Installation of a Sharp wall-mounted heat pump (Eco Inverter, R-32 range) in Le Sud-Ouest (Montreal)

Two condensers on the terrace: a precise and sustainable solution from AirGreen

At AirGreen , we design and build HVAC systems specifically for Montreal and its micro-urban constraints. This project, carried out in the Southwest borough (Montreal) , uses two Sharp wall-mounted heat pumps (Eco Inverter, R-32 range) installed on a concrete terrace/balcony, each dedicated to a separate interior area. The objective: to provide independent comfort room by room , significant redundancy in case of unforeseen circumstances, and optimal energy efficiency throughout the year.

Client context: zoning, silence and aesthetics

The accommodation, modern condo type, included:

• a very glazed main living area, exposed to the sun;

• a closed suite requiring fine temperature control;

• a terrace where outdoor equipment could be grouped together, with the requirement of silence and discreet integration .

We recommended two independent wall-mounted systems rather than a multi-zone: this simplifies the management of partial loads, reduces the length of refrigeration lines , and allows each zone to operate at its setpoint without compromise. As a bonus, if one unit is under maintenance, the other continues to provide comfort .

Why the Sharp Eco Inverter (R-32) range

The recent Sharp wall-mounted series, with R-32 refrigerant , combine:

• Very good seasonal efficiencies (SEER/SCOP): tangible savings in use;

• Flexible inverter compressor , ideal for maintaining a stable setpoint;

• Low noise levels indoors and outdoors, perfect for a condo;

• Filtration quality (purification/ionization technology depending on the model) for healthier air.

Without imposing an exact reference, we remain in the ZU/ZHU/TU/THU family from Sharp (R-32) , recognized for its reliability in residential environments in Greater Montreal.

Layout design: two condensers on high supports

On the terrace, we installed two Sharp condensers on aluminum supports with controlled elevation, with:

• Anti-vibration feet and isolation plates (blue shims) to reduce the transmission of structure-borne noise;

• Short paths to wall openings, limiting pressure losses and improving aesthetics;

• Clearances respected (fan face and sides) to guarantee heat exchange and facilitate maintenance;

• Electrical grouping in an external box with accessible service switch .

This raised mounting secures the devices against the accumulation of water and snow and prevents the impacts of runoff in winter defrosting mode. The assembly remains perfectly stable in the face of vibrations and load variations.

Drillings, lines and casing: clean and durable

• Careful drilling by wall condoit with waterproof sleeve ;

• Insulated refrigeration lines (typically 1/4" – 3/8" depending on capacity), 14/4 wiring and grounding in accordance with the Quebec Electrical Code;

• Rigid white exterior cover to protect UV/weather lines and maintain a sober visual signature ;

• Gravity-driven condensate management on the interior side; if an area has an insufficient difference in level, we integrate a condensate pump with safety shut-off.

Electricity and compliance

Our teams validate or carry out:

• dedicated 208/230 V circuits with circuit breakers sized according to the nameplate;

• external protection (switch/lock) and grounding ;

• CSA compliance, Quebec Electrical Code and Sharp manufacturer's guidelines (tightening torque, cable sections, clearances).

Commissioning: AirGreen protocols

1. Brazing under nitrogen and leak test ;

2. Deep vacuum (≤ 500 microns) with verified vacuum resistance;

3. Opening of valves and stabilization;

4. Reading of suction/blowing temperatures and intensity control;

5. Acoustic testing and validation of modes (cooling, heating, dehumidification);

6. Optimization of the shutter/flow on the interior head side to avoid direct air currents.

Result: compliant blowing temperature differentials , demonstrating efficient heat exchange, and electrical stability under load.

Extreme cold and terraces: what we expect

Montreal has variable and windy winters. Our design takes into account:

• Defrost management : clearance under units for water drainage and frost prevention;

• Mechanical protection against gusts (rigorous fixings and wedging);

• Simplified winter maintenance : access to the covers and the ventilated area without complex disassembly.

HVAC Maintenance: Keeping Performance at Its Peak

To preserve yields and warranty:

• Internal filters : clean every 4–8 weeks depending on usage;

• Gentle washing of the internal exchanger, inspection of the drain and the tank;

• External side: clean fins , clearances freed, visual check of silent blocks and covers;

• Annual functional checks (intensities, characteristic temperatures, connections).

We offer AirGreen maintenance plans tailored to condos in Montreal, Laval, Longueuil, North Shore, South Shore .

Pitfalls to avoid (our feedback from the field)

• Undersize one of the zones: it will be difficult to reach its setpoint during a heatwave;

• Bringing the condensers closer together without taking into account the clearances: risk of recirculation of hot air and reduction in efficiency;

• Ignore structure-borne noise : uninsulated supports transmit vibrations to the slab and surrounding areas;

• Excessive line lengths : pressure losses, increased consumption, more delicate maintenance.

Grants and Eligibility

High-efficiency R-32 wall-mounted heat pumps are generally eligible for assistance programs when recognized performance thresholds are met. We support our customers in:

• check eligibility (models, yields, nominal temperatures);

• compile the file (detailed invoice, photos, technical sheets);

• submit to active programs in Montreal, Laval, Longueuil, North Shore and South Shore .

Benefits delivered to the customer

• Independent comfort : each zone manages its own instructions and schedule;

• Perceptible silence thanks to anti-vibration mounts and the Sharp Inverter;

• Aesthetics : clean hood, tidy grouping, discreet wiring;

• Reliability and redundancy : if one device is stopped, the other maintains minimal comfort;

• Energy management : optimization of partial loads and intelligent shutdowns.

AirGreen Usage Tips

• In summer: setpoint 23–24°C , Auto fan, flap slightly upwards to circulate the air;

• In winter: do not obstruct the area under the condensers for defrosting ;

• Program Eco modes during off-peak hours when available;

• Leave interior doors open to share comfort if desired.

Deadlines, guarantees and local service

• Quick technical visit , load simulation and implementation plan;

• Installation usually takes one day using a standard wall system;

• Manufacturer's warranty (parts/compressor) and AirGreen warranty on labor as per contract;

• After-sales service provided by our continuously trained local teams.

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In summary
This installation in Southwest Montreal illustrates the relevance of two Sharp wall-mounted heat pumps (Eco Inverter, R-32) on a terrace: finely zoned comfort , energy savings , silence , and careful installation respecting clearances and winter maintenance. AirGreen provides design , HVAC installation and monitoring for sustainable performance in Montreal, Laval, Longueuil, on the North Shore and the South Shore .

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Areas served
Montreal (Southwest, Plateau-Mont-Royal, Rosemont, Saint-Laurent, etc.), Laval (Chomedey, Sainte-Dorothée, Vimont, etc.), Longueuil , North Shore (Terrebonne, Boisbriand, Repentigny, Deux-Montagnes, etc.) and South Shore (Brossard, Boucherville, La Prairie, Saint-Lambert, etc.). Contact us to confirm availability and delivery times.