Installation of a Midea28 wall-mounted heat pump in Rosemont–La Petite-Patrie
Installation of a Midea28 heat pump by AirGreen in a vestibule in Rosemont–La Petite-Patrie . Performance at −30°C, discreet design and 4-season comfort for efficient heating and cooling in Greater Montreal.
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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
A sleek Midea28 heat pump installation in a Montreal hallway
At AirGreen , we know that every corner of a Montreal home can be optimized for maximum thermal comfort, without compromising aesthetics or space. This installation of a Midea28 wall-mounted heat pump in a typical Rosemont–La Petite-Patrie vestibule perfectly illustrates our expertise: efficiency, precision, and harmonious integration into the residential environment.
A compact vestibule, an engineering challenge mastered
The entrance hall of this residence, with its oval-patterned glass door and low ceiling , left little room for the installation of a wall-mounted unit. However, our team was able to optimally position the Midea28 indoor head, just above the door , ensuring even air distribution in the hallway and adjacent rooms.
The limited space required the use of a low-clearance stepladder and precise routing of the wiring to the side wall leading outside. Thanks to our experience with older Montreal buildings, we anticipated structural and clearance constraints.
The choice of the Midea28: performance and silence
The Midea28 is a new generation wall-mounted heat pump with R-454B refrigerant , designed to deliver high performance while reducing environmental impact. Its operation down to −30°C makes it a top choice for Montreal's harsh winters.
Its main advantages:
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High-efficiency inverter technology allowing fine modulation of power.
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Ultra-low noise level (indoor < 21 dB), perfect for passageways.
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4-season heating and cooling capacity , with integrated dehumidification.
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Compatibility with Quebec grant programs for Energy Star systems.
Aesthetic integration and discreet refrigerant path
In this project, the client wanted to avoid any visible trunking in the vestibule. We therefore opted for a hidden side passage , with capping matching the exterior color of the wall.
The refrigerant pipe route has been carefully planned:
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Wall outlet behind the side partition,
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Direct crossing to the outside,
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Condenser installed on wall brackets to preserve the floor space of the balcony.
This minimal path reduces heat loss and optimizes system efficiency, while preserving interior aesthetics.
Immediate and uniform thermal comfort
Once put into service, the Midea28 quickly demonstrated its capabilities:
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Stable and even heating from the first minutes.
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Intelligent regulation thanks to the wall sensor and programmable thermostat.
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Adjustable airflow to direct heat to the hallway or living room.
This installation eliminated the temperature variations often experienced in Montreal entrances and stairwells.
Safety, efficiency and simplified maintenance
Our certified technicians performed a complete leak test of the refrigerant lines, verified the gravity drainage of the condensate , and calibrated the airflow for optimal performance.
The customer now benefits from a guaranteed, reliable and economical system , requiring only annual maintenance to maintain its performance.
A typical project from our work in Montreal
This type of installation perfectly illustrates the versatility of our AirGreen team . We operate in all boroughs of Montreal, Laval, the South Shore and the North Shore, adapting each project to local architectural realities—whether it involves older plexes, renovated condos, or single-family homes .
The Midea28, with its balance of compactness, performance and durability, meets the needs of many urban households looking for a modern, quiet and energy-efficient HVAC solution .
Why choose AirGreen for your Midea heat pump installation in Montreal
By entrusting your project to AirGreen, you benefit from:
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Recognized expertise in the installation of Midea, Gree, Sharp and Fujitsu wall-mounted heat pumps.
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A turnkey service , including needs assessment, professional installation and grant procedures.
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Personalized follow-up after installation to guarantee the longevity and performance of your system.
Every detail counts—orientation, height, clearance, condensate drainage—and it is this rigor that makes the difference between a standard installation and an AirGreen installation.
In summary
This Midea28 wall-mounted heat pump installation in Rosemont–La Petite-Patrie demonstrates that a cramped entryway can become a space of optimal thermal comfort thanks to careful planning and proven expertise. At AirGreen, we transform every constraint into an opportunity for innovation, serving the sustainable comfort of Montrealers.
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.
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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).