C is 2.34: the highest of the Série 28 line, which ranges from 1.80 to 1.98 at that temperature.
At −30 °C, its certified minimum capacity is 2,400 BTU/h (11,800 at 8 °C). It slows down instead of cycling on and off.
According to NEEP, its certified heating capacity at −15 °C (5 °F) is 24,200 BTU/h, 101% of its nominal 24,000 BTU size. Its COP there is 2.34.
According to NEEP, its certified maximum capacity at −30 °C (−22 °F) is 20,700 BTU/h, 63% of its nominal 33,000 BTU size.
At −30 °C, its certified minimum capacity is 4,200 BTU/h (19,700 at 8 °C). It slows down instead of cycling on and off.
According to NEEP, its certified heating capacity at −15 °C (5 °F) is 35,000 BTU/h, 106% of its nominal 33,000 BTU size. Its COP there is 1.98.
Data read live from the airgreen.ca page of each size (NEEP / AHRI certified performance). When the title names the installed size, it is highlighted; otherwise the whole range is shown. The aid shown is today’s, using Hydro-Québec’s rule ($120 per 1,000 BTU/h at −8 °C); amounts quoted in the article date from its publication. Only Hydro-Québec confirms the assistance granted.A dash in the aid column: amount to be confirmed for this model.
The article, chapter by chapter
In Saint-Léonard, a typical residential area in Montreal's east end with its brown brick facades, our team recently replaced an old air conditioning system with a new-generation Midea28 wall-mounted heat pump . The installation was designed for year-round comfort, but also for reliability in the depths of a Montreal winter.
Project context: replacing an old system with a 4-season solution
The owner wanted:
-
Replacing an old, noisy and inefficient condenser (visible in the foreground of the photo).
-
Benefit from efficient heating down to very low temperatures , to reduce the use of your main heating system.
-
Gain in energy efficiency and comfort, summer and winter.
-
To have a clean, compact installation that is well integrated into the brick facade.
After analyzing the house and the occupants' needs, we recommended a Midea28 wall-mounted heat pump , a flagship model from the Midea brand, designed for the Quebec climate and compatible with energy efficiency programs available in Greater Montreal.
Choosing the Midea28 wall-mounted heat pump
The Midea28 is a wall-mounted heat pump using next-generation refrigerant (R-454B), offering:
-
Stable heating down to approximately -30°C , ideal for Montreal winters.
-
Excellent air conditioning efficiency in summer, with reduced consumption.
-
Quiet operation, both indoors and outdoors.
-
A compact design, perfect for small spaces or already occupied facades.
In this project in Saint-Léonard, the Midea28 powers an indoor wall unit discreetly installed in the main living area, allowing the room to be heated and cooled quickly while improving the overall comfort of the house.
Details of the outdoor installation: safety, durability and aesthetics
In the photo, you can clearly see the Midea outdoor unit mounted on a brick wall, with the AirGreen label. Here are the key points of our installation:
1. Installation on raised wall brackets
We opted for wall mounting on reinforced metal brackets rather than a simple floor stand. This choice offers several advantages:
-
Keep the unit well above the snow level , which is essential for optimal operation in winter.
-
Protect the condenser from splashes, ice buildup and debris.
-
Facilitate maintenance and service interventions.
-
Limit the transmission of vibrations to the ground.
The supports were securely anchored in the masonry, with appropriate anchors for brick and concrete, to ensure long-term stability.
2. Refrigerant line management and aesthetics
The refrigerant pipes, communication cable, and indoor unit drain are bundled together in a brown PVC cover , positioned vertically along the brick wall. This allows:
-
To protect the pipes from weathering and UV rays.
-
To create a clean and uniform visual result, well integrated with the facade.
-
To simplify any potential future dismantling or replacement.
This attention to aesthetics is part of our signature: an AirGreen installation must be as beautiful as it is efficient.
3. Compliant and safe electrical connections
To the right of the outdoor unit, you can see the electrical box and the cable routing. We have:
-
Installed an outdoor disconnect switch that complies with the requirements of the Quebec Electrical Code.
-
Ensured cabling sized for the power of the Midea28, with dedicated circuit breaker for the main panel.
-
Checked clearances around the condenser for good air circulation and safe access for maintenance.
Working on the old equipment: transition to the new generation
The old white unit visible in the foreground was an old, less efficient air conditioner or heat pump . As part of the project, we have:
-
Safe decommissioning of the old system .
-
Recovered the old refrigerant in accordance with environmental standards.
-
Space freed up to optimize the installation of the new Midea28.
The owner now benefits from a modern Midea system offering much better energy performance, while reducing outside noise and improving interior comfort.
Winter comfort in Saint-Léonard: Midea's strength in extreme cold
A wall-mounted heat pump like the Midea28 is particularly attractive for residents of Saint-Léonard:
-
It helps to reduce the consumption of supplementary electricity or the main heating system , especially in the autumn and spring.
-
Thanks to its high-performance inverter technology, it precisely adjusts the power according to demand, avoiding frequent on/off cycles.
-
Its high seasonal yield translates into savings on the electricity bill , year after year.
Even in the middle of January, when temperatures plummet, the Midea28 continues to provide stable heating as long as the temperature remains within its operating range. It's an excellent complement to traditional heating systems, especially in a typical Montreal home with its brick walls and sometimes uneven insulation.
A discreet, clean installation, ready for years to come.
In addition to technical performance, our objective with this project in Saint-Léonard was to deliver:
-
An orderly facade, despite the presence of old equipment.
-
An easily accessible system for the recommended annual maintenance.
-
A robust installation, capable of withstanding freeze/thaw cycles and the winds of the Montreal plateau.
The result: a Midea28 wall-mounted heat pump installed neatly , elevated and perfectly suited to the needs of the house and its occupants.
Why choose AirGreen for your Midea project in Montreal?
As a company specializing in heat pumps and residential air conditioning in Greater Montreal , we:
-
We advise our clients on choosing the right capacity (BTU) based on the surface area and insulation.
-
We offer recognized brands such as Midea, Fujitsu, Gree, Sharp, etc.
-
We carry out installations that comply with electrical, mechanical and masonry standards .
-
We support our clients in understanding the guarantees and, where relevant, the financial assistance programs available.
Whether you live in Saint-Léonard, Rosemont, Ahuntsic, Laval or on the South Shore, our team is there to offer you a customized solution, while providing a human and accessible after-sales service.
Do you live in Saint-Léonard or elsewhere in Greater Montreal?
If you wish:
-
Replacing an old air conditioner with a Midea28 wall-mounted heat pump ;
-
Add an air conditioning/heating system for a new room;
-
Or simply get expert advice on your heat pump project,
Contact us at AirGreen. We would be happy to visit your home, assess your needs and offer you a high-performance, sustainable solution tailored to your budget.
The job tools
Two quick checks with real numbers: what heat costs, and what your current heaters add up to in BTU/h.
Baseboards and electric furnaces turn 1 kWh of electricity into 1 kWh of heat. A heat pump delivers more: that is its COP. At Hydro-Québec’s rate D (11.142¢/kWh above 40 kWh a day, since 1 April 2026):
Hydro-Québec: a heat pump can be up to three times more efficient than baseboards for heating in the colder months.
Estimate per kWh of heat, at the chosen temperature, using the certified COP from the product page. Taxes, access charge and backup heat not included.
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.
More jobs to see, near you
By town, by equipment or by region: browse more than 4,700 published projects.
Each dot: a town where AirGreen has published projects. The glowing dot: this job.
An on-site estimate, the right capacity, the right equipment.
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).