An interior renovation project where every detail counts: four-season comfort, short runtimes and an invisible finish.
Context: renovate without compromising on comfort or aesthetics
At AirGreen , we are working on a simply renovated apartment in Rosemont–La Petite-Patrie (Montreal) . The owners wanted efficient supplemental heating and precise air conditioning in a passageway open to the kitchen. The ceilings are equipped with LED recessed lights , the walls are new, and a high ventilation grille is already in place nearby. The priority is clear: an efficient, discreet , and durable HVAC system , integrated into the clean style of the space.
We recommend a Gree Livo R32 12,000 BTU wall-mounted heat pump for its fine modulation, seasonal efficiency, and compact design that blends seamlessly into the framing wall. The R-32 range improves performance and reduces environmental impact, while meeting the efficiency requirements sought in Greater Montreal.
What we achieved: a careful layout and an ultra-short route
Inner head positioning
The head is centered on the circulation wall approximately 2.1 m from the floor. This position prevents any direct blowing onto seated occupants, frees up low furniture, and allows the air jet to follow the ceiling before diffusing into the kitchen and hallway. The motorized shutter is set for a gentle forward sweep to even out the temperature.
Invisible rear crossing and optimized line length
We use a rear hole directly behind the machine: the refrigerant lines exit outside by the shortest possible distance . This strategy:
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reduces pressure losses and improves compressor performance ;
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removes the interior capping , guaranteeing a refined aesthetic;
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limits intervention time and simplifies future HVAC maintenance operations.
Condensate drainage by gravity
The layout allows for continuous gravity drainage , without a pump. We maintain a stable minimum slope , with vapor barriers and waterproofing at the crossing points. The advantage is twofold: silence and long-term reliability , essential assets in apartments.
Renovation coordination
The accommodation is being finished (technical openings visible on the kitchen side). We are coordinating:
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dedicated power supply with circuit breaker of the prescribed Gree rating;
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grounding and clearance compliance;
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synchronization with the painter for clean touch-ups around the mounting plate template.
External unity and respect for the building
The outdoor unit is installed in accordance with the rules of the condominium and the municipality, clear of any obstacles and protected against vibration transmission thanks to damped supports. We provide for the management of winter defrost water to avoid ice accumulation near pedestrian traffic.
Why the Gree Livo R32 for a Rosemont apartment?
Performance and real comfort
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Inverter technology : the machine continuously adjusts its power, reduces ON/OFF cycles and stabilizes the temperature .
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R-32 : Better SEER/HSPF at equivalent power, lower refrigerant charges and improved carbon footprint.
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Silence : in partial mode, the interior noise level remains very low, ideal for teleworking and quiet evenings.
Compatibility with urban needs
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Recent envelope but marked internal gains (open kitchen): the 12,000 BTU covers the needs while maintaining a wide low modulation range.
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Filtration : The filter cartridge captures fine dust; the configuration facilitates quick access for monthly cleaning .
Technical focus: the key steps that make the difference
Soldering and sealing
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Brazing under nitrogen , deep vacuum with controlled dehydration of the bonds;
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Nitrogen pressure test and pressure monitoring before opening the valves;
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Sealing of penetrations inside and outside (HVAC compatible mastic and vapor barrier).
Commissioning and settings
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Checking blowing temperatures , pressures , superheating and subcooling ;
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Auto/Heat/Cool mode adjustment according to occupant usage;
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Orientation of the fins to avoid air currents in the passage area.
Electricity and compliance
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Dedicated circuit to the panel, compliant circuit breaker rating;
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Service switch when required by the outdoor location;
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Polarity and continuity measurements before starting.
Concrete result for the occupants
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Immediate comfort from the first use, without a “cold snap” in the corridor;
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Aesthetics preserved thanks to the absence of a visible chute inside;
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Minimal noise and low consumption in mid-season, the longest period of use in Montreal .
What this installation teaches for apartments in Montreal, Laval and Longueuil
Best practices to remember
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Shortest possible path between indoor head and outdoor unit to preserve performance.
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Priority gravity evacuation for reliability and silence.
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Rear drilling when the configuration allows: aesthetics and easy maintenance.
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Installation height adapted to promote air mixing without direct blowing.
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Renovation coordination : reserve a construction site window for installation and powering up at the right time.
Pitfalls avoided
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No unnecessary condensate pump (source of noise/maintenance).
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No oversized lines or excessive loops that penalize the compressor.
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No decorative trunking visible inside, in order to protect the architectural line.
Grants and Eligibility
High-efficiency R-32 wall-mounted heat pumps may be eligible for assistance programs in Quebec. We verify each file for Montreal , Laval , Longueuil , as well as for the North Shore and the South Shore , according to the capacity, performance and installation protocol required by the organizations.
HVAC Maintenance: Maintaining Performance and Air Quality
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Clean the filters every 4 to 6 weeks during use.
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Annual inspection : electrical connections, flow, fixing, refrigerant parameters.
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Exchanger hygiene : gentle treatment if necessary to prevent biofilm and odors.
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Exterior clearances maintained (snow, leaves) to maintain air flow.
Simplified Load Study: Why 12,000 BTUs Here
The apartment benefits from a well-insulated envelope but an open plan that generates internal gains (kitchen, lighting, occupants). A well-modulated 12 kBTU covers most of the needs, limits cycles and optimizes the COP . On heat peaks, the configured air flow and sweeping avoid stratification.
Why AirGreen for your project in Rosemont, Villeray, Verdun or Brossard?
Our team sizes, installs, and commissions your heat pump using rigorous procedures (deep vacuum, pressure testing, and settings). We pay careful attention to the finish and guide customers through the documentation needed for assistance programs. Whether it's for a wall-mounted air conditioner in a new condo or an upgrade in a plex, we operate throughout Greater Montreal— Montreal, Laval, Longueuil, the North Shore, and the South Shore —with one constant requirement: lasting comfort .
Project Quick Facts
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Type : single-zone wall-mounted heat pump
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Brand : Gree – Livo R32
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Capacity : 12,000 BTU (open kitchen-hallway room)
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Route : back crossing , very short connections (< 3–4 m)
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Condensates : gravity , without pump
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Special features : new wall, recessed ceiling, adjacent ventilation grille , renovation/electricity coordination
Need a similar installation?
We plan, size, and install your HVAC system with a level of finish suited to careful renovations. Contact us for an accurate quote and advice on grants available in your area.