Installation of a Haier wall-mounted heat pump in Rosemont–La Petite-Patrie
AirGreen installed a Haier wall-mounted heat pump in a duplex in Rosemont, Montreal. An efficient, quiet, and energy-efficient HVAC solution, perfectly suited to the owners' needs.
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The job on one screen
The article, chapter by chapter
A residential project in a duplex typical of the neighborhood
At AirGreen , we recently completed the installation of a Haier wall-mounted heat pump in a duplex in the Rosemont–La Petite-Patrie neighborhood of Montreal . This area, characterized by its narrow streets and red brick facades, often imposes space and traffic constraints, particularly when it comes to installing heating and air conditioning (HVAC) systems. Our team rose to the challenge by proposing a tailor-made solution, adapted to the energy needs and comfort of the occupants.
Client context and needs
The owner was looking for an effective solution to:
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Replace an old wall-mounted air conditioner that has become energy-consuming,
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Improve four-season comfort,
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Benefit from a system eligible for Quebec subsidies for efficient heat pumps.
The choice fell on a Haier model known for its reliability, energy efficiency and stable operation down to very low temperatures.
Technical details of the installation
Interior positioning
The wall-mounted headboard was installed directly above the door leading to the backyard. This strategic choice allows:
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Uniform diffusion of air in the main space,
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Optimization of available wall space,
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Simplified accessibility for regular maintenance.
Refrigerant drilling and connections
Our technicians made a direct hole behind the wall header to install the refrigeration pipes. The pipes were carefully insulated and covered with discreet white capping , in harmony with the interior walls.
Condensate management
In this project, we opted for gravity drainage with an appropriate slope towards the outside. This avoids the need for a condensate pump, thus reducing maintenance costs and the risk of breakdown.
Outdoor unit and route
The outdoor unit was installed on a reinforced wall bracket , slightly overhanging the backyard floor. This arrangement:
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Protects the condenser from snow accumulation in winter,
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Facilitates the flow of condensate,
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Guarantees consistent performance even during freezing episodes.
Performance and customer benefits
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Selected capacity: 12,000 BTU , ideal for efficiently covering the main living space of the home.
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Energy efficiency : Energy Star certification, guaranteeing savings on electricity bills.
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Four-season comfort : efficient heating down to -25°C, fast and quiet air conditioning in summer.
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Simplified maintenance : washable filters and quick access for after-sales service.
Thanks to this installation, the customer benefits from stable comfort all year round , a significant reduction in energy consumption and a modern system perfectly integrated into the aesthetics of their home.
The challenges encountered and the solutions provided
Space constraints
In Rosemont duplexes, narrow alleys and rear balconies often limit the available space for the outdoor unit. We solved this challenge by mounting the unit on a sturdy wall bracket, freeing up floor space.
Insulation and noise
To reduce noise transmission to neighbors, we have added anti-vibration pads between the condenser and the wall mount. This detail ensures quiet operation, respecting the immediate neighborhood.
Why choose AirGreen for your HVAC installation in Montreal?
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Local expertise : we understand the technical realities of Montreal buildings (plexes, condos, duplexes).
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Customized solutions : each project is analyzed based on architectural constraints and energy needs.
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Turnkey service : from heat pump selection to grant applications, we support our customers every step of the way.
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Careful work : aesthetic cappings, reinforced supports, discreet finishes.
At AirGreen, we believe that every wall-mounted heat pump installation project in Montreal, Laval, Longueuil, the North Shore, or the South Shore must combine performance, reliability, and aesthetics. This project in Rosemont perfectly illustrates our commitment to quality and lasting comfort for our customers.
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).