A typical Plateau-Mont-Royal construction site: a lush courtyard, century-old brick façade, and side-alley access. Here, our team is replacing a seasonal backup system with a new-generation Sharp R-32 wall-mounted heat pump , providing four-season comfort without compromising the building's aesthetics.
A choice designed for the built environment of the Plateau
Plateau homes often feature load-bearing brick walls, close cornices, and tree-lined courtyards. We opted for a compact, quiet, and economical HVAC system capable of low-temperature heating and efficient cooling of the open living areas typical of apartment and plex renovations.
Why a Sharp wall-mounted heat pump (R-32)
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Inverter modulation : gentle temperature rise, stability and reduced consumption.
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R-32 refrigerant : lower climate impact compared to R-410A, better volumetric capacity.
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Acoustic comfort : fan and compressor at low speed, ideal for the quiet streets of the Plateau.
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Filtration & mixing : consistent air quality thanks to sweeping and easy-access filters.
Outdoor installation: clean, robust, reversible
We install the condenser on steel wall brackets , at a height high enough to protect the coil from winter buildup and facilitate maintenance. Under the unit, blue silent blocks absorb micro-vibrations: it's discreet for the neighborhood and comfortable inside.
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Facade : red brick, anchors sealed in the joint, dowels adapted to the substrate.
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Clearances : respect distances from the soffit and openings to avoid air recirculation.
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Disconnect box : installed within easy reach, waterproof, for safety and maintenance.
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Plant management : the Virginia creeper is cut back around the blowing template to preserve heat exchange.
Visible details that make the difference
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Triangular brackets : rigidity and load distribution, perfect for refurbished old walls.
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Right-hand side refrigeration path : protected and insulated connections, curvature radius respected.
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Wiring : bundled and secured to prevent flapping in the wind; neat descent to disconnection.
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Defrost drainage : drip planned outside traffic areas to avoid ice in winter.
Optimized indoor/outdoor route
The wall head is positioned on a side wall, facing directly towards the living areas. The drilling is carried out behind the unit , with a slight slope towards the outside to allow gravity drainage of the condensate in summer.
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Total line length : short (approx. 3–4 m), which minimizes losses and improves seasonal yield.
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Leak -tightness : Deep vacuum, leak testing and torque tightening—our AirGreen standards.
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Dedicated power supply : circuit breaker size and cable section in accordance with the manufacturer and the Code.
Sizing and Use: The Right Capacity, Not the Biggest
On the Plateau, the volumes are often open-plan but compact. We size around 9,000 to 12,000 BTU depending on the envelope and sunlight, with a margin for afternoon heat. The objective: maintain the setpoint (e.g. 22°C) in auto speed , without oversizing, for a high COP and minimal noise.
Concrete result for the occupants
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Daily silence (end of the hum of old portable devices).
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Directed airflow over living areas, with no drafts on the sofa or dining table.
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Windows freed (no more sheath to obstruct opening).
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Controlled bills thanks to inverter modulation and R-32 refrigerant .
Brand and range: Sharp, efficiency and discreet design
The Sharp signature is evident in the sleek condenser grille and Eco Inverter screen printing. We select a recent R-32 range perfectly suited to Montreal winters. Depending on the electrical configuration and thermal load, we offer the most relevant capacity, while retaining the advantages of:
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sustained low temperatures in heating,
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optimized defrosting for short cycles,
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precise control (remote control and programming).
(When the exact model number is not required by the customer in the public communication, we relate the machine to the installed Sharp R-32 family and provide the technical data sheets with the contract.)
AirGreen operating mode: visible and invisible quality
Before the work
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Technical visit: identification of drilling paths , verification of the brick structure, locations of joists and electrical lines.
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Discussion with the client on the orientation of the blowing , the installation height, the clearances around the curtains and light fixtures.
During the works
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Protection of the passage areas and clean drilling at the correct angle for the drain.
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Tooled flares, brazing without overheating the insulation, testing under nitrogen and vacuum < 500 microns .
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Initial settings: auto speed, horizontal/vertical scanning , comfort settings.
After the work
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Explanations provided : cleaning filters, use in heating mode in very cold weather, noise reduction management (night mode).
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Acoustic check on the facade and in the courtyard: no unwanted transmission towards the interior or to the neighbors.
HVAC maintenance: simple and profitable over time
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Filters : rinse/vacuuming every 4 to 8 weeks during intensive periods.
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Condenser : brushing with snow melt, without direct high pressure.
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Annual AirGreen inspection : exchangers, electrical tightening, condensate, parameter updates, leak check.
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Vegetation : light pruning each spring to keep the fins clear.
Our HVAC maintenance agreements ensure continued performance and protect the manufacturer's warranty .
Grants and Compliance
R-32 wall-mounted heat pumps with good seasonal performance and cold weather capability are generally eligible for energy efficiency programs in Quebec . We support our clients in the Montreal metropolitan area, Laval, Longueuil, North Shore and South Shore to verify eligibility, prepare proof of performance and submit applications on time.
Best practices + pitfalls to avoid (AirGreen feedback)
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Do not stick the outdoor unit under the cornice: there must be clearance for air supply and discharge.
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Avoid unnecessary excess lengths : they penalize efficiency and heating response.
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Anticipate wintering : route the defrosting flow away from pedestrian walkways to avoid ice.
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Vegetation : Vines are beautiful, but they must never obstruct the condenser grille.
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Electricity : Dedicated circuit and accessible disconnection ; no extension cords, no power strips.
What the customer remembers
From the moment it is put into service, the house gains in silence , thermal stability and freedom of use (clear windows, intact courtyard). The Plateau-Mont-Royal requires respect for the building and the tranquility of the alleys: the installation on brackets with silent blocks and a clean path meets these requirements exactly.
AirGreen, your HVAC partner in Greater Montreal
We install, maintain and repair wall-mounted heat pumps , wall-mounted air conditioners and MultiZone systems throughout Montreal , Laval , Longueuil , as well as on the North Shore and South Shore . Our commitment: accurate sizing , impeccable HVAC installation and responsive after-sales service .