Four-season comfort in a Verdun plex: a precise, clean and durable HVAC upgrade
Verdun offers these typically Montreal facades overlooking tree-lined balconies and peaceful streets. In one of these plexes near the river, our team installed a Sharp wall-mounted heat pump above a door leading to the balcony. The goal: to provide stable comfort in summer and winter , while controlling energy consumption in an urban home where every centimeter counts.
Project context: a bright… and demanding space
The client occupies a floor of a plex with a large glass opening onto the balcony. In summer, the sun quickly heats the living room; in winter, the challenge is to maintain a consistent temperature without multiplying the convectors. We offer a Sharp wall-mounted heat pump for its reliability , its sound sobriety , and its consistent performance at low temperatures, essential for the Montreal climate.
Issues identified:
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Low clearance above the door : required a high and compact installation, with precise clearance for the insufflation flap.
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Direct access to the balcony : advantage for the passage of refrigerant connections and the gravity evacuation of condensates .
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Comfort in an open area : need to optimize the direction of the air flow to cover the living room and dining area.
Equipment Choice: Sharp's Logic for Urban Environments
The Sharp wall-mounted range (new generation R-32 refrigerant) meets the expectations of urban housing:
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High energy efficiency thanks to the inverter, favorable to electricity savings .
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Quiet operation : very low interior noise level, ideal for an open area where people work and relax.
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Air quality : multi-layer filtration and fine airflow control to limit unpleasant air currents.
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Cold resilience : maintaining capacity in extreme cold depending on the configuration chosen, a decisive advantage for Montreal, Laval, Longueuil, North Shore and South Shore .
When relevant (capacity and performance), these wall-mounted heat pumps may be eligible for grant programs available in Quebec. Our team systematically verifies the criteria (seasonal performance, low-temperature performance, certification).
Implementation and route: a clean installation, designed to last
We position the interior head above the door leading to the balcony, at a height of approximately 2.2–2.3 m . This carefully centered placement ensures:
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uniform diffusion towards the living area;
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avoiding short recycles on the lintel;
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easy access for maintenance (filter cleaning, annual inspection).
Technical course:
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Single, slightly sloping hole to promote gravity drainage of the condensate drain.
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Refrigerant connections (insulated copper) routed through discreet white capping to the balcony — total length estimated between 2 and 3 meters , limiting pressure losses and optimizing performance.
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Outdoor unit placed on anti-vibration supports and polymer wedges to cut off the transmission of solid-borne noise to the balcony structure.
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Checking the wall's tightness (fireproof foam + mastic finish) to prevent air and humidity infiltration.
AirGreen quality approach: rigor, safety, cleanliness
Each HVAC installation carried out by our teams follows a strict sequence:
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Electrical checks and dedicated circuit breaker rating; routing of communication/power cable according to current code.
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Flares calibrated with torque meter, deep vacuum control (< 500 microns) to eliminate humidity and ensure compressor longevity.
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Nitrogen pressurization and leak test, then release of refrigerant.
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Settings : orientation of the fins, ventilation speed, set temperature and verification of delta T in cold/heat mode.
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Customer training : best practices, filter maintenance, recommended HVAC maintenance schedule.
Result: a clean , reliable assembly, ready for several seasons without any problems.
Performance and comfort: what the customer feels
From the first hours of use, the benefits are tangible:
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Rapid cooling of south/west facing volumes thanks to directed air supply under the ceiling.
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Even heating in mid-season and winter: fine modulation which avoids jolts and reduces the bill compared to electric baseboards.
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Quiet operation : automatic ventilation maintains a low noise level , compatible with teleworking and quiet evenings.
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Air quality : easily accessible filters, clear maintenance recommendations.
Installation details (technical summary)
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Type : wall-mounted heat pump (mini-split).
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Brand : Sharp .
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Location : Verdun (Montreal) .
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Interior installation : above a door opening onto the balcony; clearance respected for opening the shutter.
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Drain : gravity towards the outside (controlled slope).
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Refrigerant path : approx. 2–3 m in white capping, single hole, direct outlet to balcony.
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Outdoor unit : anti-vibration mounts, free clearance for suction/discharge.
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Commissioning : vacuum, leak test, calibrations, hot/cold test and pressure reading.
Tips for use and maintenance to maximize gains
To get the most out of your Sharp wall-mounted heat pump :
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Maintain a stable setpoint (e.g. 23–24°C in summer, 21–22°C in winter) rather than frequent variations.
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Clean the filters every 4 to 6 weeks during periods of intensive use; a clean filter = better performance and silence .
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Keep space in front of the interior head; avoid thick curtains or bookcases that are too close.
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In winter, clear snow around the condenser and check the defrost water drainage.
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Schedule annual HVAC maintenance : electrical inspection, pressure check, evaporator and condenser cleaning, drain check.
Grants and administrative support
Depending on the configuration chosen (efficiency, capacity, low-temperature performance), the wall-mounted heat pump may be eligible for certain assistance offered in the region. At AirGreen, we:
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let us analyze the admissibility of the system;
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prepare the necessary documents ;
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We guide clients from Montreal, Laval, Longueuil, North Shore and South Shore through the process to speed up obtaining the possible amounts.
Why AirGreen for your installation in Verdun and throughout Greater Montreal?
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Local expertise : understanding of the realities of plexes, balcony/condenser cohabitation, access and neighborhood.
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Careful execution : discreet finishes (cappings, seals, drain management) and respect for the building.
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Safety and compliance : standardized procedures, documented tests, commissioning report.
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After-sales service : maintenance contracts, rapid response in the event of an alert, parts and advice available.
This project in Verdun reflects our approach: an HVAC system that integrates into the space, protects the building envelope and delivers measurable comfort from day one.
Conclusion: A simple upgrade that changes everything
In an urban home where every detail counts, the Sharp wall-mounted heat pump offers a rare balance between comfort, energy efficiency , and discretion. Its installation above the balcony door, gravity-based condensate management , and short connection routes make it a clean and efficient installation. At AirGreen, we replicate this rigor throughout Greater Montreal to ensure lasting comfort, summer and winter.