Installation of a Zephyr wall-mounted heat pump in Plateau-Mont-Royal

More comfort in a Montreal plex: careful installation, designed for both winter and summer

At AirGreen , we prioritize HVAC solutions tailored to Montreal's architecture. In this Plateau-Mont-Royal plex , our team installed a Zephyr wall-mounted heat pump to provide economical heating in the winter and stable air conditioning in the summer, without sacrificing aesthetics or usable space. The indoor unit is discreetly positioned high on a wall, near a window facing the street, to maximize air diffusion in the living room.

Why choose a Zephyr wall-mounted heat pump for urban housing?

The wall-mounted heat pump is essential in buildings with compartmentalized spaces, typical of the Plateau plexes, for several reasons:

• High energy efficiency ( Energy Star eligible appliances), reducing electricity consumption compared to traditional convectors.

• Cold weather performance , with reliable heating capacity down to -25°C , essential in Greater Montreal.

• Quiet operation , welcome in rest rooms or teleworking areas.

• Precise control (remote control, programming, eco modes) guaranteeing consistent comfort .

• Eligibility for grant programs when combined with certified performance and compliant installation.

Thermal reading of the premises and sizing

We begin with a simplified load assessment : main room area, orientation, window quality, air infiltration, occupancy habits. In this plex, the main space is around 30–35 m² with generous windows. The chosen size is in the 9,000 to 12,000 BTU range to cover summer peaks while ensuring efficient supplemental heating in the off-season and winter, without the risk of short cycles.

Inner Head Implantation: Every Inch Counts

The interior wall has decorative moldings and a wall sconce on the left. We position the head a few centimeters from the ceiling , set back from the corner, in order to:

• leave sufficient upper clearance for air suction;

• avoid turbulence against the ceiling and the fall of cold air on the occupants;

• free the field of curtains and the rod above the window;

• maintain service access for filter maintenance.

The supply air flap is oriented toward the center of the room. In this configuration, the conditioned air naturally sweeps the living area and then returns through the sides of the unit, which evens out the temperature without drafts.

Refrigeration path and condensate management

The adjoining window allows for a short and clean route of the connections:

• Drilling carried out according to the template, with a slight slope towards the outside.

• Gravity drainage of condensates thanks to this slope (no pump required), limiting noise and maintenance.

• Insulated refrigeration lines (high density insulating annealed copper), protected by discreet, light-colored external capping .

• Communication and power cabling laid in the same technical path for a uniform finish.

In plexes, the route is generally towards the rear facade or the side yard , in order to respect the tranquility of the street and municipal regulations. We choose galvanized wall brackets or an anti-vibration slab depending on the available facade and accessibility for the service.

Acoustic and vibration considerations

The urban context requires special attention:

• Calibrated silent blocks under the condenser reduce the transmission of vibrations to the masonry.

• Minimal setback from neighboring windows prevents sound reverberation.

• The surfacing and leveling of the supports are checked to eliminate any long-term hum.

The result: operation that is barely noticeable to the occupants and the immediate vicinity.

Key steps of installation (AirGreen methodology)

1. Protection and preparation : tarpaulins, protection of moldings and checking of the dedicated electrical circuit (circuit breaker, wire gauge).

2. Installation of the interior support : anchors adapted to the support (wood/masonry), laser control of alignments.

3. Drilling and crossing : sheath, controlled slope, foam/air barrier sealing for waterproofing.

4. Refrigeration connections : clean bending, brazed welding if necessary, tightening torque with a dynamometer.

5. Vacuuming : deep vacuum until stabilization, leak test, then opening of the refrigerant fluid .

6. Functional tests : pressures, intensity, blown/return temperatures, defrost control in heating mode.

7. Finishing touches : exterior capping , UV collars, clearances around the condenser, circuit labeling.

8. Customer delivery : demonstration of the remote control, usage advice and HVAC maintenance schedule.

All of these steps ensure the system's durability and compliance with manufacturer standards —an essential condition for warranties.

Expected performance and everyday comfort

In air conditioning, the room quickly reaches the set temperature with a controlled humidity level , a crucial point during the heavy periods of July. In heating, the heat pump takes over from autumn and works efficiently down to negative temperatures, which reduces the load on the baseboards and improves comfort when waking up.

In urban housing, these gains translate into:

• Substantial energy savings compared to 100% resistive modes;

• Thermal stability without overheating near windows;

• Improved air quality thanks to built-in filtration and continuous circulation.

Recommended maintenance: simple and profitable

To maintain seasonal efficiency (SEER/HSPF), we recommend:

• Clean the filters every 4 to 8 weeks depending on use and ambient dust;

• Annual inspection (operating pressure, heat exchange, condensates);

• Clear the condenser of any obstacles (snow, leaves), with a free clearance of 30–45 cm.

Regular maintenance extends compressor life and preserves warranty eligibility .

Grants and Regulatory Compliance

Energy Star wall-mounted heat pump units are eligible for financial assistance (provincial and municipal programs) when installed by a licensed contractor and meet cold climate performance criteria. We support our customers in:

• verification of technical criteria (seasonal yields, nominal capacity);

• retention of evidence (AHRI numbers, technical sheets, detailed invoice);

• the assembly of the file until submission.

Special features of a construction site on the Plateau: what we anticipate

• Access and logistics : narrow exterior stairs, sometimes narrow alleys, need for a parking slot for installing the condenser.

• Masonry : old bricks, variable joints; we favor suitable mechanical anchors and, if necessary, a slab to avoid concentrated loads on fragile walls.

• Neighborhood : coordinated schedules, clean routing of cables and lines to minimize visual impact .

Our experience in the dense neighborhoods of Montreal, Laval and Longueuil allows us to anticipate these constraints and deliver a clean and durable installation.

Tips for maximizing savings

• Maintain a stable setpoint (e.g. 22–23°C in summer, 20–21°C in winter) rather than large variations.

• Use the dehumidification mode on heavy days to increase the feeling of comfort at the same temperature.

• Keep interior doors open when possible to promote air circulation.

• In winter, clear the condenser area of ​​blown snow and check the defrost water drainage.

What AirGreen delivers, beyond the device

We provide local expertise : understanding of old buildings, respecting finishes, comprehensive technical documentation, and after-sales service . Our team operates throughout Greater Montreal — Montreal, Laval, Longueuil, North Shore, and South Shore —with optimized installation times and fast service slots during peak seasons.

Project review

This Zephyr wall-mounted heat pump installation in a Plateau-Mont-Royal plex illustrates our approach: precise sizing, respectful integration of the interior architecture, short refrigeration path and gravity evacuation of condensates for simplified maintenance. The result is immediate comfort , lower operating costs and a sober aesthetic, perfectly aligned with the neighborhood life.