Installation of a Sharp (R-32) wall-mounted heat pump in Île-des-Sœurs
On Nuns' Island , AirGreen installs a Sharp wall-mounted heat pump (R-32) on a balcony: anti-vibration aluminum support, insulated connections, external disconnect switch and controlled drain. A discreet, compliant and efficient HVAC installation for condominiums.
In summer, the outdoor unit rejects the house's heat outside.
Generic illustration of this type of installation, not a survey of this job site. Tap a number.
Mounted level on a wall plate, high enough for the air to reach the whole room, with enough space around it to slide the filters out easily.
The refrigerant lines, the communication cable and the drain go through the wall in a single opening, sealed against water, cold air and insects.
Two insulated copper pipes connect the two units. Outside, a line cover can protect them from sun, knocks and weather.
A shut-off switch near the outdoor unit isolates it safely for service. It must stay accessible at all times.
The compressor and the fan. In heating mode it captures heat from the outdoor air, even in winter, and moves it inside.
On the ground or on the wall, it keeps the unit above accumulated snow. The unit stays clear and defrost water can drain away.
The fan needs to blow freely. Storage, a fence or a wall too close, and efficiency drops while noise goes up.
A balcony installation tailored for co-ownerships: discreet, efficient and A2L compliant
Context: 4-season comfort in co-ownership
On Nuns' Island , the majority of customers live in condominiums with clear constraints: discreet equipment, low noise, compliance with condo management regulations and safe circulation on balconies. Our mission: to install a new generationSharp R-32 wall-mounted heat pump to provide efficient heating and cooling for an apartment facing the river, while optimizing longevity, safety and aesthetics.
Why Sharp R-32 Technology
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Energy efficiency : recent Sharp R-32 ranges display excellent seasonal efficiencies ( SEER/HSPF ) and operating stability in mid-season and in outdoor cold.
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A2L refrigerant (R-32) : low GWP compared to R-410A, reduced charge and good thermal capacities. Safety requirements are integrated (A2L signage, good installation and ventilation practices).
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Acoustic comfort : Inverter compressors and fine fan management limit noise levels in the evening — a key issue in co-ownership.
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Service and parts : access to maintenance parts and technical documentation allowing rigorous HVAC monitoring by our teams.
Balcony installation: our decisive technical choices
Support and anti-vibration
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Mechanically fixed, raised aluminum frame with elastomer pads under the support points. The raised frame clears the airflow and protects the device from puddles or occasional snow accumulation.
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Direction of flow to preserve tranquility: blowing directed towards the outside of the balcony, away from the bay windows and the handrail, in order to avoid recirculation and nuisances for the neighborhood.
Refrigeration and electricity connections
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Dehydrated copper piping with high-density continuous insulation, carefully tied and UV protected.
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Short, straight route between the outdoor unit and the wall crossing: less pressure loss and better heating efficiency .
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Outdoor disconnect switch installed within easy reach, wiring protected in metallic/rigid conduit according to Code and grounding verified.
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Connections made with nitrogen brazing , pressure testing and deep vacuum drawing until reaching the recommended micron levels for a reliable and long-lasting R-32 charge.
Condensate management
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Controlled drainage via the tray and a flexible drain designed to be connected to a specific drainage point. No free discharge onto the balcony or dripping onto the facades. In heating mode, water formation on the exterior is limited by the height and orientation of the support.
Waterproofing and finishing
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Wall crossing treated with flashing and mastic compatible with the envelope, in order to ensure continuity of sealing and insulation .
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Clean and compact finishes: discreet technical sheath, stainless steel screws, and clearances respected to facilitate maintenance .
AirGreen HVAC installation process (condo)
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Validation of co-ownership : reading of the regulations (dimensions, noise, position, access), confirmation of work schedules.
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Technical survey : measurements, routes, choice of disconnector , anchor points on slab/balcony and verification of the structure .
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Preparation : protection of passage areas, electrical identification and testing of dedicated circuit breakers.
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Installation of the support : appropriate mechanical anchors with insulating spacers to break the vibration bridges.
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Drilling and lines : flaring/brazing of connections, nitrogen infiltration and extended leak testing.
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Vacuum and charge : deep vacuum, stabilization, valve opening. Checking for superheating and subcooling .
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Commissioning : air conditioning and then heating tests, checking of intensities and noise level .
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Delivery : instructions for use, HVAC maintenance log, reminders on A2L ventilation and clearance clearances.
Results: immediate comfort and lasting peace of mind
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Thermal stability in summer and winter, even on windy river days.
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Silence and discretion on the balcony thanks to the anti-vibration support and inverter adjustment.
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Aesthetics respected: clean passages, compact sheath and device aligned with the guardrails.
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Optimized maintenance access : compliant clearances and accessible disconnect switch for rapid interventions.
Maintenance recommended for maximum longevity
Seasonal maintenance (resident)
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Clean the inner head filters every 4–8 weeks during use.
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Clearances : Maintain 30 to 60 cm free around the unit; do not store objects under the blower.
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Monitoring : check that there is no stagnant water near the support and that the fixings are intact.
Annual maintenance (AirGreen)
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Pressure inspection , electrical checks (tightening, insulation), cleaning of exchangers , defrosting and condensate drainage testing.
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A2L verification : integrity of the connections and ventilation of the interior room; reminder of safety instructions.
A2L (R-32) security: integrated best practices
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Signage present on the device, indicating the A2L nature (slight flammability).
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Natural ventilation provided on the balcony, watertight crossing and connections carried out in accordance with current standards.
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Suitable tools (vacuum pump, suitable R-32 detector, pressure gauges) and personnel trained in handling A2L refrigerants.
Grants and Eligibility
Depending on the capacity (BTU) and performance of the Sharp range chosen, the wall-mounted heat pump may be eligible for assistance programs in Quebec. We analyze your file ( AHRI number, detailed invoice, proof of installation) and assist with the process for addresses in Montreal , Laval , Longueuil , North Shore and South Shore . Our team systematically checks the alignment between cold performance and program requirements.
Common pitfalls in balcony installation (and our solutions)
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Device placed directly on the ground : promotes corrosion and transmits vibrations. → Raised aluminum support + pads.
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Air recirculation due to poor positioning in front of the guardrail. → Orientation studied and compliance with clearances .
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Non-watertight wall crossing generating infiltration and thermal bridges. → Compatible flashings and mastics, clean finishes.
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Uncontrolled drain causing water on slabs and facades. → Directed and controlled evacuation .
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Unnecessary loops and lengths of refrigeration connections which degrade efficiency. → Short and straight route, regular anchors.
Why AirGreen for your condo on Nuns' Island (and throughout Greater Montreal)
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Co-ownership expertise : we understand the realities of unions (noise, aesthetics, time slots, access).
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Mastery of recent brands in R-32 / R-454B (Sharp, Gree, Fujitsu, Midea, etc.) and sizing to the exact needs (calculation of loads, line lengths , circuit breakers).
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Traceability : submission of documents ( AHRI , site photos, commissioning sheet).
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Local service : teams covering Montreal , Laval , Longueuil , North Shore and South Shore , with annual HVAC maintenance at a preferential rate for our customers.
Quick FAQ (useful in co-ownership)
Is the appliance noisy for the neighbors?
Inverter mode and anti-vibration pads significantly reduce noise and solid-borne transmissions.
What happens in extreme cold?
Sharp R-32 ranges maintain useful low temperature capabilities; commissioning includes defrost adjustment and amperage verification.
What A2L obligations do I need to know?
Follow the posted instructions, avoid any unauthorized modifications and maintain clearances . AirGreen ensures installation in accordance with standards and natural ventilation of the balcony.
Want the same result in your condo on Île-des-Sœurs or elsewhere in Greater Montreal?
Our advisors guide you from the choice of BTU to subsidies , with a careful, durable HVAC installation that complies with co-ownership rules.
How it goes, from the first call to the end
The main steps of this kind of job at AirGreen. Every house has its quirks: the estimate brings them out.
We look at the room, the outside wall, the line route and where the outdoor unit will go. That is where the capacity gets chosen.
Model, capacity and price, in writing. We also check whether the model qualifies for assistance programs.
Floors and furniture protected, wall plate position marked level, wall opening located.
A single opening, with the slope the drain needs to flow outside.
Set on a stand raised above the snow, with the clearances the manufacturer requires.
Connected, insulated and protected. The opening is then sealed against water, cold air and insects.
A dedicated circuit and an accessible disconnect near the outdoor unit.
Leak test, vacuum, then start-up and a check of heating and cooling.
Remote, modes, filters: we show you the essentials before we leave.
- The on-site estimateWe look at the room, the outside wall, the line route and where the outdoor unit will go. That is where the capacity gets chosen.
- The quoteModel, capacity and price, in writing. We also check whether the model qualifies for assistance programs.
- Getting readyFloors and furniture protected, wall plate position marked level, wall opening located.
- The wall openingA single opening, with the slope the drain needs to flow outside.
- The outdoor unitSet on a stand raised above the snow, with the clearances the manufacturer requires.
- Lines, cable and drainConnected, insulated and protected. The opening is then sealed against water, cold air and insects.
- The electrical workA dedicated circuit and an accessible disconnect near the outdoor unit.
- Tests and start-upLeak test, vacuum, then start-up and a check of heating and cooling.
- The walkthroughRemote, modes, filters: we show you the essentials before we leave.
And at your place?
Two quick checks with real numbers: what heat costs, and what your current heaters add up to in BTU/h.
Conversion: 1 W = 3.412 BTU/h. An indication, not a load calculation: baseboards and furnaces are often stronger than the real need, and they can stay as backup. AirGreen confirms the capacity on site.
What to do, season by season
Three habits per season for this unit. They take a few minutes and prevent many calls.
- Clean the indoor unit's filters.
- Clear leaves and debris left on the outdoor unit by winter.
- Test cooling before the first hot days.
- Clean the filters more often when the unit runs a lot.
- Keep plants away from the outdoor unit.
- Check that no water drips from the indoor unit.
- Rake the leaves around the outdoor unit.
- Test heating before the first cold days.
- Book periodic maintenance before winter.
- Keep snow away from the stand and the front of the unit.
- Let the unit defrost: it is normal.
- Never hit the ice on the fins; call us if the unit stays iced up.
Which type of equipment for your project?
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Four mistakes we do not make
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What people ask us about this kind of work
Does a wall-mounted heat pump heat in winter?
Wall-mounted or multi-zone: how do I choose?
Where does the outdoor unit go?
Are there grants?
Do I need a permit?
How cold can it heat?
How much can I save?
How is the LogisVert assistance calculated?
Is it noisy?
The outdoor unit is covered in ice: is that normal?
Does AirGreen hold the required licences?
Is the estimate free?
No question matches. Write to us: we answer.
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Text and photo: a real AirGreen Climatisation & Chauffage job. The diagrams are generic illustrations of the type of installation, not a survey of this job site. Sources of the added figures: airgreen.ca product pages (NEEP / AHRI performance), Hydro-Québec (Heat pumps page, LogisVert, read on 13 October 2026), Régie de l’énergie (rate D as of 1 April 2026).