Installation of a Zephyr wall-mounted heat pump on a rear balcony – Plateau-Mont-Royal (Montreal)
Discover an AirGreen installation of a Zephyr wall-mounted heat pump in the Plateau-Mont-Royal: outdoor unit fixed to the wall on robust supports, vibration reduction, neat finish and heating/cooling comfort perfectly suited to Montreal plexes.
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The article, chapter by chapter
In central neighborhoods like the Plateau-Mont-Royal , HVAC installations require a very precise approach: access via exterior staircases, brick facades, limited spaces, and the need to preserve the aesthetics of the backyards typical of Montreal duplexes. At AirGreen , we regularly undertake these kinds of projects, where every detail counts for both performance and discretion.
Today, we present a residential installation of a Zephyr wall-mounted heat pump (mini-split), with an outdoor unit mounted high on wall brackets, perfectly suited to a dense urban environment.
A system designed for 4-season comfort in Montreal
Choosing a Zephyr wall-mounted heat pump addresses a very common urban need: achieving consistent comfort in both summer (air conditioning) and winter (heating) , without major construction work or a duct network. This type of system is particularly popular in duplex/tripleplex dwellings, condos, and apartments because it allows for:
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precise temperature control ,
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a rapid increase in comfort ,
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a silent and effective solution,
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excellent energy performance on a daily basis.
Although the exact model is not legible in the photo, the set corresponds to a Zephyr residential wall-mounted configuration with a compact outdoor unit (ideal size for wall/balcony installations).
The constraints of the Plateau: access, vibrations and proximity
In a Montreal backyard, improvisation is not an option. The location and method of installation directly influence durability, noise level, and even the peace and quiet of the neighborhood. Here, several visible elements confirm a "clean" installation, carried out according to best practices:
1) Outdoor unit on sturdy wall brackets
The Zephyr outdoor unit is installed on wall brackets (steel supports) securely anchored in the masonry. This approach is ideal when:
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Floor space is limited.
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We want to avoid clutter on a balcony or in a courtyard.
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we want to reduce the risks associated with snow, standing water and debris.
2) Vibration (and noise) reduction
Support elements are designed to reduce vibration transmission . In urban environments, this is essential: less vibration means less resonance in the brick and structure, resulting in quieter operation, especially in the evening and at night.
3) Nearby outdoor electrical box
An electrical disconnect switch is clearly visible near the unit. This is a crucial point for:
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security,
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the interview,
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compliance,
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the speed of intervention in the event of a diagnosis.
4) Clean and protected routing of connections
The routing of pipes and cables is done in an orderly fashion, following a path that aligns with the building's design. In practice, at AirGreen, this means: protecting the connections, limiting exposure, maintaining a clean finish, and avoiding routes that detract from the facade.
Why this location is strategic
Installing an outdoor unit high up on a wall in the backyard of a duplex offers concrete advantages:
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Better protection against snow accumulation and splashes.
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Clear access for movement on the balcony and in the stairwell.
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Maintenance is simplified , as the sides and front of the unit remain accessible.
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Less risk of accidental collisions (garbage cans, bicycles, outdoor furniture, etc.).
Obviously, this location requires on-site technical validation: clearances, support strength, air circulation, and drainage management (condensation/defrosting). This is precisely what our teams handle from the initial assessment.
A Zephyr wall-mounted heat pump: a logical choice in the city
For a home in the Plateau-Mont-Royal area, a Zephyr wall-mounted heat pump is often an excellent compromise between performance and simplicity:
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Effective air conditioning during Montreal heat waves.
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Comfortable heating during the cold seasons (and very advantageous in the mid-seasons).
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Precise room-by-room control (depending on the interior configuration).
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A modern solution and generally more economical to use than direct electric heating.
And most importantly: it is an installation that can be carried out while minimizing the impacts on the building — a particularly important point in central districts where aesthetics and coexistence matter.
Our AirGreen approach: performance, cleanliness, reliability
In this type of project, our priority is always the same: to deliver a durable installation, visually clean , and optimized for the Quebec climate.
In practical terms, this means:
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a secure structural fixing,
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attention to noise and vibrations,
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serious management of air emissions,
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neat finishing of the joints,
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and rigorous commissioning (tests, calibrations, verifications).
Conclusion: a successful urban installation, designed to last
This installation of a Zephyr wall-mounted heat pump in the Plateau-Mont-Royal perfectly illustrates what is sought in an urban environment: a compact, efficient, discreet system, intelligently installed despite space and access constraints.
If you are in a plex, a condo or a brick building in Montreal and you want a reliable HVAC solution, we can offer you the most suitable configuration — with a careful, compliant installation designed for your reality.
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).