Precise comfort in a Montreal plex: our careful installation, designed for silence, aesthetics and seasonal efficiency.
Context: a typical Rosemont living space that deserves 4-season comfort
In this renovated apartment in a plex-style building in Rosemont–La Petite-Patrie , the living room opens onto the kitchen and dining room. It features an ornate ceiling, wood moldings, and pendant lighting above the table, with a patio door leading to the backyard. Our clients' goal: to stabilize the temperature of this main space, limit humidity fluctuations in the summer, and reduce heating costs during the off-season, without disrupting the interior aesthetic.
Why the Zephyr wall solution meets the need
We recommend a Zephyr wall-mounted heat pump for its responsiveness, quiet operation, and ability to finely modulate power. In this type of home, the high-mounted indoor head creates a uniform airflow across the open space, while the variable-speed outdoor compressor optimizes energy consumption.
Key benefits:
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Heating and air conditioning in a single unit, ideal for Montreal where cool days alternate with heat waves.
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Inverter modulation to maintain a stable temperature and reduce on/off cycles.
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Improved filtration to limit dust and pollen during transitional seasons.
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Low noise level for discreet comfort in the dining area and living room.
Positioning of the inner head: precision and aesthetics
The Zephyr interior headboard is installed above the opening between the living and dining rooms, approximately 2.3–2.4 m from the floor. This height ensures:
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a jet of laminar air that slides under the ceiling and extends far into the open area;
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avoiding air fallout on seated occupants;
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a harmonious visual integration under the decorative ceiling.
Our team fixes the wall plate to a solid structure (detection of studs, appropriate anchors), adjusts the laser level and reserves the service space for future maintenance (HVAC maintenance) : side and under-unit clearances in accordance with technical guides.
Refrigeration path and condensate management
The wall supporting the headboard opens onto the exterior via the patio door. We drill an insulated hole of approximately 65 mm with a slight slope for water drainage. The refrigerant connections and the communication cable use this passage, then are capped with white UV capping on the outside for a clean finish.
The condensate drain is gravity -fed, eliminating the risk of noise and pump maintenance. An anti-odor siphon and a discreet outlet prevent streaks on the exterior cladding.
Installation of the outdoor unit and protections
On the courtyard side, the Zephyr outdoor unit is mounted on anti-vibration brackets at a safe height above the snow level. This configuration:
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improves defrosting in cold weather,
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limits solid-borne noise in the structure,
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facilitates air release (inlets/outlets) to maintain nominal efficiency.
The connections are carefully crimped and sealed ; we proceed to deep vacuum drawing until a stable level is reached, followed by a leak test and additional charging if necessary depending on the total length of the lines.
Power supply and compliance
We connect the unit to a dedicated circuit breaker in accordance with the Quebec Construction Code. The outdoor power wiring is installed in UV- and impact-resistant conduit. A disconnect box is installed near the outdoor unit to allow for safe maintenance.
Commissioning and fine-tuning
When switching on, we validate:
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pressures and temperatures (superheating/subcooling),
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airflow and orientation of the shutters to cover the open area without creating annoying currents,
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calibration of the interior probe to avoid premature stops near the ceiling,
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Updated defrost settings (heating mode) adapted to the Montreal climate.
Customers receive a user guide and our recommended settings: ventilation on auto , shutter on gentle horizontal sweep in summer, shorter amplitude in winter to avoid directing hot air towards the ceiling. We also program an automatic restart after a power outage.
Result: immediate comfort, lasting sobriety
From the first week, the temperature in the living room stabilizes; the feeling of humidity decreases during warm evenings thanks to progressive dehumidification . In mid-season, the heating function reduces the use of electric baseboard heaters, with a significantly higher COP in the ranges of +5 °C to −5 °C. This efficiency gain helps reduce bills while improving acoustic comfort.
HVAC maintenance: simplicity and regularity
To maintain performance, we offer annual HVAC maintenance :
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cleaning and disinfection of the interior coil,
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checking the tray and drain,
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fan dusting,
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control of the outdoor unit (exchanger, fan, connections),
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validation of operating parameters.
At home, we recommend rinsing and drying the filters every 4 to 8 weeks during peak seasons. A clean filter protects the heat exchanger, reduces consumption, and maintains healthier air.
Best practices for use in a Montreal plex
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In summer , set the setting to 23–24°C with Auto mode; avoid excessive night/day differences to avoid overworking the machine.
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In winter , favor a stable setting (20–21°C in the living area); use the heat pump's heating mode and leave the baseboards on as a backup during rare peaks of intense cold.
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Keep clearance around the outdoor unit (snow, vegetation).
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Schedule a maintenance reminder in the spring to prepare for the warm season.
Grants and Eligibility
Depending on the specific configuration and performance of the installed Zephyr model (capacity, seasonal efficiency, low temperature operating range), the project may be eligible for assistance offered periodically by provincial and municipal programs. We support our clients in verifying criteria , assembling supporting documents and scheduling filings. Our team monitors the progress of the programs for Montreal, Laval , Longueuil , North Shore and South Shore to optimize the administrative setup.
What we bring to AirGreen
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Installation expertise in residential areas : protection of surfaces (floors, moldings), clean drilling, careful finishing.
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Rigorous sizing : evaluation of internal loads (cooking, sunlight) and air distribution to avoid “dead zones”.
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Local after-sales service : usage advice, planned maintenance, availability during peak periods.
Key technical points of this installation
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Interior head centered above the passage between living and dining room: uniform coverage of the open area.
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Gravity drain integrated into the drilling, limiting maintenance.
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Short, hooded path to the outside: minimized pressure losses, preserved aesthetics.
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Outdoor unit on anti-vibration brackets at the rear: snow clearance and better acoustic comfort.
What's next?
We monitor performance throughout the seasons. If occupants wish to extend comfort to the bedrooms, the same Zephyr range or a multi-zone can be added later, reusing part of the route and maintaining the consistency of the installation.
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