Installation of a Zephyr wall-mounted heat pump in Rosemont–La Petite-Patrie
Installation of a Zephyr wall-mounted heat pump in Rosemont–La Petite-Patrie by AirGreen: performance, comfort, and a meticulous finish for a typical Montreal duplex. HVAC expert for Montreal, Laval, and the South Shore.
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 HVAC solution for a typical Montreal duplex
At AirGreen , we recently installed a Zephyr wall-mounted heat pump in a brick duplex in the Rosemont–La Petite-Patrie neighborhood , an area known for its multi-story homes, rear balconies, and unique urban character. This project perfectly illustrates our approach: combining energy efficiency, aesthetic discretion, and sustainable performance , all adapted to the architectural realities of Montreal.
An ideal configuration for two-story residences
The client wanted a heating and cooling solution capable of maintaining consistent comfort year-round without encroaching on interior space. The Zephyr wall-mounted heat pump was a natural choice: compact, quiet, and perfectly suited to the needs of urban housing.
Our team installed the outdoor unit on galvanized wall brackets , allowing optimal air circulation while freeing up the floor. Condensate drainage is by gravity , eliminating the need for an additional pump, while the white casing of the refrigerant lines ensures a neat finish and lasting protection against the elements.
Technical details and benefits of the Zephyr system
Zephyr wall systems are distinguished by their stable performance even in extreme temperatures . Depending on the configuration, they can provide efficient heating down to -25°C , a major asset for Montreal winters.
Here are some key features of the installed model:
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Type: single-zone wall-mounted heat pump
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Brand: Zephyr
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Power: approximately 12,000 to 18,000 BTU (depending on the size of the home)
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Installation: wall mounted on exterior support, direct electrical wiring, complete aesthetic cover
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Sound level: very low, ensuring optimal acoustic comfort
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Simplified maintenance thanks to quick access to filters and refrigerant connections
A typical Montreal installation challenge
Access to the backyard was restricted, requiring careful logistics for positioning and securing the compressor. Our technicians planned each step to minimize impacts on the existing brick , while ensuring solid anchoring and safe condensate drainage .
All wiring and refrigerant lines have been carefully routed through a discreet passage to the indoor unit , ensuring a smooth and secure installation.
Performance and comfort: a successful balance
Since installation, the customer has benefited from constant thermal comfort , a significant reduction in electricity consumption , and silent operation that fits perfectly into neighborhood life.
Zephyr modulation technology automatically adjusts power according to ambient temperature, ensuring maximum energy efficiency and smooth operation year-round .
An installation eligible for subsidies
As several Zephyr models meet ENERGY STAR® standards, they may be eligible for certain provincial and municipal grant programs (for example, the Rénoclimat or Chauffez vert program).
At AirGreen, we support our customers in these steps, providing them with all the information necessary to maximize their savings .
AirGreen expertise at your service
Each wall-mounted heat pump installation project in Montreal represents a new opportunity for us to demonstrate our expertise. We combine technical expertise , aesthetic rigor and respect for existing buildings to deliver results that combine performance, reliability and elegance.
If you live in Montreal, Laval, Longueuil, the North Shore or the South Shore , our team is ready to advise you on the best HVAC solution for your home, whether it is a duplex, a condo or a single-family home.
AirGreen – Air Conditioning & Heating Montreal
Local expertise for durable, efficient and guaranteed installations.
How it goes, from the first call to the end
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.
And 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.
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.
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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?
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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).