Installation of a Gree R-32 wall-mounted heat pump in Rosemont–La Petite-Patrie

An upgrade designed for Montreal winters, discreet, clean and ready for grants

In a typical brick plex in Rosemont–La Petite-Patrie , the owners wanted to modernize their comfort with a high-performance, quiet, and energy-efficient wall-mounted heat pump , without adding bulk to the facade. Our recommendation: a Gree outdoor unit with R-32 (A2L) refrigerant , paired with an indoor wall-mounted head in the living room for supplemental heating in winter and air conditioning in summer. The AirGreen approach favors clean integration, short routes , and long-lasting protection of connections.

What we install, and why

• Type : wall-mounted heat pump (mini-split) , perfect for urban housing where space and aesthetics matter.

• Brand : Gree , recognized for its efficient Inverter platforms, compatible with R-32 and adapted to the climate of Greater Montreal .

• Capacity : configuration sized for a living area (living room/dining room/open kitchen).

• Objectives : stable comfort, high efficiencies , minimal visual impact, reduced noise and potential eligibility for grant programs (depending on the exact series and low temperature performance).

The AirGreen installation process: precision, cleanliness and durability

Strategic positioning of the condenser

We mount the outdoor unit high up on galvanized wall brackets , just below the soffit. This decision meets three local requirements:

1. Snow clearance : raising the condenser above the snowdrift threshold reduces the risk of blockage of the exchangers in Montreal winters .

2. Flow and ventilation : the position respects the clearances around the fan and the grilles, ensuring optimal heat exchange.

3. Mechanical protection : when positioned high up, the unit is protected from accidental impacts and salt splashes.

We integrate anti-vibration pads on the brackets and check the plumb to avoid any vibration transfer to the brick.

Route of connections: short, clean, protected

The choice of a short route for the refrigeration lines and the communication cable limits pressure losses and optimizes the Inverter efficiency. The connections are covered in a UV-resistant white capping , turning neatly towards the piercing point.

• Estimated visible length : ≈ 2 to 3 meters between the unit exit and the facade entrance, ideal in an urban environment.

• Facing : careful sealing of the brick wall with a sleeve to protect the insulation and prevent air infiltration.

• Condensate drain : gravity drain from the indoor head (pump not required here), with verified slope and discreet outlet to prevent odor returns and freezing.

Drilling and anchoring: respect for the building

On brick facades in Montreal, we use calibrated mechanical anchors and seal each critical point:

• Sealed joints and penetrations for air and water tightness.

• Anti-tear support plates on the brackets when required by the masonry.

• Slope through the wall to the outside to protect the envelope.

Power supply and compliance

Each wall-mounted heat pump requires a dedicated circuit (circuit breaker according to the amperage of the chosen series) and an accessible external disconnect switch . We connect everything in accordance with the Quebec Electrical Code , label the line at the panel and perform an insulation test before energizing.

Refrigeration treatments: cleanliness above all

• Flares taken up and tightening torques respected with the torque wrench.

• High vacuum to the micron meter (≤ 500 microns stabilized) to remove moisture.

• Nitrogen leak test (value and maintenance in accordance with recommendations).

• Release of factory R-32 after validation, and control of temperatures/pressures at thermal load.

Finishes and acoustics

We set the defrost modes , ventilation levels and comfort settings . The Gree unit, installed high up and decoupled from vibrations, maintains a low noise profile for the neighborhood—a common issue in the alleys and courtyards of Rosemont .

Result: four-season comfort and controlled costs

Thanks to inverter modulation, the heat pump adjusts its power to the actual need. Result:

• Efficient low-temperature auxiliary heating (depending on the R-32 series chosen),

• Uniform air conditioning without drafts,

• Optimized consumption with reduced operating costs compared to baseboards alone or a window air conditioner,

• Aesthetics respected: aligned capping , straight brackets , no visible cables.

Key technical points of this achievement

• Support : galvanized wall brackets with anti-vibration pads , center distance validated.

• Height : under-soffit for ventilation and snow clearance .

• Connections : ≈ 2–3 m hooded; curvature radii respected.

• Drilling : single, sleeved , outgoing slope ; elastomer sealant.

• Drain : gravity ; protection against frost and splashing.

• Electrical : dedicated circuit , external disconnector ; panel labeling.

• Commissioning : controlled deep vacuum , pressure test, defrost settings.

Grants and eligibilities (Montreal, Laval, Longueuil, North Shore, South Shore)

Several Gree R-32 models meet the performance requirements for Quebec programs (based on capacity and low-temperature efficiency ). Our team verifies the exact combination (head + condenser) and prepares the files : compliant invoices, installation photos, AHRI numbers where applicable, and proof of commissioning. This installation is designed to maximize your chances of eligibility , without ever compromising durability.

AirGreen Tips for Plex and Condo Owners

• Favor short journeys : better efficiency and less risk of leaks in the long term.

• Raise the condenser : In Montreal , aim for a minimum clearance of 30–45 cm above the snow line, more when the environment is exposed.

• Protect the connections : UV-resistant capping extends the life of the insulation and simplifies maintenance.

• Plan electricity early : A dedicated circuit and a well-placed disconnect switch facilitate inspections and avoid delays.

• Demand a vacuum to the micron : it is the silent guarantee of a healthy refrigeration circuit .

Why choose us?

At AirGreen , we design each HVAC installation for Greater Montreal as a long-term project :

• Practical engineering (clearances, brick facades, alleys).

• Clean execution (suitable anchors, waterproofing and finishes).

• Complete service (sizing, subsidies , maintenance).

• Follow-up : We remain available for HVAC maintenance , filter cleaning, load verification and seasonal updates.

And then?

We offer an annual maintenance plan : gentle washing of the condenser, checking of electrical connections , pressure verification, cleaning of the interior head and resetting of the economy parameters. This approach maintains efficiency over the winters and extends the life of your wall-mounted heat pump .