Installation of a Gree (R-32) wall-mounted heat pump in Villeray–Saint-Michel–Parc-Extension

An interior head perfectly aligned above the bay window: immediate comfort, silence and ultra-short refrigeration lines

Housing context and objectives

In a typical Villeray–Saint-Michel–Parc-Extension plex, the living room opens onto a large bay window overlooking a rear terrace. The owner was looking for a compact solution to cool in the summer , heat in mid-season , and stabilize humidity without weighing down the aesthetics of the room. We recommend and install a Gree (R-32) wall-mounted heat pump , a new generation with high efficiency , designed for Montreal homes where every centimeter counts.

Why a Gree (R-32) in this configuration

• High air conditioning and heating efficiency thanks to R-32 refrigerant , more thermally efficient and with reduced GWP compared to R-410A.

• Quiet operation : low speed modes suitable for living rooms and movie nights.

• Cold stability : compatible with Montreal winters for reliable heating support down to typical negative temperatures.

• Discreet display on the front indicating the instructions, useful from a distance without disturbing the decoration.

Placement logic: above the woodwork, in line with air circulation

We fix the head at the top , just above the wooden crosspiece and the slatted blinds . This positioning brings several benefits:

• Maximum range : the flow runs along the ceiling then back down into the occupied area, which evens out the temperature in the living room.

• No visual disturbance : the unit aligns with the joinery lines; curtains and blinds remain free.

• Clear maintenance access : front cover and filters accessible without moving the furniture.

Refrigeration path and condensate management

• Very short wall crossing to the outside (wall immediately behind the unit), which limits pressure losses and reduces line length .

• Priority gravity drainage : continuous slope of the condensate pipe to avoid any backflow or odor.

• Clear and discreet exterior capping , connections insulated against condensation and thermal bridges.

• Brazing under nitrogen , deep vacuum and documented leak test before commissioning to guarantee the durability of the circuit.

Installation of the outdoor condenser

In this type of backyard, we favor:

• Wall brackets or an anti-vibration slab near the crossing to keep refrigeration lines short ;

• Regulatory clearances for air intake and maintenance;

• Anti-vibration pads and spacers to prevent any resonance on the brick facade or balcony rail.

Electrical integration and compliance

• Dedicated circuit with rated circuit breaker and disconnect box within easy reach near the condenser.

• Protected cable routing ; watertight bulkheads; verified earthing.

• Respect the distances to woodwork, blinds and combustible elements according to the manufacturer's instructions.

Commissioning: Settings for fine comfort

• Calibrate the probe to match the temperature felt in the center of the living room.

• Orientation of the shutters :

  • in air conditioning , tilt slightly above the horizontal to carry the air along the ceiling and avoid direct blowing on the sofa;

  • in heating , more closed angle to deposit the heat at human height.

• Airflow : low to medium speed in the evening to maintain silence ; automatic mode during the day to monitor the solar gain from the bay window.

• Gentle dehumidification : maintains a comfortable humidity level without overcooling.

Result obtained

The heat pump quickly stabilizes the room, eliminating the stratification caused by the glass wall. In summer, dehumidification eliminates the heaviness; in spring and fall, the additional heat limits the start-ups of the main system. The noise level remains very low, allowing continuous use, especially at night.

Tips for using the large bay window

• Clear the blowing field : avoid high shelves or decorative covers directly under the unit.

• Leave the blinds open around the mouth to avoid breaking the lamination .

• In hot weather, aim for a set point of 23–24°C: the feeling of comfort comes mainly from the reduction in humidity .

• When heating, favor a gradual increase in order to maintain quiet operation .

HVAC Maintenance: Maintaining Performance

• Every 1–2 months in summer use: clean the filters to maintain airflow.

• Annually : cleaning of the turbine and evaporator , condensate flow test, checking of tightening torques and line insulation.

• Every 2–3 years : complete overhaul including condenser (coil, fan), setting and verification of seasonal performance.
  These actions maintain performance and extend the life of the equipment.

Grants and Eligibility

Recent R-32 wall-mounted heat pumps , with high efficiency and capable of operating in extreme cold , are often eligible for programs available in Quebec. We assist our clients in verifying the criteria and preparing the file, throughout Montreal , Laval , Longueuil , as well as on the North Shore and South Shore .

Key technical points of this installation

• Ultra-short refrigeration lines thanks to positioning just above the bay: minimized losses and preserved aesthetics.

• Reliable gravity flow of condensates, tested in long cycles.

• Acoustic management of the condenser by pads and spacers to prevent transmission into the balcony structure.

• Finishes : unit perfectly level, clean capping , stainless steel screws, no visible wires.

Common Mistakes Avoided

• Undersizing in very glazed rooms: we size the capacity taking into account solar gain and actual volume.

• Poorly adjusted shutters generating drafts on the occupants: precise orientation set when put into service.

• Poorly managed condensation : slope and anti-condensation insulation checked; no droplets on the woodwork.

• Exposed wiring or leaky holes: clean , durable finishes that comply with codes.

Why AirGreen

• Local expertise on plexes and condominiums in Greater Montreal: brick facades, narrow balconies, alley access.

• Selection of proven brands (Gree, Sharp, Fujitsu, Midea, etc.) in R-32/R-454B for long-lasting performance.

• Turnkey service : study, careful HVAC installation , instrumented commissioning , HVAC maintenance and support for subsidies . Our priority: stable comfort and controlled consumption , with integration that respects your decor.