In some Westmount buildings, a wall-mounted heat pump isn't installed the same way as in a new condo. Here, we're talking about an interior with a distinctive character: wood moldings, large paned windows, textured walls, existing radiators, and a layout that imposes a very real constraint… comfort must be improved without altering the character of the space and without creating noise pollution.
This is exactly the type of project where the AirGreen team excels: integrating a modern HVAC solution into a more “classic” architectural environment, with a clean finish, well-thought-out air distribution and a discreet result.
The context: a heritage site, very real needs
The photo shows a wall-mounted indoor unit installed high above a light fixture, between two large windows. The space evokes a gathering area (benches, radiators, wood paneling) where one might want to:
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Cooling effectively in summer despite solar heat gain through windows
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Stabilize the temperature during periods of fluctuating occupancy (presence/absence of people)
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Reducing discomfort related to temperature variations and “too hot/too cold” zones
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Maintaining a quiet and pleasant environment
And above all: preserve the aesthetics. In this type of place, a visible and “technical” installation can ruin the visual harmony.
Type of unit installed: wall-mounted heat pump (mini-split)
The format clearly corresponds to an indoor wall unit (mini-split): a horizontal white head, installed high up to promote good air circulation and better airflow range.
This type of system is ideal when you want to:
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Quick comfort
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Precise control (thermostat, remote control, modes)
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A solution that doesn't require major pipework.
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A very efficient supplementary heating option in the mid-seasons (and often longer)
Brand and model: Gree Charmo (brand name provided manually)
For this project, the machine installed is a Gree Charmo .
When the exact model is not legible in the photo, the most professional approach is to remain consistent with the range: we are talking about a wall-mounted inverter heat pump, designed to offer excellent performance and stable operation, with modulation that avoids aggressive “ON/OFF” cycles.
The installation details that stand out (and really matter)
1) Positioning: high on the wall, between the windows
In a space like this, positioning is strategic. Positioning your head at a height allows you to:
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improved air circulation in the room
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less sensation of drafts for the occupants
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a more visually “blended” result into the wall structure
Being between two windows is also a smart choice: it balances the areas more exposed to heat gain (sun) and avoids blowing directly onto a sensitive area (for example towards a passageway).
2) Aesthetic management: discreet integration
What we're looking for (and what we deliver at AirGreen) is an installation that doesn't scream "HVAC construction site." In this type of environment, that means:
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The refrigeration line outlet is designed to minimize visual impact.
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the most direct and cleanest possible route to the outside
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neat seals (important for both aesthetics and waterproofing)
3) Coexistence with existing heating (radiators)
We see radiators (hydronic or hot water heating) already in place. The Gree Charmo wall-mounted heat pump often plays one of these roles:
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main air conditioning in summer
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High-efficiency supplemental heating for autumn/spring
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stabilization of uncomfortable areas, even in winter (depending on the overall configuration of the building)
The advantage: the existing system is retained, while adding a layer of modern comfort, more precise and more economical over several temperature ranges.
Why a Gree Charmo is particularly suited to this type of space
Even in older buildings, modern expectations remain: comfort, quiet operation, and efficiency. A wall-mounted heat pump like the Gree Charmo meets these requirements thanks to key features:
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Inverter technology : stability, better efficiency, more constant temperature
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Acoustic comfort : crucial in a place where quiet matters
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Precise control : ideal for adjusting according to actual occupancy
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Dehumidification in summer: a huge plus in larger buildings where humidity can persist.
AirGreen precautions during installation (what makes the difference)
Wall and anchor assessment
A textured/plastered wall in an older-style building can conceal various structural elements. Ensure that the indoor unit is securely fixed.
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perfectly solid
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without vibration
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durable over time
Condensation drainage: zero improvisation
Air conditioning naturally produces water (condensation). Drainage is planned:
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with correct slope
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protected against reflux
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discreet, without risk of leaving marks on the walls
Refrigerated transport and sealing
A clean installation is also a high-performing installation:
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carefully crafted connections
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pressure and resistance tests
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rigorous commissioning to ensure performance and longevity
Real comfort: what occupants notice after installation
In a space like this, the benefits are quickly felt:
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More uniform temperature (fewer hot/cold "pockets")
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Improved perceived air quality in summer thanks to dehumidification
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Effective cooling without turning the place into a “draft”
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Discreet operation: you forget the machine is even there… and that's exactly the point.
Recommended maintenance (simple, but essential)
To keep your Gree Charmo performing well year after year:
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Cleaning or rinsing the filters (every 4 to 8 weeks during periods of use)
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Keep the area around the unit clear
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Annual inspection (pressure, drainage, efficiency, cleanliness of the heat exchanger)
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Schedule a professional maintenance check if the usage is intensive (frequented places).
At AirGreen, we always emphasize: a wall-mounted heat pump, even an excellent one, remains a mechanical system. Minimal maintenance equals performance, quiet operation, and longevity.
Why choose AirGreen for this type of installation (Montreal, Westmount, and surrounding areas)?
In neighborhoods like Westmount , Outremont, Ville-Marie, or the Plateau, HVAC installations must often comply with:
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a refined interior aesthetic
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building constraints
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a superior finish requirement
Our approach:
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clear and realistic recommendations
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clean, safe, sustainable installation
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attention to detail (visual + performance)
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Comfort-oriented service, not a "quick sale"