A discreet balcony installation that respects the co-ownership and maximizes comfort
At AirGreen , we transform cramped spaces into clean, reliable, and easy-to-maintain HVAC systems. This project in Rosemont–La Petite-Patrie (Montreal) illustrates our approach: a Sharp wall-mounted heat pump ( ZHU1 series, new-generation refrigerant) installed on a brick balcony, with a neatly covered passageway and raised support to protect traffic and the neighborhood. The result: efficient heating in mid-season and stable air conditioning in summer, with an aesthetic integration that satisfies the condominium.
Client background and objectives
The client lives in a brick condo with a balcony. Priorities:
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Keep a clear path on the terrace.
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Reduce perceived noise and vibrations inside.
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Obtain an HVAC installation that complies with the condominium rules and required clearances.
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Prepare the system for our Montreal winters, while maintaining a clean condensate drain.
Why the Sharp ZHU1 series
Sharp's ZHU1 series is one of the new high-efficiency ranges using a lower GWP refrigerant. It stands out for:
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An inverter compressor capable of providing low temperature heating, ideal for Greater Montreal .
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Interior modules compatible with several room formats (open living room, bedroom, office).
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Low exterior noise levels are welcome in co-ownerships.
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Reliable electronics facilitating preventative maintenance by our HVAC maintenance team.
Note: We validated the necessary power of the main zone during sizing; the series exists in multiple capacities, which allows for precise adjustment without oversizing.
Technical details of the installation
Location and support
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Condenser installed on a raised aluminum base , anti-vibration feet and stainless steel fixings. The elevation prevents water/frost accumulation and facilitates cleaning.
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Rear and side clearances respected, as well as front access for maintenance (battery cleaning and checks).
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Optimized orientation to limit the recirculation of hot air in summer and facilitate winter defrosting.
Refrigeration and electrical routing
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Vertical then horizontal covered course under soffit, brown capping coordinated with the brick for a clean visual integration.
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Estimated connection length 5–7 m , with continuous insulation, collars and vapor barriers at penetrations.
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Compliant nearby outdoor disconnect box , UV protected wiring, and properly sealed conduit to the wall.
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Unique controlled-angle drilling to prevent water ingress; polymer sealant and metal weatherstripping.
Condensate management
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Gravity drain with continuous slope inside the hood; discreet exit to the balcony, away from passage areas.
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Future option planned for the addition of anti-freeze heating cable if the union requires it for periods of prolonged extreme cold.
Acoustic and anti-vibration measures
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Neoprene pads under the feet + chassis level adjustment to prevent solid transmission.
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Multi-speed fan humming test: acceptable at the edge of the balcony and not noticeable with the patio door closed.
Commissioning and quality controls
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Deep vacuum ≤ 500 microns, stabilization and “standing vacuum test”.
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Opening valves, checking overhang pressures/temperatures, taking intensity measurements and balancing the indoor air flow.
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Leak check by superheat/subcooling reading and visual inspection of flanges/nuts.
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Remote control settings: auto, dehumidification and energy programming modes.
Site constraints and AirGreen solutions
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Limited space on balcony: narrow raised support chosen to free up circulation and seasonal storage.
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Brick facade : we used suitable anchors and protected the holes with weatherstripping and mastic for superior durability.
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Co-ownership : documentation provided (sound technical sheet, clearances, capping visuals) and compliance with working hours — an aspect that our team regularly manages in Greater Montreal , Laval and Longueuil .
Expected performance and comfort
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Fast and even air conditioning thanks to the inverter mode which avoids on/off cycles and stabilizes the temperature.
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Efficient low-temperature supplementary heating , useful in the off-season to relieve the main system.
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Improved air quality thanks to washable filters in the interior head; recommended for semi-annual maintenance (spring/fall).
For North Shore and South Shore readers, the ZHU1 series is particularly suitable for brick condos/plexes, where aesthetics and silence are paramount, while maintaining a margin of performance in the cold.
Aesthetics and durability of integration
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UV/frost resistant brown capping - stainless steel screws and clean cuts; well-closed corners under soffit to prevent water and insect nests.
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Cables and connections not exposed to UV rays or abrasions from the guardrail.
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Installation height calculated so that projected snow or meltwater does not reach electrical components.
HVAC Maintenance: What We Do for You
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Cleaning of the outdoor unit (coil, tank, fan) and gentle stripping without damaging the fins.
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Check the torque of the connections, re-insulate if necessary, test the compressor intensity.
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Hygiene of the interior head (filters, exchanger, blower) to limit allergens and maintain performance.
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Annual HVAC maintenance program available for Montreal , Laval , Longueuil , North Shore , South Shore .
Grants and Compliance
New-generation, high-efficiency wall-mounted heat pumps (low GWP refrigerant, cold performance) are generally eligible for certain provincial programs in effect. We verify eligibility on a case-by-case basis (primary residence, seasonal efficiency, exact model installed) and prepare the necessary documentation (serial numbers, photos, detailed invoice).
Deadlines and organization of the worksite
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Pre-visit and validation of co-ownership.
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Installation typically completed in one day for a simple setup like this (one head).
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Commissioning and demonstration of functions to the owner; delivery of the best practice guide (winter/summer).
Common mistakes… that we avoid
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Drilling too low without drain slope → drops onto the neighbors' balcony.
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Support placed directly on the slab without anti-vibration devices → buzzing transmitted inside.
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Light capping on red brick → annoying visual contrast and rapid yellowing.
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Insufficient clearances on the discharge side → loss of efficiency during heat waves.
The result for the customer
A discreet , silent and efficient installation, ready for the summer heat as well as for the off-season. All while respecting the co-ownership and with a clean finish, like our AirGreen projects throughout Greater Montreal .
Need a similar project?
We install wall-mounted heat pumps and wall-mounted air conditioners throughout Montreal , Laval , Longueuil , as well as the North Shore and South Shore — with careful attention to aesthetics, compliance and cold performance.
Express FAQ
Is the ZHU1 series suitable for small condominiums?
Yes. It offers good performance with a contained exterior noise level, essential in dense environments.
Do you need a condensate pump?
Not here: gravity drainage is possible because we have achieved a continuous slope. When the configuration does not allow it, we install a silent pump with a safety tank.
What happens in extreme cold?
The system maintains useful capacity at low temperatures; it is still advisable to keep a main heating source for extreme peaks.
Is the interview complicated?
No. Seasonal cleaning and an annual inspection are sufficient to maintain performance and longevity.
What this installation says about our method
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Precise sizing, respecting the typical brick buildings of Rosemont–La Petite-Patrie .
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Wiring and connections neatly covered , raised and anti-vibration support , accessible disconnection .
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Rigorous commissioning and clear explanations to the occupant.
At AirGreen, we combine technical expertise and careful finishing for installations that last and are pleasing — today in Rosemont, tomorrow perhaps at your home in Montreal , Laval , Longueuil , on the North Shore or South Shore .