Installation of a Gree Vireo R32 wall-mounted heat pump in Villeray–Saint-Michel–Parc-Extension

Immediate comfort, precise adjustments and R-32 efficiency in a Montreal plex
In a typical Villeray–Saint-Michel–Parc-Extension apartment, we are installing a Gree Vireo R32 wall-mounted heat pump to provide rapid cooling in the summer and stable supplemental heating in the mid-season. Our goal: a clean, quiet, and easy-to-maintain HVAC system , perfectly suited to the constraints of plexes and condominiums in Greater Montreal .

Client context and objectives

The owner was looking for:

• Responsive comfort for the main living area (living room + open dining room).

• An efficient R-32 solution, compatible with energy efficiency trends.

• A discreet installation that does not alter the interior architecture or the facade.

• Simplified maintenance and very low noise level.

We recommend the Gree Vireo R32 for its balance of performance, silence and control options (fine modes, timer, Wi-Fi depending on configuration). The operating range is suitable for hot summers and cool mid-seasons in Montreal , Laval and Longueuil .

Installation details – controlled back-to-back and careful finishing

• Configuration : Back-to-back installation. The interior head is fixed close to the ceiling to optimize air stratification; direct passage at the rear to the outside.

• Drilling : 65 mm core with slight slope for drainage; waterproof filling with vapor barrier and air barrier compatible mastic.

• Refrigeration lines : short length (≈ 3 to 5 m) limiting pressure losses; brazing under nitrogen , high-density continuous insulation, anti-abrasion collars.

• Condensate drainage : gravity , insulated pipe to prevent condensation on cold walls; discreet outlet with non-return spout.

• Electricity : dedicated power supply, calibrated circuit breaker; external disconnect switch near the condenser.

• Outdoor unit : fixed on galvanized wall brackets with silent blocks ; clearances respected for effective defrosting in winter; anchoring compliant with the support.

Performance checks at commissioning

After deep vacuuming and leak testing, we validate the pressure stability and compressor intensity. In air conditioning mode, the blown air temperature measured at the outlet drops to around 10–12°C , a sign of efficient heat exchange and a well-configured flow rate. The fan is then adjusted to balance silence and range.

Why the Gree Vireo R32 in this project?

• R-32 refrigerant : reduced charge, better EER/SEER at equivalent configuration.

• Quiet : compressor and inverter fan; night mode for sensitive periods.

• Comfort control : fine shutter adjustments, timer, automatic restart after failure.

• Performance : adapted to the requirements of several efficiency programs (eligibility to be validated on a case-by-case basis).

• Simple HVAC maintenance **: accessible filters, easy cleaning of the exchanger.

Aesthetic and acoustic integration

We take care of the exterior capping (UV channel) matching the rear facade. Inside, the head is centered for even diffusion and to avoid dead zones . The silent blocks and the anchor length reduce structural vibrations – essential in plexes with wooden floors.

Key steps of our AirGreen methodology

1. Technical survey : room dimensions, wall structure, location of electrical panel, condensate drainage.

2. BTU sizing : calculation based on volumes, solar gains and use; proposal 9k/12k/18k BTU depending on the thermal load.

3. Installation plan : shortest route, drilling in safe area (excluding uprights/spacers), position of brackets.

4. Preparation : furniture protection, tarpaulins and HEPA vacuum cleaner for a clean construction site.

5. Installation : supports, soldering, line insulation, connections.

6. Commissioning : vacuum < 300 microns, stabilization, top-up if required, functional test.

7. Discount : mode guide (Auto, Dry, Heat, Fan), good HVAC maintenance practices , energy saving instructions.

Concrete results for the client

• Immediate comfort thanks to the cold blown air measured around 10–12°C at the outlet, even on hot days.

• Quiet noise level : the Vireo R32 operates without parasitic hum thanks to mechanical decoupling.

• Aesthetics preserved : compact capping and discreet condensate outlet.

• Controlled operating costs : inverter modulation which adapts power to actual needs.

Good usage practices

• Maintain clearances around the head and do not obstruct the grilles.

• In summer, choose a set point of 23–24°C and Dry mode on very humid days.

• In the off-season, use Heat mode for a quick top-up without restarting the main system.

• Program the timer and Eco mode when away.

• Clean the filters every 4 to 6 weeks during periods of use; plan annual HVAC maintenance (cleaning the exchanger, checking load, intensities, condensates).

Technical points to watch out for in Montreal plexes

• Drillings : respect the air barrier/vapor barrier and ensure a durable seal to prevent infiltration and mold.

• Condensates in humid climates : minimum slope and outlet protected against frost; in the case of a complex route, provide a mini-pump with a steam barrier.

• Noise pollution : choose a rear facade or a side yard, set the night mode; inform the condominium if necessary.

• Winter : Clear the outdoor unit of snow and ice; check defrosting during mild weather.

Alternatives proposed by AirGreen according to needs

• Gree Livo R32 for excellent value for money.

• Gree Sapphire R32 when extreme silence and cold performance are priorities.

• Interior systems (1-way cassette, ducted , console ) when required by the architecture.

• MultiZone R-32 heat pump if multiple rooms need to be air conditioned/heated independently.

Grant and compliance support

We assist our clients in verifying eligibility for available energy efficiency programs (performance criteria, location Montreal , Laval , Longueuil , North Shore , South Shore ) and we provide the necessary technical documents. Electrical standards and mechanical clearances are respected for a safe and durable installation.

Why choose AirGreen for your HVAC installation?

Our teams understand the realities of Montreal buildings : composite walls, restricted access, noise control, membrane management, and coordination with unions. Our construction sites are documented, our tests recorded, and our usage advice is personalized to maximize the longevity and performance of your wall-mounted heat pump .