Installation of a Gree R32 wall-mounted heat pump in Chomedey
In Chomedey, AirGreen installs a Gree R32 wall-mounted heat pump on a brick facade: galvanized brackets, discreet trunking, leak testing, and professional commissioning. HVAC service Montreal, Laval, Longueuil, North Shore, South Shore.
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The article, chapter by chapter
A clean and durable upgrade on a Laval brick facade
At AirGreen , we modernize the comfort of a home in Chomedey with a Gree R32 wall-mounted heat pump . The goal is clear: to provide precise air conditioning in summer, efficient heating support in winter, and an HVAC system that blends discreetly into the light brick architecture typical of Laval 's residential neighborhoods.
What we put in place for an impeccable result
Our intervention is based around a coherent set of technical elements which ensure performance, longevity and aesthetics.
Selected device and sizing logic
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Type : single-zone inverter wall-mounted heat pump .
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Brand / generation : Gree – R32 (A2L) range , renowned for its high efficiency and reliability.
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Typical capacities : 9,000 to 18,000 BTU for standard living spaces; we size according to the envelope (insulation, glazing), solar orientation and actual use of the room.
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Refrigerant : R-32 (A2L) , with lower global warming potential than older generations, contributing to a more responsible approach.
Architectural integration and support
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Support : galvanized wall brackets with high lever arm, fixed in the masonry by means of dimensioned mechanical anchors; internal counterplate when the configuration of the wall requires it.
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Anti-vibration : elastomer pads under the condenser frame to prevent the transmission of micro-vibrations to the brick and joists of the adjoining terrace.
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Installation height : raised to clear snow on the ground, secure maintenance and maintain optimal clearances around the facade fan.
Refrigeration and finishing
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Short rear exit with outward sloping penetration to protect masonry from water.
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Covering : vertical beige trunking matching the brick and exterior lighting; clip-on corners and covers for a clean finish and easy maintenance access.
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Nitrogen brazing of the copper connections, leak testing with dry nitrogen, then high vacuum controlled with a digital vacuum gauge to guarantee a minimal residual humidity level .
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Insulation : High density anti-UV sleeves on refrigerant lines, glued joints to prevent condensation and losses.
Condensates and electricity
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Drainage : Gravity drainage prioritized—continuous slope, anti-drip loop and discreet outlet; compact pump only if required by internal geometry.
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Power : Dedicated line from panel, breaker rated at unit current rating, external disconnect switch when required by code and route; UV cable in trunking for maximum protection.
Blowing quality and defrost management
The front-mounted condenser blows freely forward: we scrupulously respect the lateral and frontal clearances to avoid any air recirculation , a frequent cause of reduced efficiency and defrost cycles too close together in heating mode. The inverter unit modulates the speed of the compressor and the fan to stabilize the interior temperature, reduce jolts and lower the noise level.
What the owner earns on a daily basis
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4-season comfort : rapid cooling, effective dehumidification mode during heat waves and efficient heat supply when temperatures drop.
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Energy efficiency : inverter technology and R-32 improve the seasonal energy ratio while reducing the environmental footprint.
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Controlled silence : anti-vibration support and careful installation prevent resonances against the brick and woodwork.
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Easy HVAC maintenance : accessible chute, clearances provided for washing the condenser and periodic cleaning of the indoor head filters.
Key steps of our AirGreen method
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Audit and load calculation : survey of surfaces, thermal bridges, solar gains and usage profiles.
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Installation : sizing of the holes, checking of the carriers, choice of the useful height for the condenser and the passage of the chute.
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Brazing / testing : nitrogen , test pressure, high vacuum , stabilization, then opening of the fluid in accordance with the manufacturer's rules.
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Commissioning : air flow parameters, flap angle, condensate test, measurement of supply/return intensity and temperature.
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Delivery : instructions for use (set temperature, programming, maintenance), technical sheet and installation register useful for guarantees and subsidies .
Special features of a brick facade in Chomedey
Light brick houses with patio doors require special attention:
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Clean drilling and sealing : masonry-compatible elastomeric sealant, interior vapor barrier to prevent any moisture migration.
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Water management : do not drain condensate near the patio door; we create an outlet away from traffic and freezing zones.
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Nighttime noise : adjust silent modes and check the attachments of nearby railings or light fixtures to eliminate resonances.
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Snow and ice : installation height calculated to remain clear; if the home is very exposed, a snow guard or deflector may be added.
Recommended maintenance: maintaining performance
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Annual : washing the condenser (fins), checking pressures/probes, testing the condensate pump if present, tightening electrical connections, inspecting insulation and chute covers.
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Seasonal : dusting of internal filters, visual inspection of clearances and water path.
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Good reflex : keep the setpoint stable and avoid extreme back and forth between cold/heat modes.
Grants and Eligibility
High-performance R-32 generation wall-mounted heat pumps are generally eligible for assistance programs in Quebec. Our team guides owners in putting together the file (proof of purchase, certificate of compliant installation, manufacturer's performance statements) to maximize the amounts when the criteria are met. We support our clients in Montreal , Laval , Longueuil , North Shore and South Shore .
Common pitfalls avoided by our team
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Oversizing leading to short cycles and poorly controlled humidity.
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Air recirculation between facade and obstacles (walls, fences, patio furniture).
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Poor management of condensates leaving traces on the brick or freezing in winter.
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Drillings without slope promoting infiltration.
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Poorly closed chutes that age prematurely in the sun and frost.
Why AirGreen for your next project in Laval
Our value lies in precise diagnosis , careful implementation and follow-up . We combine aesthetics , performance and regulatory compliance for installations that last over time. Whether for a plex, a condominium or a single-family home, we adapt the wall-mounted heat pump to your reality: volumes to be treated, facade constraints, noise, maintenance access and budget.
Planning an installation in Laval, Montreal, Longueuil, on the North Shore, or the South Shore? Let's talk about your living space, your savings goals, and your building's requirements: we'll design a custom HVAC solution, ready for Quebec's humid summers and winters.
The job tools
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.
How the job unfolds
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.
What we check on a job like this one
Each number is a point we check on site. Switch between summer and winter to watch air and heat move.
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.
Is your home ready?
Check what applies at your place. A "no" is not a refusal: it is what we sort out during the estimate.
Good habits, once the unit is in place
Six simple habits that keep the unit going. Your list stays on this device.
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.
The right pages, at the right time
Four statements: true or false?
It all comes down to details you have just seen.
1. In heating mode, the outdoor unit can produce water.
During defrost cycles. That water must drain away without forming ice.
2. You pick the capacity with a simple square-footage rule.
Windows, insulation, orientation and how the room is used all count. Capacity is chosen on site.
3. A multi-zone connects several indoor heads to a single condenser.
One head per room, all on the same condenser. Each room keeps its own temperature.
4. The disconnect can sit behind the patio furniture.
It must stay accessible: it is what shuts the unit off for service.
0 / 4 right answers
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).