Installation of a Zephyr wall-mounted heat pump in Rosemont–La Petite-Patrie (Montreal)
In Rosemont–La Petite-Patrie, AirGreen installed a Zephyr wall-mounted heat pump with an outdoor unit on wall brackets, fixed to brick and raised for better winter resistance. Here are the advantages, installation details, and our best practices for lasting performance.
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In Rosemont–La Petite-Patrie, many buildings are constructed of brick, and the homes are designed for specific comfort levels without the need for extensive ductwork. This is precisely the context for this AirGreen installation: a Zephyr wall-mounted heat pump (mini-split) designed to provide air conditioning in the summer and efficient heating during Quebec winters, all while remaining discreet and well-integrated into the facade.
The photo clearly shows the Zephyr outdoor unit mounted on wall brackets above ground level on a brick wall , under an eave . This type of installation is very popular in Montreal, particularly for protecting the equipment, minimizing its footprint, and maintaining easy access for maintenance.
Why a Zephyr wall-mounted heat pump in Rosemont?
Rosemont is a vibrant neighborhood: limited spaces, close neighbors, compact backyards, and sometimes location constraints (balconies, passageways, landscaping, shared entrances). In this type of environment, a wall-mounted heat pump is often the most efficient solution because it:
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Offers room-by-room control (stable comfort, without overheating)
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Reduces reliance on supplementary heating
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Improves energy efficiency, especially during the mid-seasons
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Avoids the heavy work associated with a central system (ducts)
With Zephyr , we aim for a reliable and simple system, perfectly suited to Montreal residential use, while maintaining a good balance between performance, noise and durability.
Type of system installed
This is a wall-mounted heat pump (mini-split / wall unit) .
In practical terms, this means:
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An indoor unit (not visible in the photo) that distributes the conditioned/heated air.
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A Zephyr outdoor unit (visible), which contains the compressor and the heat exchanger
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Refrigeration lines (insulated piping) connecting the inside and outside
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A condensate drain (water management) and a dedicated power supply
Model
The exact model is not legible/identifiable in the photo. In this case, we are deliberately being consistent and cautious: it is a new generation Zephyr wall-mounted heat pump , typically installed in configurations ranging from 9,000 to 24,000 BTU depending on the size, orientation, and insulation. At AirGreen, sizing is always based on the actual needs of the home (and not "by guesswork").
Observable installation details (and why they matter)
1) Outdoor unit on wall brackets (elevation)
Wall mounting on brackets is an excellent choice in Montreal:
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Protection against snow and slush : In winter, a ground-mounted unit can be buried or suffer from ice buildup. Raised off, it breathes better.
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Safer drainage : defrost water flows away without creating a permanent puddle at the base.
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Maintenance made easy : direct access for inspection, cleaning, service.
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Less vibration transmitted to the ground : when the installation is done properly (with insulation), resonance is reduced.
In the photo, you can also see blue elements at the fixing points, used to secure and stabilize the installation (and, depending on the configuration, help to limit vibration).
2) Location on a brick wall: solid, but must be treated properly
Brick is common in Rosemont. However, a permanent installation is not simply a matter of "screwing into the wall":
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Fixings and anchors suitable for masonry
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Perfect level of unity for internal mechanics
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Respect the clearances around the fan
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Proper management of pipe installation (drilling, sealing, finishing)
At AirGreen, we pay particular attention to the sealing of the penetration point: it is a detail that prevents water infiltration, unwanted air and long-term problems.
3) Installation under the eaves: a good compromise
Being under the eaves can offer additional protection against direct rain and ice. The important thing is to maintain:
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Sufficient clearance above and to the sides
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Optimal air circulation for heat exchange
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Easy access to the service
What this configuration offers the customer (comfort + performance)
Summer comfort: stable, quiet, precise
A properly sized wall-mounted heat pump allows you to:
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A stable temperature , without harsh cycles
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A more uniform feeling of comfort
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Proper humidity management in air conditioning (depending on usage and configuration)
Winter heating: a real plus in Quebec
In Montreal, heat pump heating is very cost-effective in the fall, spring, and often for a good part of the winter. The system adjusts its output and maintains continuous comfort, which helps reduce the use of more expensive heating sources.
The technical points that AirGreen systematically checks
Even if the installation looks "simple" in photos, a high-performance wall-mounted heat pump relies on meticulous execution. During our installations, we specifically verify:
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Sizing (BTU) based on the dwelling: surface area, insulation, orientation, windows, lifestyle
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Location of the outdoor unit : noise, clearance, access, winter protection
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Quality of the refrigeration connection : insulation, routing, sealing, vacuuming
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Electricity : suitable circuit breaker, compliant cable, appropriate protective devices
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Condensate management/defrosting : prevent water and ice buildup in unwanted areas
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Finish : clean, discreet, aesthetically pleasing installation (particularly important on brick facades)
Common mistakes we avoid (very common in Montreal)
In many service interventions, we consistently encounter the same problems caused by shoddy installations. Here's what we warn about from the outset:
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Outdoor unit too low → snow / ice / air blockage
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Insufficient clearance → loss of performance, overheating, wear
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Poorly insulated connections → condensation, loss of efficiency
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Unsealed drilling → water/air infiltration
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Poorly secured supports → vibrations, noise, movement
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Incorrect sizing → discomfort, short cycles, higher bill
Recommended maintenance to keep the Zephyr in top condition
To maintain performance and longevity:
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Clean/maintain the indoor unit filters regularly (simple and essential)
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Keep the outdoor unit clear (of leaves, dust, snow)
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Schedule periodic inspection/maintenance: general check, cleaning, pressure checks and component condition assessment.
A well-maintained system is quieter, more efficient, and more durable.
Conclusion: a clean, robust installation adapted to Rosemont
This Zephyr installation exemplifies a distinctly Montreal approach: maximizing comfort while respecting the building's actual constraints. The wall-mounted installation on supports , on brick , with a raised unit under the eaves, is a smart choice for performance, accessibility, and winter protection.
At AirGreen, we always aim for the same goal: a solid , aesthetic installation, optimized for the climate of Greater Montreal — so that the heat pump works well, for a long time, and economically.
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).