Precise, discreet and efficient comfort for a Montreal apartment, delivered turnkey by our AirGreen teams.
Project context and client expectations
In a Rosemont–La Petite-Patrie home, our client wanted to improve four-season comfort without cluttering the space. The priorities: a quiet, energy-efficient wall-mounted heat pump compatible with current Quebec subsidies, and a clean HVAC installation with minimal impact on the interior finish.
Why the Gree Livo R32 for this accommodation
Here we opt for a Gree Livo R32 , a single-zone wall-mounted head known for its seasonal efficiency and its R-32 refrigerant with a lower GWP than R-410A. The range covers from 9,000 to 24,000 BTU , which allows us to adjust the capacity to the volume of the rooms. For this apartment, the load calculation (surface area, insulation, orientation, windows) directs us towards a configuration of 12,000 BTU , ideal for the living room and adjoining open areas.
Key advantages of the Livo R32
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Stable performance in Montreal cold with capacity maintained at low temperatures.
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Very low noise level inside, perfect for open living spaces.
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Smart defrosting and economy mode, promoting measurable energy savings .
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R-32 refrigerant: less charge, better volumetric efficiency, simplified maintenance.
Installation process: precision and cleanliness
Our approach is to prepare each step to limit dust and repainting.
Interior layout
The wall-mounted head is installed high under the ceiling , near a supporting corner. This position optimizes air stratification : the vertical sweep distributes heat in winter and cool air in summer. The plate is perfectly level and anchored to the studs. We check for uniform clearance around the unit to facilitate maintenance.
Drilling and passage of connections
We make a single drilling, slightly inclined outwards (2–3%), for gravity evacuation of condensates. The refrigerant lines (liquid and gas), the communication cable and the drain pipe follow a short route on the right side of the unit: fewer bends, minimal pressure losses, and neat aesthetics . The total length of the connections, optimized (≈ 2.5–3.5 m in this case), limits the quantity of additional refrigerant and improves the real EER.
Condensate management
The drain slopes continuously outward. This option eliminates the need for a condensate pump (a potential source of noise and maintenance), while making the system more reliable. We secure the passage with a vapor barrier sleeve to maintain the seal.
Exterior finish
Outside, the connections are protected by UV-resistant capping that resists Quebec winters. The condenser (not visible here) is installed on galvalume brackets or on a slab depending on the facade configuration and building regulations; we integrate snow guards or retention trays for terraces as needed. Clearance in accordance with the manufacturer's recommendations is maintained for airflow and maintenance.
Power supply and compliance
Power is supplied from the main panel via a dedicated circuit and circuit breaker compliant with the machine's rating. Our qualified electricians ensure proper conductor sizing , grounding, and compliance with the Code. We affix our identification labels to simplify future HVAC maintenance work.
Commissioning: AirGreen method
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Deep vacuum (< 500 microns) with vacuum resistance control.
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Opening of valves and weighing of the load when required by the length of the lines.
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Checking for superheating/subcooling , testing hot/cold modes , controlling the sweep , calibrating the leak detector .
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Validation of sound levels and air flow .
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Customer training: cleaning the pre-filter , programming the remote control , good seasonal practices.
Results observed after installation
From the first start-up, the homogeneous diffusion in the open area is evident; the set point is reached quickly, then the inverter modulates at low speed, which maintains stable comfort with contained consumption. The high position limits air currents in the living area and improves dehumidification in summer.
Grants and Eligibility
Wall-mounted heat pumps using new-generation refrigerants and offering high efficiency are generally eligible for assistance programs in Quebec. We assist our clients in Montreal, Laval, Longueuil, the North Shore, and the South Shore in preparing the necessary documents: proof of installation, model numbers, detailed invoices, and technical photos that meet the requirements.
Good usage practices
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Maintain a single setpoint over 24 hours to allow the inverter to modulate effectively.
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Clean filters every 4–8 weeks depending on usage.
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Clear the outdoor unit of snow and leaves to maintain airflow.
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Schedule annual HVAC maintenance : electrical inspection, pressure/temperature measurement, exchanger/wheel cleaning, condensate drainage check.
Pitfalls to avoid in similar accommodations
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Install too low : the airflow decreases and the device works harder.
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Winding line routes: load losses, noise and reduced efficiency.
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Condensate pump unnecessary when gravity is sufficient: more failure points.
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Condenser without minimum clearance : increased noise and more frequent defrost cycles.
What value we bring
At AirGreen , we understand the constraints of Montreal plexes and condos: shared walls, short lines, drilling management, building regulations, and harsh winters. Our signature: a precise, documented and durable HVAC installation , with after-sales follow-up and a local team that can be reached quickly in Montreal , on the North Shore , the South Shore , Laval and Longueuil .