Installation of a Zephyr (R-32 series) wall-mounted heat pump in Sainte-Dorothée (Laval)

An exemplary performance by AirGreen in Laval

At AirGreen , we transform living spaces with rigorous and sustainable HVAC installations . This project in Sainte-Dorothée (Laval) perfectly illustrates our approach: precise sizing, clean execution and documented quality control, for a latest-generation Zephyr wall-mounted heat pump (R-32) offering immediate comfort in summer and mid-season, and significant savings throughout the year.

Client context and objectives

Our client was looking for a compact, quiet, and energy-efficient solution for an open-plan living area. The priorities we established together were:

• Stable summer/winter comfort , without cold drafts.

• High energy efficiency and low GWP refrigerant (R-32).

• Discreet installation, easy HVAC maintenance , and a clear warranty.

• Compatibility with grant programs applicable to high-performance wall-mounted heat pumps in Montreal, Laval, Longueuil, North Shore and South Shore (according to current criteria).

Why Zephyr (R-32 series) for this home?

The Zephyr R-32 wall-mounted range meets the essential criteria of an urban or suburban home in Greater Montreal:

• High seasonal efficiencies (competitive SEER/HS/SCOP) to reduce electricity bills.

• Extreme cold compatibility on recent capacities, to maintain performance when the mercury drops.

• Quiet operation : very low interior noise level, ideal for bedrooms and living rooms.

• R-32 : modern refrigerant, reduced charge and better coefficient of performance than R-410A.

Sizing and preparation

First of all, we validate the sizing in BTU/h using:

• the surface area and volume of the room;

• insulation (walls, roof, windows) and solar orientation;

• the presence of heat-generating devices;

• the occupants' temperature preferences.

This calculation avoids the two classic pitfalls: an oversized unit (short cycles, discomfort, premature wear) or an undersized unit (lack of power at peak heat/cold).

Refrigeration path and discreet integration

We favor a direct route between the interior unit and the exterior:

• Single clean drilling (≈ 60 mm) with bulkhead and white cover matching the wall.

• Insulated refrigeration lines (typically 1/4"–3/8" depending on capacity) and 14/4 communication installed according to the Code.

• Condensate drainage by gravity when optimal; failing this, silent condensate pump with safety shut-off.

• Careful sealing and vapor barrier to prevent any infiltration of air or moisture.

Power supply and compliance

Our teams coordinate or validate:

• the dedicated circuit (often 208/230 V, 15–20 A depending on capacity) on the appropriate circuit breaker;

• grounding and external protection (switch/lock) when required;

• compliance with CSA standards and the Quebec Electrical Code .

Key steps in AirGreen installation

1. Protection of surfaces and tracing of installation axes.

2. Perfectly level wall bracket for reliable condensate drainage.

3. Drilling and installation of the crossing kit , insertion of the lines and the drain.

4. Connections brazed under nitrogen, leak test and deep vacuum (≤ 500 microns) with vacuum resistance.

5. Opening the valves , launching and calibration (fan speed, oscillation, mode).

6. Functional checks : suction/blowing temperatures, intensity, noise, remote control and Wi-Fi if applicable.

7. Finishing : aligned hood, seals, documentation and usage instructions.

Quality control: figures that speak for themselves

At commissioning, we measure the blowing in air conditioning mode; here, a value of ≈ 10.7 °C at the outlet indicates efficient heat exchange and a healthy refrigeration circuit. We also record:

• the ambient air/blowing differential ;

• stability of intensity under load;

• line temperature to confirm superheat/subcooling within manufacturer's tolerances.

Result for the occupant

• Rapid cooling of the main area, without unpleasant draft effects thanks to the correctly oriented motorized shutter .

• Thermal uniformity : the room reaches the setpoint without oscillations.

• Silence : the unit is forgotten, even in the evening.

• Aesthetics : discreet installation, aligned hood, no unnecessary protrusions.

Recommended HVAC Maintenance (and Why It's Crucial)

Annual maintenance protects performance and warranty:

• Clean filters (1–3 months depending on dust/pets) to maintain airflow and efficiency.

• Gentle washing of the internal exchanger and inspection of the drain to avoid overflows.

• Checking the outdoor condenser (clean fins, clearances) and defrosting in cold season.

• Electrical check (terminals, currents) and firmware update if the unit is connected.

Pitfalls to avoid (AirGreen feedback)

• Undersize an open area: the machine will run at full speed without reaching the setpoint.

• Neglecting to drain condensate : poor leveling causes leaks and odors.

• Drill too far from the head: excessive lengths = pressure losses and compromised aesthetics.

• Ignore environmental noise : Poor flow direction or poorly leveled support can induce vibrations.

Grants and Eligibility

High-efficiency R-32 wall-mounted heat pumps are generally eligible for various assistance programs when they meet recognized performance thresholds. We assist our clients in Montreal, Laval, Longueuil, the North Shore, and the South Shore to verify eligibility and prepare the file (detailed invoices, specifications, compliance photos).

Deadlines, guarantees and service

• Quick appointment : technical visit, electrical validation and installation plan.

• Installation generally takes one day for a standard wall head.

• Manufacturer's warranty on parts and compressor, and AirGreen warranty on labor as per contract.

• Local after-sales service : continuously trained technicians, parts and consumables available in Quebec.

Why choose AirGreen for your installation in Montreal and surrounding areas?

• HVAC specialists in Greater Montreal (Montreal, Laval , Longueuil, North Shore and South Shore ).

• Controlled methodology : load calculations, documented vacuum draw, test protocols.

• Transparency : photo/measurement report upon commissioning, clear usage and maintenance advice.

• Selection of proven brands : Zephyr, Gree, Fujitsu, Sharp, Midea, and other recent ranges in R-32 / R-454B .

Instructions for use for optimal comfort

• Instructions : in summer, aim for 23–24°C, fan on Auto to let the machine manage the flow.

• Flap orientation : slightly upwards to circulate the air without blowing directly on the occupants.

• Dehumidification mode in humid weather for increased comfort without overcooling.

• Open doors to adjacent areas when you want to extend the comfort.

What if you plan multiple zones?

We offer MultiZone solutions when multiple rooms need to be air-conditioned/heated independently. We validate:

• aggregate power and line lengths ;

• the location of the heads to avoid air recirculation;

• electrical management (cable section, circuit breakers, communication boxes).

In summary
This Zephyr wall-mounted heat pump installation in Sainte-Dorothée (Laval) demonstrates the benefits of careful integration: immediate comfort, high efficiency thanks to R-32 , impeccable aesthetics and measured quality control (blowing measured at ≈ 10.7 °C in air conditioning). For a similar project in Montreal, Laval, Longueuil, on the North Shore or the South Shore , we take care of the study, installation and monitoring so that your system delivers its full performance, sustainably.

Areas served
Montreal (all boroughs), Laval (Sainte-Dorothée, Chomedey, Vimont, etc.), Longueuil , North Shore (Terrebonne, Boisbriand, Deux-Montagnes, Repentigny, etc.) and South Shore (Brossard, Boucherville, La Prairie, Saint-Lambert, etc.). Contact us to confirm availability and deadlines.