A precision-designed interior design in a renovated Plateau plex: quiet comfort, clean finishes and strict compliance with HVAC regulations for four-season use in Montreal.
Customer context and performance objective
In a bright apartment in Plateau-Mont-Royal , the client was looking for a compact solution to air condition the living areas in the summer and provide efficient heating support in the winter, without requiring invasive work. We recommended a new-generation Gree R-32 wall-mounted heat pump , known for its high efficiency, stability at low temperatures and low noise levels both indoors and outdoors.
Internal head implantation: precision and discretion
Positioning and clearances
The interior head is placed at the top of the wall , close to a corner, a common configuration in Montreal plexes. We respect a ceiling clearance in accordance with the manufacturers' guides (typ. ≥ 10–15 cm) in order to:
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promote air intake in the upper part;
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ensure a jet of air that sweeps the room without unpleasant drafts;
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facilitate HVAC maintenance (opening the hood, removing filters).
The drilling template and the fixing plate are checked by laser. The level bubble confirms the horizontality of the assembly to avoid any parasitic noise and ensure the gravity flow of the drain.
Drilling, sheathing and sealing
The single rear hole is drilled to the correct diameter to accommodate the insulation, copper pipes, and communication cable. We install a sheath to protect the wall and connections. On the inside, the seal is redone neatly for a clean finish before painting; on the outside, the seal is made with freeze/thaw-resistant polyurethane sealant .
Drainage: priority to gravity
The condensate drain is configured as a gravity drain , with a minimum 2% slope to the discharge point. This approach reduces maintenance, avoids the risk of odors and eliminates the need for a pump—particularly relevant in homes where operating noise is desired.
Path of connections to the outside
Predictable length and route
In this "wall-to-wall" configuration, the total length of the refrigeration connections is estimated between 3 and 6 meters , varying depending on the location of the outdoor condenser on the rear balcony. The bending radii comply with the recommendations to preserve the integrity of the copper and limit pressure losses.
Insulation, taping and mechanical resistance
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Continuous insulation of the lines, sealed with tape to eliminate thermal bridges and prevent condensation.
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Retaining collars at the wall outlet to absorb vibrations and protect flare connections.
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Power/communication cable bundled with the tubes, for a compact and readable harness during maintenance.
Electricity, communication and protections
Dedicated circuit and disconnection
The heat pump is powered by a circuit dedicated to the panel, sized according to the nominal current and the length of the run. An accessible disconnect box on the outside facilitates service work. Tightening is carried out to the correct torque and the conductors are sized taking into account the permissible voltage drops.
Communication and compatibility
The communication cable is routed away from interference. The system supports silent and anti-cold air draft modes, useful during winter defrosting periods.
Commissioning and quality controls
High vacuum and sealing
We carry out a vacuum draw ≤ 500 microns , with maintenance to check the absence of humidity and residual air. After opening the valves, a leak test is carried out with the electronic detector.
Performance measures
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Blowing temperature in cold and hot mode,
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Delta T part/blowing,
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Pressures and intensity under partial load,
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Checking the defrost mode and remote control instructions .
A commissioning report is provided to the customer, including the recorded values and advice on optimal use.
Why choose a Gree R-32 for a Plateau plex
Performance and comfort
Gree R-32 wall-mounted series offer high seasonal efficiencies and uniform blowing . R-32 fluid reduces the required load and improves heat transfer, resulting in:
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lower energy costs ;
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stable operation during temperature variations typical of Montreal;
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an architecture ready for current and future environmental standards .
Winter heating and smart defrosting
The inverter compressor maintains adequate heating capacity at low temperatures . Combined with a clear and raised exterior installation, defrosting is efficient, limiting cycles and noise.
Eligibility for programs
Depending on the BTU capacity and certified efficiency levels, a Gree R-32 wall-mounted heat pump may be eligible for available assistance . Our team assists households in Montreal , Laval , Longueuil , the North Shore and the South Shore to put together a complete file.
What we have taken care of in this interior installation
Silence and ease of use
The internal fan operates on very quiet low bearings . Vibrations are eliminated upstream thanks to:
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the plate firmly anchored;
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perfect alignment of the blower unit;
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controlled drain slope (no gurgling).
Ready-to-paint finishes
The plasterwork around the wall crossing is smooth and ready to receive the client's finishing paint . Aesthetically, the headboard blends into the ceiling line without any visible excess thickness.
Simplified maintenance
The filters can be removed in seconds. We explain to the customer the ideal cleaning frequency (every 4 to 8 weeks depending on usage) and the visual checkpoints:
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battery cleanliness;
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drain flow ;
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absence of sound anomalies.
AirGreen Tips for a Wall-Mounted Header Near the Ceiling
Best practices
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Maintain ≥ 10–15 cm of overhead clearance for proper admission .
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Avoid obstacles (curtains, cornices) in the first meter of blowing.
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Provide a hatch opening or sufficient space above for maintenance .
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Choose a smart self-ventilation mode to stabilize indoor humidity in summer.
Pitfalls to avoid
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Drain without slope or multiple bends: source of odors and overflows.
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Shared electrical connections: the heat pump requires a dedicated circuit .
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Wall passage without sheath : risks of abrasion and infiltration.
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Unit too close to the ceiling : loss of performance and increased fouling.
Results for the client
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Rapid air conditioning of living areas, soft and even blowing .
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Effective supplemental heating during the off-season and winter support.
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Minimal noise thanks to rigid mounting, adjustable bearings and night mode .
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Aesthetics integrated into the renovation, with clean finish and easy access to filters.
Recommended maintenance plan (annual)
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Cleaning the filters and turbine.
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Light disinfection of the evaporator to limit allergens and odors.
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Inspection of connections, current measurement and verification of inverter parameters.
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Drainage test and interior/exterior seal control.
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Updated maintenance log useful for warranties and efficiency programs.
AirGreen: your HVAC partner in Greater Montreal
We carry out careful HVAC installations in plexes and condos in the Plateau-Mont-Royal , but also in Montreal , Laval , Longueuil , on the North Shore and the South Shore . Our value: detailed engineering , quality installation , administrative support and responsive after-sales service .
Project summary sheet
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Location : Plateau-Mont-Royal (Montreal) .
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Type : Gree wall-mounted heat pump ( R-32 generation).
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Installation : high interior head, near a corner; rear drilling with sleeve ; gravity drain ; ready-to-paint finish.
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Connections : 3–6 m estimated, insulated and fixed; compact beam outwards.
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Objective : silent air conditioning + reliable heating , controlled consumption, simple maintenance.
For a similar project in the Plateau , Laval , Longueuil , North Shore or South Shore , our team offers a technical assessment and recommendations adapted to your home and your lifestyle.
Useful keywords
heat pump , wall-mounted heat pump , wall-mounted air conditioner , HVAC installation , HVAC maintenance , Montreal , Laval , Longueuil , North Shore , South Shore .