Four-season comfort perfectly suited to condos with concrete ceilings
In this project in a condo in Southwest Montreal , our team installed a new generation R-32 GREE wall-mounted heat pump , designed to provide quiet heating and cooling in an urban environment with an exposed concrete ceiling. The goal: to stabilize the temperature year-round, limit electricity consumption and preserve a clean aesthetic — without compromising accessibility for HVAC maintenance .
Our HVAC installation method in a condo: rigor, discretion, performance
Location analysis and selection
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Context : high-rise housing, light interior walls, concrete slab ceiling, typical of lofts in the Southwest .
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Positioning : The indoor head is installed high on the wall , at a regular distance from the ceiling to promote air intake and avoid immediate recirculation. The unit is centered to effectively cover the main living space and serve the adjacent bedroom.
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Aesthetics & maintenance : compliant front clearance for easy access to filters and the blower flap; discreet digital display on the front for reading the setpoint.
Specifications of installed equipment
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Brand : GREE — the benchmark in the market for high-efficiency R-32 wall-mounted heat pumps .
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Range : R-32 wall-mounted (high efficiency, low temperature heating).
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Typical capacity : 9,000 to 18,000 BTU depending on the volume to be treated and the load calculation carried out by our technicians.
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Highlights : Inverter compressor, fine modulation, reduced noise level, night/eco modes, multi-layer filtration, intelligent defrosting for Montreal winters.
Refrigeration path and power supply
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Short and optimized route between the indoor unit and the outdoor unit (balcony/terrace), which reduces pressure losses and improves seasonal efficiency.
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Insulated refrigeration connections , calibrated according to the actual length; brazing under nitrogen and nitrogen leak test before deep vacuum drawing.
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Protected communication wiring ; dedicated power supply from the electrical panel according to the load (appropriate circuit breaker, approved cable).
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Condensates : gravity drainage prioritized; if the condo configuration requires it, integration of a low-noise condensate pump with simplified maintenance.
Neat interior finish
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Flush white chutes , large radius curves for a clean aesthetic and optimized interior airflow.
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Mechanical fixing using anchors suitable for concrete when required, with anti-vibration insulation to prevent sound transmission to the slab.
Outdoor unit and condominium regulations
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Installation : on anti-vibration supports and service tray for clearing the defrosting tray.
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Runoff management in heating mode to avoid disturbing the neighbors below.
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Compliance with the regulations of the co-ownership syndicate (size, noise level, location, snow guard or casing depending on exposure).
AirGreen commissioning and quality controls
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Vacuum draw until reaching a stable level below 500 microns; resistance test .
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Checking the intensities , the blowing temperature and the superheating/subcooling according to the conditions of the day.
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Calibration of the remote control and explanations to the customer on the heating, air conditioning and dehumidification modes.
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Submission of a commissioning report and maintenance instructions (filter cleaning, seasonal checks).
Why a GREE R-32 for an urban condo?
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High energy efficiency (high SEER2/HSPF2) to reduce bills during peak summer and winter periods.
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R-32 : new generation refrigerant with reduced PAG compared to R-410A, better heat exchange and lower charge.
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Reliable heating in cold weather : GREE R-32 ranges maintain useful capacity at low temperatures, suitable for Greater Montreal winters.
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Silence : design of the fan and casing limits noise, decisive in co-ownership.
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Durability : Proven inverter compressor, protected electronic board, integrated diagnostics.
Result obtained at the customer's premises
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Uniform comfort in the living area and bedroom thanks to the motorized shutter and good diffusion.
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Measurable drop in humidity levels in summer, synonymous with greater perceived comfort even at moderate settings.
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Controlled consumption thanks to modulation and short refrigeration path.
AirGreen Tips to Maximize Performance
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Filters : rinse or vacuum every 4 to 8 weeks depending on ambient dust.
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Remote control : choose a constant mode (Heating/Cooling) rather than Auto during the off-season to avoid unwanted switching.
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Instructions : Aim for 22–23°C in summer and 20–21°C in winter; the inverter works best over long, stable periods.
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Clearances : Do not obstruct the indoor unit with shelves or heavy curtains.
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Annual maintenance : inspection of the outdoor unit, defrost pan and condensate drain; deep cleaning of the exchanger if necessary.
Pitfalls to avoid in a condo
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Poorly designed drainage : An incorrect condensate discharge point causes overflows. We check the flow or install a pump if gravity is not possible.
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Refrigeration overload : Adding refrigerant without calculating the length can degrade efficiency and reduce compressor life.
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Insufficient external support : vibrations are transmitted through the structure; we use anti-vibration pads and, if necessary, a distribution plate .
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Union non-compliance : An unauthorized location may require dismantling. We handle approval upfront.
Sizing: How we determine the correct capacity (BTU)
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Load calculation taking into account: surface area, free height (concrete slab), orientation, windows, air infiltration, occupation and internal equipment.
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Zoning : In open plan, a single, well-positioned head often covers the living area; for multiple rooms, we offer GREE R-32 MultiZone solutions .
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Acoustic comfort : selection of a suitable fan speed at night (<neighborhood condo>).
Grants and funding
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High-efficiency R-32 wall-mounted heat pumps may be eligible for existing programs (depending on capacity and performance ratings). Our team validates the criteria and prepares applications for clients in Montreal, Laval, Longueuil, the North Shore and the South Shore .
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Financing solutions available to spread the investment while immediately benefiting from energy savings.
Why AirGreen for your HVAC system ?
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Greater Montreal specialists : hundreds of residential installations in condos, plexes and houses.
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Measurable quality : standardized soldering, testing and commissioning procedures; complete documentation.
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After-sales service : proactive monitoring, maintenance reminders, availability during peak periods.
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Unbiased advice : We install multiple brands (GREE, Fujitsu, Midea, Sharp, etc.) and recommend the best solution for your space, not the other way around.
HVAC Maintenance: The Annual Game Plan
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Spring : visual inspection, condensate test, cleaning of the crankcase and filters, cold test.
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Autumn : check heating intensities, inspect the exterior defrosting tray, update instructions.
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In case of odor : thorough cleaning of the indoor exchanger and fan to maintain air quality .
In short : this GREE R-32 wall-mounted heat pump , installed with a short cooling path, secure drainage and a dedicated power supply, provides quiet and energy-efficient four-season comfort perfectly suited to condos in Southwest Montreal . With AirGreen, you benefit from a meticulous, compliant HVAC installation and complete support for subsidies and maintenance .