Four-season comfort carefully integrated into an interior with Montreal character
At AirGreen , we work in many older plexes and condos in Greater Montreal where moldings, decorative lighting, and load-bearing walls require precise execution. This installation in Rosemont–La Petite-Patrie illustrates our approach: a Sharp wall-mounted heat pump installed under a textured cornice, near a wall-mounted light fixture, with a discreet appearance and measurable performance from the moment it is commissioned.
Housing context and client objectives
The owner wanted:
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Stabilize the temperature of a southwest-facing living room, which is prone to overheating in summer and nighttime heat loss in winter.
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Reduce energy bills without increasing ambient noise.
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Preserve the aesthetics of a room dressed with original frames and moldings.
We recommended a Sharp wall-mounted heat pump (typical capacity of 9,000 to 12,000 BTUs for this volume), a versatile solution for mid-season supplemental heating and summer cooling, while remaining energy-efficient and quiet.
Choosing a location: airflow and aesthetics
The indoor unit is placed high on the wall , away from the cornice to avoid any recirculation of hot air to the ceiling. Our placement criteria:
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Upper and lateral clearance respected for free suction and even diffusion towards the center of the room.
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Move away from sources of interference (curtains, bulky frames, hot lamps which distort the temperature reading).
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Height optimized for gravity drainage of condensates, avoiding the addition of a pump and limiting maintenance.
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Blowing axis oriented so as to sweep the living area, without directing the flow directly onto the sofa.
The adjacent wall light required precise centering : we validated the opening of the shutters, access to the casing and the freedom of the thermistor sensor to guarantee faithful regulation.
Routing connections: treating the invisible
The installation is carried out in a back-to-back manner towards an exterior facade. We group together:
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Insulated refrigeration tubes in HVAC class,
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Certified communication/power cable ,
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Continuously sloping condensate pipe .
Inside, a minimalist white capping accompanies the outlet towards the wall, then extends outside to protect the connections from UV rays , shocks and frost. Outside (not visible here), the condensing unit is mounted on wall brackets clear of the ground to promote water flow and limit snow accumulation, a crucial point in Montreal winters .
Technical particularities and precautions on this site
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Moldings and textured ceiling : laser tracing to maintain lines perfectly parallel to the cornices; dowels adapted to the material; clean sealing of the drilling.
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Decorative frames : air shedding control to avoid dead zones behind the paintings; low-speed vibration check to avoid transmitting hums to the wall.
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Noise pollution : setting nighttime silent mode; checking desuperheating in air conditioning mode to prevent expansion whistling.
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Condensates : slope > 1% guaranteed, service siphon and outlet outside the passage area to avoid any splashing on the masonry.
Why the Sharp wall-mounted heat pump is suitable for Rosemont
The Sharp wall series are distinguished by:
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High efficiencies (SEER/HSPF) and precise compressor speed control for stable comfort.
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Quiet operation , ideal for living rooms and bedrooms.
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Efficient heating at low temperatures (down to approx. -20 to -25°C depending on the range), relevant for the North Shore , Laval and the heart of Montreal .
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Advanced filtration and evaporator surface treatment limiting dust and humidity.
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Compatibility with grant programs when the configuration meets Energy Star criteria and minimum heating performance.
Installation steps followed by AirGreen
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Load calculation and validation of BTU capacity for the main room.
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Identification/prototyping : position, drilling template, routing of connections and condensate discharge point.
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Fixing the wall plate with suitable anchors; checking the flatness to avoid flow noises.
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Through drilling at a downward angle; deburring the sheath; application of a vapor barrier .
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Installation of the Sharp indoor unit , testing of the shutters and the oscillation.
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Brazing/Torque-controlled flare fittings ; nitrogen priming , deep vacuum and leak testing .
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Electrical connection on dedicated circuit breaker in accordance with the Code ; circuit labeling.
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Commissioning : supply/return temperature measurements, superheat/subcooling, compressor intensity, vibration control.
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Delivery to the customer : operating instructions, seasonal adjustments, HVAC maintenance schedule.
Result: performance, silence and integration
The room quickly reaches the setpoint, without unpleasant drafts. The noise level remains low, even under load, and the visual integration respects the alignment of the moldings and frames. The uniform diffusion limits temperature strata, a point often criticized in apartments with high ceilings.
Advice on use and maintenance from our technicians
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Filters : clean every 4 to 8 weeks during periods of intensive use.
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Fins : Gentle dusting; do not obstruct the front face with oversized drapes or frames.
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Heating mode : in very cold weather, leave the appliance running continuously to maintain compressor stability.
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Remote control/thermostat : avoid direct sunlight which distorts the reading; activate eco programs at night.
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Annual HVAC maintenance visit: check pressures, residual vacuum, drain, and clean the evaporator/condenser.
What AirGreen brings more
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Certified team accustomed to the constraints of Montreal plexes (load-bearing walls, brick joints, cornices).
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Clean finishes (adjusted capping, watertight seals, perfect level).
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Support for subsidies for Montreal, Laval , Longueuil , North Shore and South Shore when the device and configuration are eligible.
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Responsive after-sales service , with fast parts and diagnostics on the brands we install.
Need a careful HVAC installation in Greater Montreal?
We install wall-mounted heat pumps , wall-mounted air conditioners , and multi-zone systems, with an approach focused on customer service, technical precision, and sustainability. For projects in Montreal, Laval, Longueuil, the North Shore , or the South Shore , AirGreen guides you from sizing to grants, then ensures clear and predictable maintenance.