Installation of a Goodman wall-mounted heat pump in an apartment in Rosemont–La Petite-Patrie
AirGreen installed a Goodman wall-mounted heat pump in an apartment in Rosemont–La Petite-Patrie. An efficient and discreet HVAC solution for comfort in Montreal.
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The article, chapter by chapter
An HVAC comfort solution adapted to Montreal’s urban realities
In older apartments in Rosemont–La Petite-Patrie , space is often limited, and the room layout poses unique challenges for HVAC installation . At AirGreen , we are regularly called upon to modernize these homes while respecting their architectural charm. Recently, we installed a Goodman wall-mounted heat pump in an apartment located above a typical duplex in the area, with high ceilings and narrow passageways.
The particularities of the project
The client chose a Goodman wall-mounted heat pump , renowned for its reliability and energy efficiency. While this brand is more widely used in the central systems sector, its wall-mounted version represents a high-performance and affordable solution for urban housing.
Constraints identified
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Limited height above an interior door : The wall-mounted head was installed in a narrow hallway, which required precise positioning to ensure good air circulation.
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Ductwork : The technical space was limited, forcing our technicians to carefully conceal the piping in a section of partition and use a discreet white cover to harmonize everything.
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Existing structure : the old load-bearing walls had increased density, requiring suitable tools to drill and securely anchor the unit.
Technical details of the installation
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Machine type : wall-mounted heat pump (mini-split).
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Brand : Goodman.
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Capacity : 12,000 BTU configuration suitable for an apartment size of 600 to 800 sq. ft.
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Performance : Energy Star certification, guaranteeing reduced consumption in heating and air conditioning.
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Condensate drainage : gravity, thanks to a controlled slope which avoids the need for a lifting pump.
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Electricity : connection to a dedicated 15A circuit breaker, with wiring discreetly routed to the electrical panel.
Benefits for the customer
Thanks to this Goodman wall-mounted heat pump installation , the customer now benefits from:
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four-season comfort , with efficient air conditioning in summer and economical auxiliary heating in winter,
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a significant reduction in their energy bill compared to electric baseboards,
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a discreet installation respecting the interior aesthetics,
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peace of mind thanks to the manufacturer's warranty and annual maintenance offered by our teams.
Possible grants and savings
Goodman wall-mounted models in this category are eligible for LogisVert grants and provincial programs , subject to low-temperature performance criteria. In this case, we assisted the client in preparing their application, allowing them to reduce the net cost of installation.
AirGreen Expertise in Greater Montreal
At AirGreen, every project is unique. We understand that apartments and plexes in Montreal often have architectural and electrical constraints that require a tailored approach. Our experience in Rosemont, the Plateau, Villeray, and throughout Greater Montreal allows us to offer solutions that combine energy performance, aesthetics, and respect for the existing building.
The job tools
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.
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).