Four-season comfort and impeccable finish in a Montreal plex
In a home in the Southwest , our team installed a Daikin wall-mounted heat pump to provide supplemental heating during the off-season and air conditioning in the summer. The home features an open-plan living area with an adjoining kitchen and a dark accent wall where the indoor unit fits neatly, a few centimeters from the ceiling. The client's goal: to achieve stable comfort in the main room without compromising aesthetics or increasing maintenance work.
Why Daikin for an apartment in Greater Montreal?
Choosing a Daikin is often the right choice for apartments and plexes in Greater Montreal thanks to:
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Inverter technology that finely adapts capacity, limiting on/off cycles and electricity costs;
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high seasonal efficiencies compatible with energy efficiency programs when the indoor/outdoor unit combination is Energy Star certified;
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controlled acoustics , essential in open living spaces;
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a clear remote control and temperature maintenance functions that simplify everyday life.
For a typical 25 to 40 m² open-plan home, we generally select a capacity of 9,000 to 12,000 BTU, adjusted according to sunlight, insulation level and internal gains. A load study systematically precedes installation: it avoids oversizing, a source of drafts and discomfort.
Installation details: clean, short, efficient
Location and air distribution
The unit is centered at the top of the living room wall. This position allows:
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even diffusion towards the kitchen and dining area;
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avoiding direct blowing onto the sofa;
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simplified maintenance (access to filters and the front panel).
We maintain clearances in accordance with the manufacturer's guidelines to optimize suction and avoid any recirculation of hot air to the ceiling. The alignment has been adjusted with a laser for perfect horizontality, essential on an accent wall where the slightest visual deviation is noticeable.
Drilling and refrigeration connections
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Through drilling with controlled slope for the drain;
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Reduced link length (direct path to the outside), which improves system performance and response;
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Continuous insulation of pipes to eliminate condensation;
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Communication wiring protected and marked for future diagnostics.
The internal support is anchored in the structure (uprights) using suitable dowels; a sealing gasket closes the wall passage and blocks air infiltration.
Condensate management: gravity-fed and discreet
Gravity drains are preferred to limit moving parts and noise. The slope is checked for level and tested with clean water before closing. When necessary, we add a vapor barrier at the outlet point to prevent odors from returning. Here, the drainage follows a short, invisible path from the living space.
Finish on dark wall
Finishing touches matter: on a midnight blue wall , every imperfection is obvious. We have:
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broken and fine repainting around the edges for a clean ceiling/wall connection;
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adjusted the cover so that the shadow cast does not reveal a gap between the unit and the support.
Site features and solutions
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Proximity to the kitchen : risk of suspended grease. We recommend more frequent filter maintenance during periods of intensive cooking and biannual inspection of the exchanger.
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Low ceiling typical of plexes: the high position remains possible while guaranteeing clearances for maintenance.
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Vibrations : use of damping spacers on the outdoor unit (installed on the courtyard side), and expansion loops on the connections to eliminate any sound transmission inside.
Commissioning: protocols and quality controls
Vacuuming is carried out down to 500 microns to ensure dehumidification of the circuit. We then proceed to:
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opening the fluid and checking the pressures;
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a leak test (soap + instrumented control);
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supply/return temperature measurements to confirm the expected difference;
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remote control calibration and mode configuration (Auto, Heating, Cooling, Dehumidification, Ventilation).
The customer receives a user guide in French and a demonstration: setting the target temperature, orientation of the shutter, time programming, and seasonal recommendations (for example, using the Drying mode after a humid day to stabilize the humidity without overcooling).
Results measured in the main room
As soon as it is switched on, we observe:
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rapid temperature stabilization thanks to inverter modulation;
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a significant reduction in humidity in cooling mode, a guarantee of perceived comfort;
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a low sound level to the point of listening to the television without increasing the volume.
The airflow directed along the wall avoids direct discomfort while sweeping the room. The user can memorize the angle of the shutter for summer and winter; the orientation slightly towards the ceiling in cold mode improves the air mixing.
HVAC Maintenance: What We Recommend
To maintain performance and longevity:
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vacuum and wash the filters every 4 to 8 weeks during periods of heavy use;
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Dust the evaporator with a dry brush (grid raised) and never spray any aggressive product;
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annual inspection by our technicians: tightening of connections, drain check, gentle cleaning of the exchanger, measurement of operating parameters;
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Outside, clear the condenser of vegetation, keep 30–60 cm free around it and raise it off the ground (drainage rail and snow guard if required).
Grants and Compliance
Energy Star -certified, low-temperature wall-mounted heat pumps may, depending on the indoor/outdoor unit combination, provide access to assistance programs . Our advisors verify the corresponding AHRI , explain the criteria, and prepare the supporting documents after installation. The unit is protected by the manufacturer's warranty (parts and compressor), supplemented by our installation warranties .
Common mistakes avoided on this job site
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Oversizing : the capacity was chosen based on load calculation, not just on surface area;
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Excessive refrigeration journey : the journey is short to limit losses;
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Uncertain drainage : slope checked and tested before closure;
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Insufficient fixings on dense walls: suitable anchors and pull-out control.
Why AirGreen for your HVAC installation in Montreal, Laval and Rives
At AirGreen , we design each HVAC installation as a complete project: thermal study, selection of the appropriate heat pump or wall-mounted air conditioner , careful installation, commissioning protocols and maintenance monitoring . Our teams operate in Montreal, Laval, Longueuil , as well as on the North Shore and the South Shore . This project in Le Sud-Ouest illustrates our approach: clean results on accent walls , optimized refrigeration path and practical advice provided to the client for lasting comfort, summer and winter.