Installation of a Gree Charmo wall-mounted heat pump in Ville-Marie (Montreal): discreet comfort, serious performance
In this Ville-Marie condo, AirGreen installed a Gree Charmo wall-mounted heat pump high up to maximize air distribution, reduce noise, and preserve the aesthetics. A project typical of condominium realities in Montreal: discreet, efficient, and sustainable.
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In a Ville-Marie condo, every detail counts: aesthetics, quietness, available wall space… and above all, year-round comfort. This is precisely the context of this installation by AirGreen , where we installed a Gree Charmo wall-mounted heat pump to provide efficient air conditioning in the summer and stable heating during Montreal's colder months, without visually cluttering the room.
The photo shows a wall-mounted indoor unit installed high on the wall , very close to the ceiling, with a clean and minimalist integration—typical of central condo interiors. The goal: well-distributed airflow , quiet operation , and a final look that complements the decor.
Why a Gree Charmo wall-mounted heat pump is perfectly suited to condos in Ville-Marie
Ville-Marie is a mix of renovated historic buildings and modern condominiums. In both cases, the same constraints are often found:
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limited mechanical space (no generous technical room)
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strict co-ownership rules regarding location and exterior appearance (outdoor unit, walkways, noise)
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need for an energy-efficient system that replaces (or complements) expensive electric baseboard heaters
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Seeking comfort without drafts and noise (especially when working from home or at night)
The wall-mounted heat pump responds very well to these realities, and the Gree Charmo fits into this logic: a device designed to offer precise temperature control , efficient dehumidification and excellent daily comfort , all in a discreet format.
The type of system installed: wall-mounted heat pump (mini-split)
This is clearly a wall-mounted heat pump : the horizontal indoor unit, the blower flap and the high installation are typical of residential mini-splits .
This choice is particularly relevant in a condo, because:
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The installation is less invasive than a central system with ducts.
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the efficiency is generally higher than that of a traditional air conditioner
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Comfort is achieved very quickly: the room is stabilized in a few minutes.
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Maintenance is simple (and can easily be included in a maintenance plan)
What can be deduced from the installation (visual details and technical decisions)
Even if a photo doesn't show everything (especially the exterior), it still reveals several important elements about how the installation was designed.
1) High positioning: optimized air diffusion
The unit is installed near the ceiling , which is ideal for:
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project the air further into the room
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limit the cold/hot zones
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improve stratification in heating mode (and therefore actual comfort)
In other words: the air circulates better, and we avoid the feeling of “blowing directly on the occupants”.
2) Proper integration: a discrete result
The result is a clean, well-aligned installation in a minimalist interior. In a condo, this is essential: nobody wants a unit simply "placed there" without any regard for aesthetics. At AirGreen, we always aim for:
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a logical visual alignment (walls, ceilings, corners)
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an installation that avoids conflicts with light fixtures, doors, curtains
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a strategy to reduce the visual impact of refrigeration line connections
3) Presence of a wall control in the room
A wall-mounted control (thermostat/control unit) is a welcome feature: quick access, more intuitive management, and better usage discipline (consistent temperatures, appropriate modes, etc.).
Our AirGreen approach: a “clean” installation is not visible, but it is felt.
A wall-mounted heat pump isn't just about "hanging a head on the wall." Quality depends on factors that aren't always visible, but which make all the difference in terms of durability and performance.
Key steps that we systematically apply
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Site validation : clearances, airflow path, future maintenance
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Drainage management : slope, backflow prevention, reduction of drip and odor risks
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Refrigeration connection : quality of flares, tightening torque, sealing
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Vacuuming : essential to protect the compressor and ensure efficiency
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Operational tests : blowing temperature, stability, modes, noise, dehumidification
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Usage tips : useful settings, mistakes to avoid, maintenance frequencies
The result: a system that doesn't just "work", but that functions as it should , for a long time.
Summer/winter comfort in Montreal: what we're really looking for in practice
In Ville-Marie, we often experience stark contrasts: humid heat waves in summer, dry cold in winter, and unpredictable transitional seasons. A well-chosen and properly installed wall-mounted heat pump provides:
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Stable cooling without excessive power consumption
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Dehumidification (a major consideration in condominiums)
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efficient heating in the mid-season (and often for longer depending on the configuration)
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a more uniform feeling of comfort than with baseboards alone
And above all: we gain in quality of life. Less heavy air, fewer sudden changes, and a room that remains pleasant even when the weather changes rapidly.
Common mistakes in condo construction (and how to avoid them)
In condominium buildings, certain problems often recur — and these are precisely the ones we anticipate from the technical visit.
Poor location = daily inconvenience
A unit that's too low, too close to a corner, or facing the sofa... and you end up with an unpleasant draft. Our rule: comfort first , aesthetics second (and we usually succeed at both).
Improvised drainage = damage and service calls
A poorly designed drain can cause leaks, odors, or damage to walls. We always prioritize a reliable solution tailored to the specific needs of the condo.
Quick installation = reduced performance
Without proper vacuum sealing, testing, or calibration, a system might function… but wear out prematurely, consume more energy, or lose capacity. At AirGreen, we install systems designed to last.
Why this project in Ville-Marie reflects what we do at AirGreen
This Gree Charmo wall-mounted heat pump installation perfectly illustrates what we're aiming for in Greater Montreal:
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a solution adapted to the type of dwelling (condo)
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a clean, discreet, well-positioned installation
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real, measurable comfort that improves everyday life
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a professional, clear, and straightforward service
Whether you are in a condo near downtown, in an older renovated building, or in a recent condominium, our role is the same: to design and install an HVAC system consistent with your spaces, your habits and the climate of Quebec .
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).