An urban project where comfort, silence and efficiency are aligned
In a condo in Montreal's Le Sud-Ouest district, we installed a Sharp wall-mounted heat pump (ZU/ZHU series, R-32 refrigerant) to ensure four-season comfort while reducing energy consumption. The setting is typical of Montreal: a private balcony, a light-colored façade, colorful woodwork, and limited outdoor space—an environment that requires a precise, meticulous HVAC installation that is perfectly integrated into the architecture.
The customer's need: gentle warmth in winter, coolness in summer, no compromise on aesthetics
The owner wanted to replace an inefficient portable air conditioner with a reversible solution capable of heating efficiently in cold weather and cooling quietly during hot spells. In addition to these criteria, two key requirements were met: visual cleanliness inside and mechanical stability of the condenser on the balcony, without transmitting vibrations to the structure.
The advantages of the Sharp solution (ZU/ZHU range)
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High-efficiency inverter compressor for fine modulation and substantial electricity savings.
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R-32 refrigerant with a lower GWP than R-410A, as part of a responsible approach.
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Extreme cold performance adapted to Montreal winters, maintaining excellent comfort without overconsumption.
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Filtration and air quality functions (Sharp proprietary technology) appreciated in urban environments.
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Sound level contained both inside and outside — a major point in co-ownership.
Expected result: a uniform temperature , imperceptible starts and stops , and minimal noise on a daily basis.
Interior layout: optimal diffusion and short lines
The wall unit was positioned above a bay window to promote air circulation. This central placement limits thermal shadows and improves stratification in winter.
We have chosen to keep the lines as short as possible (approximately 2.5 to 3 m), covered in white PVC flush with the wall in order to preserve the aesthetics and facilitate any future interventions (maintenance, addition of a lifting pump, etc.). Condensate is drained by gravity , a reliable and silent choice when made possible by the layout of the premises.
Points of attention addressed:
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Installation height calibrated to avoid air returns and optimize the blowing angle.
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Expansion gaps are respected in the capping to avoid any cracking over the seasons.
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Single clean drilling , with peripheral sealing and controlled slope.
Outdoor installation: a stable condenser, splash-proof and… worry-free
The Sharp Eco Inverter condenser is installed on the balcony, resting on a sturdy aluminum platform . This choice has several decisive advantages in an urban environment:
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Regulatory clearances around the air intake and blower, guaranteeing the declared performance of the device.
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Useful height to stay protected from puddles, accumulated snow and dust.
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Anti-vibration pads placed under the feet to break the transmission of vibrations to the balcony slab.
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Stainless steel anchors and screws treated to resist freezing and thawing and urban salt spray.
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Runoff management : orientation of the blowing so as not to inconvenience neighbors and avoid the return of heated air.
This raised configuration protects the outdoor unit, extends its lifespan and reduces structure-borne noise —a highly appreciated feature in condominiums.
AirGreen execution quality: method, measurement, control
Each construction site follows a standardized procedure :
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Deep vacuum draw until a stable micron level is reached, then resistance test to eliminate any humidity and any risk of micro-leakage.
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Tightness control of flared fittings (tightening torques using a dynamometer).
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Complete functional test in cold/heat modes with ΔT measurements, verification of currents and power factor .
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Fine-tuning of sweep and airflow to align comfort and acoustics.
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Maintenance brief given to the customer (filter cleaning, maintenance frequency, warning signs).
Salient installation details (observable on site)
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Support on aluminum platform , anti-vibration feet, level and bracing checked.
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Short refrigerant lines , high density insulated, white interior casing for a discreet finish.
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Gravity evacuation of condensate — no pump = zero additional noise and simplified maintenance.
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Direct wall-to-wall path without floor crossing, reducing pressure losses and intervention time.
Grants and Eligibility
The Sharp wall-mounted heat pump (R-32) , when it reaches the required performance and low operating temperatures, may be eligible for financial assistance in Quebec. We support our customers to document the file (performance certificates, detailed invoice, proof of installation) and maximize the amounts when applicable in Montreal, Laval, South Shore and North Shore .
HVAC maintenance: the guarantee of lasting performance
To maintain original performance:
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Clean filters every 4 to 8 weeks depending on usage.
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Annual inspection by our technicians (tightening, pressure, drainage, probes).
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Exterior clearances to be kept free (leaves, snow, objects).
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Acoustic monitoring : any change in noise is a useful warning signal to report to us.
Proper maintenance reduces consumption , extends lifespan and preserves the warranty .
Construction timeline and coordination in co-ownership
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Validation of the quote and collection of the co-ownership rules (timetables, protection of common areas).
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Taking measurements and identifying holes.
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One-day installation , including testing and delivery of the user guide.
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Complete cleaning of work areas, return of premises to impeccable condition.
Our team coordinates with the union as needed and provides the requested RBQ/CCQ certificates for perfect traceability.
Result: controlled comfort, reduced bills, peaceful co-ownership
The Sharp wall unit + cushioned platform installation + short lines combination delivers a winning trio: efficiency, silence, durability . In a dense neighborhood like Le Sud-Ouest , it's these details that make the difference on a daily basis - for the owner as well as for their neighbors.
Why AirGreen?
We operate throughout Greater Montreal — Montreal , Laval , the South Shore , and the North Shore —with teams specializing in residential installations . Our promise: accurate diagnosis , aesthetic integration , compliance with standards , after-sales follow-up , and grant support .
Whether it's Sharp, Gree, Fujitsu, Midea or another brand in our offering, we recommend the right capacity (BTU) , location and configuration for your home and budget.
Practical tips for an apartment with a balcony
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Use a platform rather than brackets if structural vibrations are a concern.
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Check the permissible load of the guardrail before any suspended installation.
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Anticipate de- icing : maintain a free air passage around the condenser in winter.
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Provide a dedicated outlet and an adequate circuit breaker according to the appliance's rating plate.
Conclusion
This installation in the Southwest illustrates our way of working: detailed site analysis , rigorous execution and impeccable finishing . The Sharp wall-mounted heat pump (ZU/ZHU range, R-32) provides immediate comfort and real savings , while integrating discreetly into the life of the condominium. At AirGreen, we transform every urban constraint into an opportunity to do better - sustainably.