Four-season comfort in a Montreal duplex: our precise method for flawless wall installation
At AirGreen , we transform Montreal living spaces into stable and quiet spaces. In this Rosemont–La Petite-Patrie duplex, we installed a Gree wall-mounted heat pump ( Clivia R32 range), positioned between two patio doors to efficiently serve the open living-dining area and reduce the temperature differences perceived during the very humid days of July as well as the dry cold of January.
Client background and objectives
The owner wishes to:
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improve air quality and summer comfort without oversizing;
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reduce mid-season supplemental heating costs;
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preserve the interior aesthetics of a highly visible central wall;
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limit noise and vibrations on the stage side.
We recommend a compact HVAC installation , with a short connection to the backyard, to optimize seasonal performance and acoustic discretion.
Equipment selection: Gree, Clivia R32 range
The Clivia R32 family from Gree is part of the recent ranges with R-32 fluid, renowned for:
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better seasonal efficiency (high SEER/HSFP) due to favorable pressure/enthalpy;
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a reduced refrigerant charge and lower GWP than R-410A;
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fine modulation of the inverter compressor which stabilizes the temperature and reduces short cycles.
In this type of open space (living room, dining room, circulation to the kitchen), the 12,000 BTU configuration is generally the most appropriate when aiming for a compromise between comfort and efficiency without excessive noise. The infrared control and the Dehumidification and Turbo modes allow you to respond to humidity peaks and rapid recovery after opening the patio doors.
Interior layout details
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Location : High on the central wall, equidistant from both bay windows. This position limits direct air currents and promotes an airflow parallel to the ceiling, ideal for gentle stratification and coverage of the open area.
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Height : approx. 2.2 m from the ground, guaranteeing optimal sweeping and easy access for HVAC maintenance (washable filter).
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Fixing : anchor plate with screws and dowels suitable for the support; check the level and counter-arrow for condensate drainage.
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Drilling : single, Ø ~65 mm, with slight slope towards the outside for gravity evacuation.
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Finishes : Clean cable routing and peripheral sealing for airtightness; interior finishes remain minimal and discreet on a light wall.
Refrigeration path and condensate management
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Estimated connection length : < 5 m, which limits pressure losses and improves the actual COP in daily use.
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Evacuation : gravity with insulated hose, avoiding the lifting pump (reducing noise and maintenance).
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Insulation : high-density foam sleeve + UV-shielding tape on the outside to protect the insulation.
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External capping : matching rigid chute, guaranteeing a clean and watertight route.
Outdoor unit: discretion and performance on the courtyard side
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Location : backyard/balcony, on anti-vibration supports . This choice keeps vibrations away from the interior structure and simplifies service .
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Clearances : respect the clearances around the exchanger to maintain the air flow and prevent fouling during pollen season.
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Winter management : maintaining a snow-free level and alignment protected from falling ice from the eaves, to preserve heat exchange during thaws.
Commissioning: what we systematically check
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Nitrogen leak test and deep vacuum (< 500 microns) with stabilization, to eliminate residual moisture.
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Adjust the vanes and blowing mode to avoid air recirculation near patio doors.
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Electrical control : intensity at different levels, wiring and protections.
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Acoustic validation : measurements at 1 m and 3 m; possible adjustments to the support.
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User briefing : best summer/winter practices, filter maintenance, energy saving instructions.
Results observed after installation
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Rapid reduction of ambient humidity in summer in the open area, with a more uniform feeling of freshness thanks to the laminar jet on the ceiling.
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Effective additional heating from autumn and spring, limiting the use of electric baseboards.
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Noise contained both inside and outside, in line with the client's expectations and the typical neighborhood of Rosemont backyards.
Tips for maximizing savings
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Summer setting : 23–24°C with occasional Dry mode on heavy days.
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Winter instructions : 21°C, flap slightly upwards to promote air mixing .
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Maintenance : filter washing every 4 to 6 weeks during pollen season; annual AirGreen inspection (exchangers, connections, condensates, electrical tightening).
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Openings : limit the simultaneous opening of both patio doors; reactivate Turbo 10–15 min to resume comfort.
Grants and Compliance
New generation R-32 wall-mounted heat pumps with good cold weather performance may be eligible for certain programs in Quebec. Eligibility depends on the specific model and its performance data sheets. During the submission, we verify compliance, technical documents and potential financial optimization for Montreal, Laval , Longueuil , North Shore and South Shore .
Classic pitfalls avoided on this site
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No need for a condensate pump : here, gravity drainage eliminates a point of failure and noise.
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Oversized connection : by remaining short and direct , we avoid load losses and overconsumption.
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Direct blowing onto the seating area : the central position and height limit discomfort.
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Vibrations : suitable supports + checking of tightening torques during commissioning.
Why AirGreen for your HVAC installation in Montreal
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Local and tailor-made approach for brick plexes and duplexes in Greater Montreal .
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Mastery of short routes and backyard/balcony constraints.
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Turnkey service: sizing, installation, HVAC maintenance , verification of eligibility for aid, and after-sales support.
Key technical sheet (summary)
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Type : single-zone wall-mounted heat pump , R-32 fluid
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Range : Gree Clivia R32
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Interior layout : central wall between two patio doors, ~2.2 m high
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Route : single drilling, connections < 5 m, gravity evacuation
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Exterior : courtyard side on anti-vibration supports , clearances respected
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Maintenance : washable filters, annual inspection recommended
And after?
We support owners and condominiums in Montreal , Laval , Longueuil , the North Shore and the South Shore with similar projects: capacity selection, site design, clean finishes, and maintenance that ensures long-term seasonal performance. Our team plans the intervention taking into account the reality of Montreal buildings: balcony access, neighborhood, restricted hours and heatwave periods.