In Rosemont–La Petite-Patrie, brick buildings predominate, and every HVAC installation must respect two realities: aesthetics (visible facade, close proximity to neighbors) and Montreal's climate (snow, ice, freeze/thaw cycles). For this residential project, our AirGreen team installed a Gree Charmo wall-mounted heat pump (mini-split) , paying particular attention to the wall-mounted installation of the outdoor condenser , the protection of the connections, and winter reliability.
The client's objective was simple: to gain year-round comfort , reduce heating costs during the shoulder seasons, and obtain stable air conditioning during the increasingly frequent heat waves in Montreal.
A clear solution: Gree Charmo wall-mounted heat pump
The Gree Charmo falls into the category of wall-mounted heat pumps: an indoor unit (wall head) that comfortably distributes air throughout the living area, and an outdoor unit (condenser) that handles heat exchange. This is a very popular approach in Montreal, particularly in brick buildings, because it allows for:
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to add heating and air conditioning without redoing the entire ventilation system of a house;
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to zone intelligently (main room, floor, condo, etc.);
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to benefit from excellent yields in mid-season (spring/autumn);
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to maintain a clean and discreet installation.
Choice of sector: why Rosemont–La Petite-Patrie is a “typical case”
In Rosemont, you often encounter:
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solid brick walls (solid, but demanding in terms of drilling and anchoring);
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narrow backyards and facades where location must be optimized;
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neighborhood constraints (noise, vibrations, water flow);
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winters where a poorly positioned outdoor unit can end up buried.
This is precisely why the way the outdoor unit is installed makes all the difference.
Observable installation details: an outdoor installation designed for winter
In the photo, several technical choices that improve performance and durability are clearly visible.
1) Condenser on wall bracket (raised)
The outdoor unit is mounted on sturdy wall brackets , rather than on the ground. In Montreal, this is a major advantage:
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less risk of being blocked by snow (accumulations and snowbanks);
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reduction of direct exposure to stagnant water on the ground in spring;
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better protection against impacts (shovels, snowblowers, traffic in the yard);
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simplified maintenance (clearing, inspection, cleaning).
It is an excellent choice for a brick facade, provided that the correct anchoring and load distribution are respected — which we systematically do.
2) Proper management of connections (piping + protection)
We can see a finishing sleeve (connection cover) that descends neatly: this is important for both aesthetics and protection:
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mechanical protection of pipes and wiring;
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cleaner finish (especially on the front);
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reduction of risks related to UV radiation and inclement weather.
3) Secure power supply with disconnect box
A disconnect switch is installed nearby. This is a key point for:
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safety during maintenance;
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electrical compliance;
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rapid intervention in case of diagnosis.
4) Air clearance and positioning
The condenser is positioned to maintain sufficient clearance around the grille and airflow. This detail directly influences:
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the actual efficiency of the machine;
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stability in heating in cold weather;
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the noise level (less turbulence, less resonance).
Our AirGreen approach: performance + discretion + longevity
Each installation of a wall-mounted heat pump like the Gree Charmo follows a rigorous logic, especially in dense urban environments:
Step 1 — Location Validation
We are evaluating:
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the solidity of the support (brick, joints, structure);
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sensitive areas (windows, bedrooms, neighborhood);
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the optimal route for refrigerated connections;
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water drainage (condensate and defrosting in winter).
Step 2 — Mechanical Installation
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Installation of wall brackets with anchors adapted to the support.
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Precise leveling of the outdoor unit.
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Vibration management (clean fixings, alignment, reduction of stress points).
Step 3 — Refrigeration connections and sealing
A mini-split hinges on the details:
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quality of flaring/crimping;
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compliance with tightening torques;
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serious vacuuming;
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leak tests before commissioning.
This is what protects performance… and lifespan.
Step 4 — Commissioning and adjustments
We configure the heat pump to ensure it is pleasant to use on a daily basis:
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modes and instructions;
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ventilation speed;
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behavior in heating (stability, comfort, noise);
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Simple maintenance recommendations.
Real comfort: what the customer gains on a daily basis
With a Gree Charmo wall-mounted heat pump, the most obvious benefit is stability :
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Air conditioning in summer: constant temperature, more comfortable dehumidification, fewer sudden changes.
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Mid-season heating : instead of waiting for the main heating to start, a gentle and economical comfort is maintained.
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Quality of life : less noise than an old window air conditioner, more space, more precise control.
In a neighborhood like Rosemont, where many homes have open layouts (living room/dining room) or floors with variable air circulation, a good wall-mounted heat pump quickly becomes a “comfort standard”.
Why wall mounting is often the best option in Montreal
One could place a condenser on the ground on a slab… but in practice, on many brick buildings and in snowy environments, wall mounting is more suitable:
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Defrosting in winter produces water: being elevated makes it easier to manage.
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Accumulations of snow can suffocate a unit placed on the ground.
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Variations in the terrain (freezing/thawing) can destabilize a poorly prepared base.
This is exactly the type of detail that makes an installation “work”... or remain reliable for years.
Recommended maintenance (simple, but crucial)
To maintain the efficiency of a wall-mounted heat pump, we recommend:
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Cleaning the filters of the indoor unit (regularly, especially if pets/dust).
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Seasonal check of clearance around the outdoor unit (leaves, snow, ice).
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Periodic professional maintenance: inspection, cleaning, checks, optimization.
Light but consistent maintenance helps to preserve:
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yield;
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silence;
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air quality;
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the lifespan of the components.
In summary: a clean, urban installation, designed for Quebec
This Gree Charmo wall-mounted heat pump installation in Rosemont–La Petite-Patrie illustrates exactly what we aim for at AirGreen: a high-performance system, installed cleanly, with an outdoor unit on a wall bracket adapted to snow and Montreal buildings, and secure connections.
When done right, a wall-mounted heat pump becomes a tangible investment: more comfort, more control, and appreciable energy efficiency throughout the seasons.