In Rosemont–La Petite-Patrie, you often come across typical Montreal brick buildings, with cornices, soffits, balconies, and sometimes narrow exterior spaces. This is exactly the kind of environment where an HVAC system must be meticulously planned: winter performance, noise, clearances, drainage, aesthetics… and above all, long-term reliability.
At AirGreen , we carried out the installation of a Zephyr wall-mounted heat pump (mini-split) here with a very concrete concern: to integrate the outdoor unit in a clean, solid and safe way, while respecting the constraints of a brick wall and a residential facade.
The context: four-season comfort in a densely populated area of Montreal
Rosemont–La Petite-Patrie is a mix of duplexes, condominiums, and multi-family buildings. The needs are often the same:
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Efficient air conditioning in the summer (Montreal's humidity can be persistent)
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supplementary (or main) heating during the mid-season
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improved temperature stability in the most exposed rooms
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Cost reduction thanks to a properly sized heat pump
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Discreet and robust installation, even in sometimes limited outdoor space
The Zephyr wall-mounted heat pump meets this type of demand well: a compact, quiet system, capable of providing comfortable heat when temperatures drop, provided that the installation is done correctly (supports, clearances, drainage and quality of connections).
Machine type: wall-mounted heat pump (mini-split)
The photo clearly shows a mini-split type outdoor unit , installed on a wall bracket. This is the typical architecture of a wall-mounted heat pump : an indoor unit (inside the dwelling) connected to an outdoor unit (on the facade), via refrigerant lines and communication/power cabling, all carefully routed.
This type of system is very popular in Montreal for good reason:
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Relatively quick installation (compared to a ducted system)
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excellent comfort/fuel consumption ratio
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precise room-by-room control (depending on the area)
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Excellent choice for condos, plexes, and houses without existing ductwork.
Brand: Zephyr (used as a reference)
The brand supplied is Zephyr — we consider it the benchmark for this project, both in the choice of system and in the way it is integrated into the building.
Model: Zephyr wall-mounted series (residential configuration)
The exact model is not visible on the outdoor unit from this photo. In this case, we remain consistent and realistic: it is a Zephyr residential series wall-mounted heat pump , designed for heating and cooling in a Greater Montreal home.
What matters most, beyond the exact model name, is that the system is:
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properly sized (BTU adapted to the dwelling, insulation and orientation)
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installed with proper clearances and good vibration management
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Configured for stable performance in real-world conditions (heatwave + cold and humid)
Visible installation details: wall bracket, clearances and protection
This installation is a good example of "mechanical cleanliness": we see several choices that improve durability and comfort.
1) Installation on a wall bracket (instead of a floor slab)
The outdoor unit is mounted on a sturdy wall bracket , fixed to the brick wall. In urban areas, this is often preferable.
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We prevent snow from accumulating around the unit
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We reduce the risks associated with runoff water and ground frost.
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We free up space (balcony, passageway, narrow backyard)
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The unit is kept at a more accessible working height for maintenance.
2) Anti-vibration pads (blue pads) to reduce noise
Anti-vibration pads are clearly visible between the unit and the support. This seemingly simple detail has a real impact:
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less vibration transmission to the brick wall
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reduction of perceived noise inside (especially at night)
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Increased comfort for occupants… and for neighbors (important in densely populated areas)
3) Positioning under the soffit: protection, but clearances must be respected
The unit is installed near the soffit . This is a good strategy for partially protecting it from the elements, but it requires careful execution:
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maintain sufficient clearances for air intake and exhaust
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avoid "trapping" the unit in a very confined area
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ensure that cold air in heating mode (or hot air in cooling mode) does not recirculate
At AirGreen, we always check these points on site to avoid a drop in performance and overconsumption.
4) Protective grille on the heat exchanger side
A protective grille is visible on the side where the coil (heat exchanger) is located. This is a plus, especially in areas where there may be:
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narrow passage
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Risk of accidental impacts (furniture, tools, bicycles, building maintenance)
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projections (small debris, branches, objects)
Protecting the coil means protecting the efficiency of heat exchange — and therefore overall performance.
Why this approach works well in Montreal
Performance and comfort in Quebec's climate
A wall-mounted heat pump is often chosen to improve comfort without overhauling the building's entire mechanical system. But in Montreal, people want more than just air conditioning: they want a system that can perform well in humid conditions, in very hot weather, and when temperatures drop.
The result depends on two things:
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the right system (here Zephyr, residential wall-mounted format)
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Proper installation (support, drainage, clearances, vibrations, sealing of connections)
Water management: a critical issue
In heating mode, the outdoor unit may produce water during defrost cycles. For wall mounting, the following considerations must be taken:
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where the water will fall
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How to prevent ice from forming in a passageway
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How to protect the facade and sensitive elements (e.g., windows, thresholds, light fixtures)
In areas like Rosemont, this is particularly important because space is often shared, and surfaces can be close together.
What we systematically check at AirGreen
Although the photo mainly shows the outdoor unit, here is our complete installation logic (the one that makes the difference after 2, 5 or 10 years).
Key steps on the exterior
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anchoring the wall bracket in a suitable structure (and not “just in the brick”)
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Perfect unit upgrade (drainage + stability)
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anti-vibration pads correctly positioned
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Clearances respected for ventilation and service
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Clean routing of connections (covering if required, careful finishing)
Key steps on the refrigeration side
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A compliant vacuum draw, without compromise
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leak test (no micro-leaks)
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refrigerant charge in accordance with the line length
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Complete test in heating and air conditioning
Key steps in terms of comfort
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indoor head placement (air diffusion, living areas, noise)
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basic settings (modes, settings, fan speed)
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clear explanation to the customer for daily use (and to avoid costly mistakes)
Common mistakes to avoid (and which are costly)
In wall-mounted installations, the following creates problems in the medium term:
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Unit too low (snow + ice + obstruction)
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Lack of anti-vibration pads (humming noise in the wall)
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Insufficient clearances (air recirculation, reduced efficiency)
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Poorly designed drainage (ice, seepage, complaints from neighbors)
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Poor vacuum/sealing work (loss of performance, costly repairs)
Our goal at AirGreen: zero surprises , and an installation that remains efficient year after year.
The result: a clean, solid installation adapted to the Rosemont building
This Zephyr wall-mounted heat pump installation perfectly illustrates what is being sought in Montreal neighborhoods: a discreet system, well integrated into the brick wall, installed on a wall bracket with anti-vibration , protected and intelligently positioned under the soffit.
If you are in Rosemont–La Petite-Patrie , or elsewhere in Montreal (Plateau, Villeray, Ahuntsic, Ville-Marie, Verdun, Saint-Laurent, etc.), and you are looking for a reliable solution to air condition in the summer and heat comfortably in the mid-season, a well-chosen and well-installed wall-mounted heat pump can transform your daily life.
At AirGreen , we do things properly: diagnosis, sizing, installation, and service — with an approach adapted to the Montreal terrain.