Brick facade, metal balconies, quiet interior courtyard: we are working on a typical triplex in Rosemont–La Petite-Patrie to equip a mid-level dwelling with a recent wall-mounted heat pump using R-32 refrigerant . The goal: reliable heating in Montreal winters, controlled cooling in summer, and clean integration into exposed masonry.
An exterior installation designed for the building
On the rear wall of the building, the outdoor unit is mounted on wall brackets at a safe height that frees up floor space and protects it from snow drifts. We use anti-vibration pads under the anchor points to cut off the transmission in the brick and preserve the peace and quiet of the neighbors.
A vertical technical hood in brown-red runs along the facade: it groups together the covered refrigeration and electrical connections , which guarantees a visually clean line, accessible for maintenance, and compliant with clearance regulations.
Customer context and site constraints
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Accommodation of approximately 85 m² , open-plan rooms overlooking the courtyard.
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Brick facade with stacked balconies , common circulation to be respected.
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Need for reduced noise levels in the courtyard, especially in the evening.
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Side aisle access: limited window of intervention and coordination with occupants of other floors.
We are therefore planning a short, coordinated intervention with the union and the co-owners, to limit the nuisance and secure traffic during the installation of the brackets and the lifting of the device.
Why the Gree Livo R32 for this triplex
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Continuous modulation inverter technology : stable comfort without over-revving, year-round savings.
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R-32 : better mass efficiency and reduced climate impact compared to older fluids.
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Compact format : ideal for wall brackets between two balconies.
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Extreme cold operating range specific to recent murals : capacity maintained down to significantly negative temperatures, suitable for Montreal , Laval and the first ring ( North Shore , South Shore ).
Sizing : based on the load calculation (orientation, insulation, infiltration, glazed surfaces), the target capacity is around 12,000 BTU/h for this accommodation. We always validate the size to avoid oversizing (noise, short cycles) as well as undersizing (lack of heat in very cold weather).
Key steps in our HVAC installation
1) Preparation and location scouting
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Marking out the squares with verification of the chemical anchors and the load-bearing capacity of the brick.
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Definition of a single drilling (≈ 65 mm) through the wall, slightly outwards for the slope of the drain.
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Installation of protections on the ground and on neighboring balconies.
2) Mechanical installation
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Galvanized steel brackets, laser leveled .
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Clearances respected around the fan and the battery (rear, sides, front), for free air flow away from the guardrails.
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Anti-vibration on each contact point, tightened to the torque.
3) Refrigeration connections & power supply
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Insulated annealed copper (3/8–1/4 or 1/2–1/4 depending on capacity), short effective length between outdoor unit and indoor living room head (≈ 3 to 5 m ), optimized for performance.
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Passage through the vertical hood ; controlled curvature radius to preserve the load and avoid any mechanical stress.
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Communication wiring and dedicated power supply with rated circuit breaker, panel labeling.
4) Condensate management and sealing
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Gravity drain from the interior head with controlled slope , accessible service point.
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Waterproofing and weatherstripping around the crossings; UV capping finish to match the facade.
5) Commissioning and checks
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Deep vacuum and extended vacuum resistance (leak test).
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Load compensation as needed according to actual length.
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Measurements in operation: currents , superheating , subcooling , supply/discharge temperatures .
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Sound levels checked in the courtyard and in the main room.
Salient details visible on the work
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Wall brackets on the second level to free up ground space and prevent snow from being thrown up.
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Vertical hood that can be combined with other lines of the building, guaranteeing a continuous line from the ground floor to the upper floors.
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Brick facade : limited openings, clean finishes around exits.
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Respect for balconies : no discharge of hot/cold air directly into an occupied area.
Results achieved for the client
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Comfortable heating in mid-season and winter, long and silent cycles.
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Even cooling in summer, controlled humidity.
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Expected reduction in energy bills compared to on/off appliances or portable systems.
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Controlled aesthetics and simplified access to maintenance points.
HVAC usage and maintenance tips
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Keep 50–60 cm clear in front of the outdoor unit; clear leaves and snow.
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Clean or rinse the inner head filters every 4 to 6 weeks during heavy use.
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Schedule annual maintenance : electrical inspection, exchanger cleaning, pressure and temperature monitoring, drain check.
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In heating mode in very cold weather, let the appliance manage the defrost cycles ; avoid frequent stops/restarts.
Grants and Compliance
Recent high-efficiency R-32 wall-mounted heat pumps, installed by a licensed contractor and in accordance with current program requirements , are potentially eligible for financial assistance. We assist our customers in Montreal , Laval , Longueuil , North Shore and South Shore with documentation (serial numbers, photos, detailed invoice) and verification of criteria related to the exact model and its low-temperature performance.
Summary technical sheet
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Type : single-zone wall-mounted heat pump .
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Brand / Range : Gree – Livo R32 (recent range with R-32).
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Indicative capacity : ≈ 12,000 BTU/h (validated by load calculation).
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Exterior installation : wall brackets + anti-vibration , clearances compliant.
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Route : 3 to 5 m covered in a vertical column , a main drilling.
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Power supply : dedicated circuit identified on the panel.
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Objectives : 4-season comfort, silence , performance and integration into brick facade.
Our AirGreen approach in Greater Montreal
Each Montreal building has its own particularities: exterior staircases , old masonry , narrow balconies or common courtyards . We adapt the methodology (supports, heights, routes, hooding, condensate management) to deliver a durable and easy-to-maintain installation , whether you are in Rosemont–La Petite-Patrie , Villeray , Le Sud-Ouest , Laval , or on the South Shore and the North Shore .
Good practices for owners (apartment buildings)
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Group connections into a common vertical hood when possible.
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Standardize heights and models over the course of modernizations for a harmonized facade.
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Plan a shared annual maintenance schedule to reduce costs and avoid seasonal breakdowns.
Conclusion
This installation of a Gree Livo R32 on wall brackets in a triplex in Rosemont–La Petite-Patrie demonstrates careful integration on brick with vertical cladding and short run . The result: 4-season comfort , low noise in the courtyard, and a long-lasting installation that meets the expectations of the co-owners.