Installation of a Zephyr wall-mounted heat pump in Villeray–Saint-Michel–Parc-Extension

Precise comfort, minimalist installation and air diffusion designed for Montreal apartments

Housing context and objectives

In an apartment in Villeray–Saint-Michel–Parc-Extension , we modernized the interior comfort with a recent generation Zephyr wall -mounted heat pump with R-32 (A2L) . The client's expectations were clear: economical heating in spring and fall, stable air conditioning during heat waves, all without distorting the refined aesthetic of the living room. We chose a centered installation at the top of the wall , providing a uniform sweep across the entire room and excellent air intake.

Why a Zephyr R-32 heat pump here?

• Efficiency in cold climates : inverter compressor and heat exchanger optimized to maintain good capacity when the temperature drops below zero, typical of Greater Montreal .

• R-32 (A2L) : better volumetric performance and lower GWP than R-410A.

• Quiet operation : modulated fan speeds, ideal for an open-plan living room.

• Aesthetics : smooth casing, discreet instruction display on the front and regular air curtain thanks to the profiled shutters.

• Simplified maintenance : washable filters accessible from the front, clear diagnostics via the electronic card.

Target capacity : According to the load calculation, the treated area generally corresponds to 12–15 kBTU in this apartment format, subject to insulation and openness to adjacent rooms.

Key steps in HVAC installation

1) Thermal analysis and choice of location

At AirGreen, we start with a load calculation (envelope, volume, orientation, infiltration, glazing). The chosen location:

• maximizes sweep along the main wall and avoids direct blowing onto the sofa or table;

• respects the top and side clearances to ensure accurate measurement of the probes and easy access to the filters;

• prepares a short crossing to the outside, a guarantee of efficiency and reliability.

2) Drilling and refrigeration connections

• Wall crossing with sheath, vapor barrier and controlled slope;

• Insulated copper lines in pairs, anti-vibration mounting and compliant bending radii ;

• Discreet interior capping flush with the bottom of the unit for a clean finish;

• On the outside, a white UV-resistant trunking that follows the facade up to the condenser.

The path is deliberately short and straight (typically 5 to 7 m to the yard), which reduces pressure losses and keeps the compressor in its best efficiency zone.

3) Condensate management

We prefer a gravity drain with a continuous slope towards the outside. Advantages:

• no pump noise;

• minimal maintenance;

• almost zero risk of overflow if seasonal maintenance is respected.
  When gravity is not possible (length or obstacles), we integrate a silent micro-pump with anti-overflow contact . Here, the favorable wall configuration allowed us to maintain a reliable gravity flow .

4) Installation of the outdoor unit

On the courtyard side, we install the unit on raised galvanized wall brackets :

• ground clearance for snow;

• free air circulation at the rear and sides;

• easy access for defrosting and maintenance;

• if necessary, snow guard and awning without hindering recovery/insufflation.

5) Instrumented commissioning

Our protocol includes:

1. Flares made to the manufacturer's torque , visual inspection of the lips;

2. Nitrogen test (controlled pressure), then deep vacuum < 500 microns and stabilization;

3. Leakage control and evaporation/condensation temperature readings;

4. Setting of the setpoint , speeds, automatic scanning and silent night modes;

5. Checking the currents and electrical polarity on a dedicated circuit breaker.

Results observed: comfort and savings

Low-energy supplementary heating

In mid-season and during moderate cold weather, the heat pump provides an excellent energy consumed/heat delivered ratio ( COP often > 2 in actual use), which reduces the use of baseboards and stabilizes bills .

Uniform air conditioning

The horizontal sweep covers the width of the living room while the air intake at the top of the wall limits stratification . The result: fewer hot spots and a uniform feeling of freshness, even during the humid episodes of July and August in Montreal .

Discretion and aesthetics

The centered installation and slim chute blend into the decor. The front display allows immediate reading of the instruction , practical without having to have a remote control within reach.

Technical details that matter

Refrigerant R-32 (A2L)

• Increased performance through better volumetric capacity;

• Reduced GWP compared to R-410A;

• Compliance with A2L good practices (ventilation, tightening torques, absence of ignition sources during commissioning).

Electricity and protections

• Dedicated circuit according to nameplate, with external circuit breaker;

• Grounding verified, strain relief clips and clean routing to the panel;

• Overcurrent management using a suitable circuit breaker.

Acoustic

• Programmable silent mode;

• Silent-blocks on the external supports;

• Condenser orientation to minimize sound reflection to neighbors.

HVAC maintenance: the recipe for longevity

User Routine

• Clean the filters every 4 to 8 weeks during periods of use;

• Ensure that the drain remains free (no obstruction at the wall pass-through);

• Clear snow and objects around the condenser in winter.

Annual AirGreen Visit

• Thorough cleaning of the evaporator and condenser ;

• Checking the refrigeration parameters and the drain pump/drawing if present;

• Updated comfort settings and checked connection insulation .

Simple but regular maintenance preserves performance , lifespan and warranties .

Grants and eligibilities (benchmarks)

High-performance R-32 wall-mounted heat pumps that maintain their capacity in extreme cold may be eligible for assistance programs in Quebec. Eligibility depends on the exact model and certified performance. We support our clients in Montreal, Laval, Longueuil, the North Shore, and the South Shore to validate criteria and prepare applications.

AirGreen Tips for Optimal Results

1) Choose the right wall

A central wall that "sees" the entire living room prevents dead zones. Avoid blowing directly into a narrow hallway or a curtain.

2) Minimize the length of the bonds

A short path and few bends promote efficiency and reliability (less losses, less vibration).

3) Treat the drain

The slope must be continuous; in the absence of gravity, provide a silent micro-pump with safety.

4) Anticipate winter

Provide clearance around the condenser, adequate raising and snow protection if roof runoff may create snow drifts.

Frequently asked questions

• Type : Zephyr wall-mounted heat pump (recent R-32 range)

• Location : top of central wall, wide sweep of the living room

• Connections : short route, discreet interior chute, vapor barrier seal

• Condensates : continuous slope gravity drain (micro-pump option if necessary)

• Commissioning : nitrogen test + deep vacuum , silent night setting

• Maintenance : regular filters + annual AirGreen visit

AirGreen: the requirement for detail for Greater Montreal

We install and maintain wall-mounted heat pumps from Zephyr, Gree, Fujitsu, Sharp, Midea, Hitachi and other well-known brands. Our promise: accurate diagnosis , careful HVAC installation , instrumented commissioning and clear follow-up . Whether you are in Montreal , Laval , Longueuil , on the North Shore or the South Shore , we adapt the solution to your building and your lifestyle.