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Installation d’une Gree — thermopompe murale R-32 à Mercier–Hochelaga-Maisonneuve
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Installation of a Gree — R-32 wall-mounted heat pump in Mercier–Hochelaga-Maisonneuve

A clean and robust installation on a brick facade, designed to last and for the comfort of a Montreal plex

At AirGreen , we work every day in plexes and condos across Greater Montreal. This project in Mercier–Hochelaga-Maisonneuve features a Gree wall-mounted heat pump (R-32 refrigerant) installed on galvanized wall brackets high up in a typical East Island courtyard. The goal: to provide efficient, quiet, and reliable heating and cooling without encroaching on floor space or obstructing access to the patio.

Why this choice is wise for Montreal, Laval, Longueuil, North Shore and South Shore

Brick buildings with exterior balconies and narrow passageways impose constraints: limited space, close neighbors, harsh winters. The modern R-32 wall-mounted heat pump perfectly meets these local realities: high efficiency, low noise footprint, heating performance in extreme cold, and simple maintenance. For households in Montreal, Laval, Longueuil, the North Shore, and the South Shore , it is a compact HVAC solution that reduces energy costs and improves comfort year-round.

Housing context and construction site constraints

  • Building type: Montreal plex with brick facade and balcony at the patio door level.

  • Access: interior courtyard, limited access; our teams plan handling and tools accordingly (ladders, harnesses, lighting management for work at the end of the day).

  • Height: Outdoor unit mounted on the floor , above snow level and away from debris; excellent protection against winter accumulations.

  • Neighborhood: respect clearances for air circulation and minimized noise pollution (choice of wall, fan orientation, mechanical damping).

  • Electrical safety: Outdoor disconnect box in the immediate vicinity, in accordance with good HVAC installation practices.

Choice of equipment

  • Brand: Gree , recognized for its high-performance and robust murals for the Quebec climate.

  • Technology: high-efficiency inverter compressor with R-32 (better environmental performance than R-410A and increased performance).

  • Capacity: selection sized according to the volume to be treated and the insulation of the accommodation (main rooms upstairs), in order to avoid over/under-sizing.

  • Noise: reduced noise level, relevant for Montreal courtyards and alleys .

Visible installation details and best practices

  • Galvanized wall brackets : reinforced load-bearing brackets, anchored in the brick with appropriate sealing, careful leveling and bracing. This solution:

    • releases the ground grip ;

    • protects against snow, salt and shocks ;

    • facilitates defrosting in heating mode.

  • Installation height : raised installation for optimal air release and evacuation of defrost water without splashing onto traffic areas.

  • Refrigerant connections : short and direct path; continuous anti-UV insulation ; curvature radius respected to protect the compressor.

  • Power supply : dedicated external disconnect , waterproof enclosure and sheathed wiring; circuit breaker rating according to nameplate.

  • Vibration management : controlled tightening, pads and fixing torque according to the manufacturer's template to prevent transmission to the brick walls.

  • Easy maintenance : guard above and around the unit for service access , coil cleaning and diagnostics.

Key steps in the AirGreen process

  1. Thermal validation and on-site survey (orientation, shading, clearances, structural constraints of the brick).

  2. Sizing the heat pump and checking the existing electrical circuit.

  3. Controlled drilling (short crossing towards the interior) with watertight bulkhead.

  4. Brazing / fittings under nitrogen, nitrogen leak test , then high vacuum < 500 microns.

  5. Commissioning : heating/air conditioning settings, partial and full load tests.

  6. Transfer to the customer : explanation of maintenance, defrosting, eco mode and seasonal planning.

Result for the family: discreet comfort and savings

  • Reliable heating in the off-season and in cold weather, with optimized defrost cycles.

  • Uniform air conditioning in summer, particularly pleasant for the upstairs rooms served by the indoor head.

  • Lower energy bills compared to electric baseboard heaters and older R-410A appliances.

  • Silence in the inner courtyard thanks to the fan and the thoughtful layout.

What we routinely monitor on brick plexes

  • Anchoring : brick requires suitable anchors and seals ; we do not accept improvised fixings.

  • Clearances : air inlet/outlet, corners and railings; avoid recirculation of hot/cold air near a balcony.

  • Defrost drain : tilt the unit and route the water to avoid creating ice on the access points.

  • Wiring : No exposed dangling loops ; everything is secured and protected.

  • Aesthetics : alignment, discreet passages and colors consistent with the facade.

Maintenance recommended by AirGreen

  • Two cleanings per year (inner head filters and rinsing of the outer coil).

  • Winter inspection : snow clearance, frost and drainage check.

  • Electrical check : disconnection terminal, tightening of terminals and condition of sheaths.

  • Periodic service visit : pressure/temperature measurement, inverter validation, updating of usage recommendations.

Grants and eligibility (to be checked depending on the period)

High-performance R-32 wall-mounted heat pumps with high heating efficiency may be eligible for energy efficiency assistance programs in Quebec. We guide our clients in Montreal, Laval, Longueuil, the North Shore, and the South Shore to prepare applications and maximize assistance when the unit's configuration and performance allow.

Practical advice for your project

  • Installation height : favor elevation on brackets to avoid snow and vandalism, especially in alleys.

  • Short route : install the outdoor unit near the main room to limit losses and optimize modulation.

  • Noise : Choose a quiet range and position the unit away from bedrooms.

  • Electricity : provide a dedicated line with disconnection accessible to the technician.

  • Winterization : clear the unit after storms; avoid closed shelters which suffocate the unit.

What this installation says about our method

This installation in Mercier–Hochelaga-Maisonneuve illustrates our approach: site analysis , anchoring quality , aesthetic care , testing and documented commissioning . The result is a clean, durable HVAC installation optimized for four-season comfort, compatible with the requirements of a dense and lively neighborhood.

Fast Fair

  • Type : Gree single-zone R-32 wall-mounted heat pump .

  • Support : galvanized wall brackets on brick, clearances respected.

  • Electricity : outdoor disconnect box , dedicated circuit.

  • Advantages : high efficiency, very cold heating , efficient air conditioning , low noise .

  • Areas served : Montreal, Laval, Longueuil, North Shore, South Shore .

Need a quote?

We offer a 100% free on-site estimate and clear recommendations (capacity, location, options). Our AirGreen team then plans a careful, compliant, and aesthetically pleasing installation, tailored to your brick building or condominium.

Integrated natural keywords: heat pump , wall-mounted air conditioner , HVAC installation , HVAC maintenance , Montreal , Laval , Longueuil , North Shore , South Shore .

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