Installation of a Zephyr (R-32 range) wall-mounted heat pump in Le Sud-Ouest (Montreal)
Installation of a Zephyr wall-mounted heat pump (R-32) under the soffit in Le Sud-Ouest, Montreal: stainless steel brackets, anti-vibration pads, short path, and gravity drainage. An AirGreen project designed for performance and silence.
Take a tour of the installation
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.
A Zephyr wall-mounted heat pump installed under the soffit: performance, silence and four-season protection
At AirGreen , we are currently working in the Le Sud-Ouest borough of Montreal, an area of plexes and flat-roofed buildings with unobstructed views of neighboring roofs. The project involves installing a Zephyr wall-mounted heat pump (recent R-32 range), with a condenser fixed on stainless steel brackets under the soffit and a short, direct cooling path. The objective: to deliver four-season comfort while preserving the aesthetics of the facade and the durability of the envelope.
Why a soffit installation makes a difference
Buildings in the Southwest combine climatic and urban constraints: gusts channeled through the alleys, accumulations of snow on the passageways, narrow passages for maintenance. Positioning the condenser under the soffit , on stainless steel wall brackets , has concrete advantages:
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Natural protection against driving rain and ice, which reduces fin scaling and cleaning frequency.
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Controlled noise : the facade absorbs some of the emissions and the height distances the unit from the living areas on the ground.
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Snow clearance : the unit remains above the accumulation line, limiting the risk of obstruction of the vents.
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Better stabilized performance in winter, because the air intakes are not drowned by gusts at ground level.
The Zephyr choice (R-32): energy efficiency and resistance to cold
Zephyr's R-32 range aims for a balance of performance and reliability adapted to our winters:
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Inverter compressor finely modulate power to maintain a stable temperature without jolts.
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R-32 refrigerant with low GWP compared to older generations, helping to reduce the environmental footprint.
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Typical capacity range from 9,000 to 24,000 BTU, covering the majority of apartments and plex floors.
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Careful acoustics both inside and out, ensuring peace and quiet for neighbors in densely populated areas.
Combined with a rigorous HVAC installation , this profile allows for energy savings compared to electric baseboards and achieves consistent comfort during the freeze/thaw periods specific to Montreal.
Key steps in installing AirGreen on a brick facade
1) Analysis of the support and tracing of the links
We validate the load-bearing capacity of the brick wall and the condition of the joints. The refrigeration connections are designed to be as short as possible up to the interior head, with a continuous slope for gravity drainage of condensate. The proximity of an electrical point is checked to avoid crossed paths.
2) Installation of brackets and anti-vibration management
The stainless steel wall brackets are mechanically anchored with wall plugs suitable for masonry. We insert blue anti-vibration pads under the condenser pads to dampen high frequencies and eliminate any hum that could be transmitted to the home.
3) Installation of the condenser under the soffit
The Zephyr condenser is precisely leveled to meet side and overhead clearances . The orientation ensures unobstructed airflow and prevents hot air from being recycled onto the façade. The soffit height protects the components from wind and blown snow.
4) Copper connections: UV insulation & waterproofing
The connections are sheathed with UV-resistant insulation , protected from exposed rays by butyl tape . The wall penetration is sleeved, sealed with elastomeric mastic to ensure air and water tightness . The bending radius of the tubes is respected to avoid any pressure loss.
5) Electrical connection and safety
A weatherproof outdoor disconnect box is installed within easy reach for maintenance. Grounding is verified, tightening is torqued, and a rain loop is formed before any conduit penetration.
6) Vacuuming, testing and configuration
We perform a deep vacuum and a leak test . The superheat/subcooling parameters are checked, then we perform an acoustic check and a vibration measurement . The calibration of the remote control (setpoints, speeds, modes) concludes the commissioning.
Location details visible on this site
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Fixing under soffit with stainless steel brackets : increased stability and climate protection.
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Anti-vibration pads under the condenser feet for quiet operation.
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Short refrigerated path exiting at the rear of the unit, continuous insulation and neat saddles .
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Disconnect box installed nearby, discreet and easy to access.
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Gravity management of condensates : controlled slope, no pump, therefore increased reliability .
This execution reduces energy losses, simplifies maintenance and preserves the aesthetics of the anthracite brick facade.
What the owner earns in Le Sud-Ouest
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Four-season comfort : air conditioning in summer and heating in the mid-season, with efficient maintenance in cold weather.
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Substantial energy savings compared to resistive systems.
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Silence : the combination of soffit and anti-vibration elements provides a calm atmosphere, useful in dense urban areas.
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Durability : protection against bad weather and ice, limited corrosion thanks to the installation materials.
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Clear facade : no slab on the ground, no encroachment on the courtyard or the alley.
AirGreen Best Practices for Northeast Montreal Facades
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Clearances : strictly respect the distances around the unit to prevent air recycling .
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Snow and frost : Check the accumulation line and keep the space under the unit clear.
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Drainage : check at the end of autumn that condensate flows freely .
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UV protection : monitor the condition of the sleeves and touch up the butyl tape if necessary.
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Maintenance : schedule an annual service (fin cleaning, pressures, tightening, defrost test).
HVAC maintenance: our annual protocol
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Cleaning of coils and filters, straightening of fins if necessary.
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Checking pressures , visual inspection of soldering and fittings.
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Electrical test : tightening, insulation, earth continuity.
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Mechanical inspection : condition of brackets , buffers and stainless steel screws.
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Winter defrosting test and flow control.
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Update of user settings (eco settings, timers).
This protocol maintains seasonal performance and extends compressor life .
Grants and Eligibility: What You Need to Know
Depending on the capacity chosen, seasonal efficiency and current criteria , recent wall-mounted heat pumps may be eligible for incentives in Greater Montreal (programs subject to change). We support our customers in Montreal, Laval, Longueuil , as well as the North Shore and South Shore , to validate model compliance and prepare the necessary supporting documents .
In short
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Equipment type : Zephyr wall-mounted heat pump , R-32 range.
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Installation : condenser under soffit on stainless steel brackets with anti-vibration pads , short connections and UV insulation , disconnection nearby.
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Location : The Southwest (Montreal) .
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Benefits : four-season comfort, silence , energy savings , climate protection and simplified maintenance .
Are you considering a similar HVAC installation on a brick facade or under a soffit in Greater Montreal? Our team sizes, installs, and maintains your wall-mounted heat pump with AirGreen's rigor, from the first sketch to documented commissioning.
The big day, step by step
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 would it look like 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.
Four mistakes we do not make
Flip each card to see what we do instead.
Your own project, step by step
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.
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.
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).