Precise comfort and even diffusion: our HVAC installation of a Zephyr wall-mounted head (R-32) in a bright apartment in Côte-des-Neiges–Notre-Dame-de-Grâce
Project context and client expectations
At AirGreen , we are working in a dual-aspect apartment in Côte-des-Neiges–Notre-Dame-de-Grâce . The occupants want efficient cooling in the summer, comfortable additional heat in the spring and fall, and a discreet and quiet installation . The main room opens onto a central hallway; air circulation must therefore remain gentle to avoid creating cold air corridors near the passageways.
We recommend a recent Zephyr wall-mounted heat pump that runs on R-32 refrigerant : a robust choice with high seasonal efficiency and a reduced carbon footprint compared to older generations of R-410A. The Zephyr indoor head features a sleek front panel, central setpoint display, and a wide, multi-louvered air vent.
Sizing and logic of choice
Before proposing the capacity, we evaluate: surface area (approximately 28–32 m² for the living area), ceiling height, orientation, wall insulation and occupancy habits. The thermal profile indicates a 12,000 BTU solution (typical range for this volume), capable of covering the living room and supplying part of the hallway and the open kitchen.
Why this configuration?
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Inverter modulation: maintaining the setpoint with low variations, without overconsumption;
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Balance between blowing range and noise level;
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Compatibility with the criteria of energy efficiency programs when they apply to the building;
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Easy access to filtration for regular HVAC maintenance by occupants.
Interior installation: above the passage, without direct air current
We place the Zephyr head in the upper part, above a passage , with sufficient clearance from the ceiling for good air intake. This position allows:
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a sweep of the room without blowing directly on the occupants;
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a longitudinal diffusion which follows the circulation axis towards the adjacent spaces;
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easy access to filters for cleaning.
The plate is anchored with dowels adapted to the support. The unit is perfectly plumb , which guarantees a regular flow of condensate and a quiet operation. The shutters and vanes are adjusted to create a wide cone of air, oriented towards the main volume rather than towards the door sill.
Refrigeration and drilling
We favor a direct rear drilling (“back-to-back” configuration) to limit the length of copper, reduce pressure losses and accelerate responsiveness. The wall-to-wall passage is sealed, insulated and then capped on the outside with a clean cover. The total length of connections is contained (approximately 2 to 3 m), which improves efficiency and simplifies maintenance.
The brazing is carried out under nitrogen flushing to prevent internal oxidation. After crimping to the recommended torques, we apply a high vacuum until a stable residual pressure is reached, then we open the valves and check for leaks.
Condensate management: priority to gravity
In this configuration, the condensate is evacuated by gravity , silently, with a constant slope and a passage protected against shocks. When lifting is necessary (unfavorable configuration or long distance), we offer a silent pump with a non-return valve. Here, the topography allows the most reliable and simplest solution.
Power on, settings and acoustic validation
Once the power supply has been checked (dedicated circuit, adequate gauge, tightening checked), we proceed with commissioning:
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Current measurement and voltage control;
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Verification of ΔT in cooling and auxiliary heating;
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Mode settings: Auto/Cool/Heat/Dry, timer and auto restart;
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Fine adjustment of the blowing to avoid drafts at the passage.
The front display allows you to check the setpoint and operating status at a glance. Within minutes, the room reaches the desired temperature, then the unit modulates to low speed; the noise level drops significantly, which is ideal for everyday life and quiet evenings.
Results: summer comfort and winter support
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In summer, the Zephyr operates as a very economical wall-mounted air conditioner ; its dehumidification greatly improves perceived comfort without the need to excessively lower the setpoint.
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In mid-season, Heat mode provides efficient support, reducing the need for the main heating system.
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Inverter modulation limits on/off cycles , extends component life and stabilizes temperature.
Finishes and aesthetics
The interior finish remains discreet: thin line cover, clean seal, invisible wiring. The unit, installed above the passage, frees up the walls of fittings and respects the minimalist aesthetic of the apartment. We provide the client with the installation file with serial number , installation photos and maintenance instructions.
HVAC Maintenance: Maintaining Long-Lasting Performance
We recommend a simple and effective program:
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Filters : vacuum/wash every 4 to 6 weeks during periods of intensive use;
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Turbine and tank : periodic cleaning/disinfection to prevent odors and biofilm;
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Annual inspection : pressures, evaporation/condensation temperatures, electrical tightening, sealing, condition of the line cover;
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Exterior clearance : keep the unit free of any obstructions (vegetation, snow, objects).
Rigorous maintenance protects the exchanger, maintains air quality and ensures consistent seasonal performance .
Good usage practices
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Realistic setpoint: 23–24°C in summer, 20–21°C for heating support;
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Allow the device to modulate rather than switching off/on frequently;
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Direct the flow towards the volume to be treated, never directly onto people;
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Keep interior doors open to promote partial transfer of fresh air.
Mistakes to avoid
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Installing a head too close to the ceiling or a lintel: air intake deteriorates;
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Obstruct the unit with tall furniture or heavy curtains;
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Forgetting to maintain filters: consumption increases and comfort drops.
AirGreen deadlines and process
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Technical visit and detailed estimate (dimensioning, routing, options);
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Planning and procurement;
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Installation of the Zephyr head and connections (often in half a day for a single zone);
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Commissioning with measurements, shutter adjustments and express training in use;
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Follow-up : assistance with incentive procedures when the building and device meet the criteria, and scheduling maintenance appointments.
Grants and eligibility (according to criteria)
Recent, high-efficiency R-32 wall-mounted heat pumps may be eligible for energy efficiency incentives when official thresholds are met (performance, building configuration, usage). We help our clients build a clear case: proof of purchase, photos, installation certificates.
Why AirGreen for your project in Greater Montreal?
Our team installs, maintains and modernizes HVAC systems throughout Montreal , Laval , Longueuil , on the North Shore and the South Shore . Our signature: correct sizing, impeccable finishes, respect for clearances, measured commissioning and responsive after-sales service . Depending on the architecture of the home, we offer the right solution: wall-mounted heat pump , wall-mounted air conditioner , multi-zone, cassette or ducted.
In short : in Côte-des-Neiges–Notre-Dame-de-Grâce, the installation of a Zephyr R-32 wall-mounted heat pump, installed above the passageway with a short cooling path and gravity evacuation, provides stable comfort all year round, a neat aesthetic and controlled energy savings. A project by AirGreen, designed to last.