Installation of a Zephyr wall-mounted heat pump in Saint-Laurent
Installation of a Zephyr wall-mounted heat pump in Saint-Laurent. A high-performance, quiet, and compact unit, ideal for urban balconies. This project was created by AirGreen, experts in HVAC installation in Montreal and the surrounding area.
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 compact and efficient installation for a protected urban balcony
At AirGreen , we recently installed a Zephyr wall-mounted heat pump in a condo in Montreal's Saint-Laurent district . The project aimed to provide optimal thermal comfort while respecting the space and structural constraints typical of reinforced concrete balconies and modern facades.
A Zephyr model designed for the Quebec climate
The Zephyr heat pump chosen by the customer is part of our high-efficiency residential range, designed to operate efficiently down to -25°C . Compact, quiet and durable, this unit is distinguished by:
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Its Inverter compressor , guaranteeing stable performance and reduced energy consumption;
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Smart defrosting , essential for Montreal's harsh winters;
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Compatibility with Quebec subsidies , thanks to its high energy efficiency.
Precise and robust wall mounting
In this installation, our technicians opted for a reinforced galvanized wall bracket , securely attached to a concrete block wall. This type of mounting is ideal when floor space is limited—such as on a balcony or elevated deck .
We have added:
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Blue anti-vibration pads to reduce noise pollution and protect the structure;
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An optimized drainage slope , allowing gravity flow of condensates;
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A discreet white capping , ensuring the protection and aesthetics of the refrigeration path.
Technical details and professional finishes
Our teams followed the best HVAC installation practices:
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Refrigerant line length : about 3.5 meters, carefully insulated;
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Waterproof perforation with integrated vapor barrier;
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Electrical wiring protected by rigid conduit conforming to RBQ standards;
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Complete check of pressures and vacuum draw before starting.
A perfect adaptation to the urban lifestyle
The owner, who wanted a solution that was efficient, discreet, and aesthetically pleasing , particularly appreciated the compact configuration of this wall-mounted heat pump. The unit 's positioning under the metal canopy protects it from the elements—a considerable advantage in an urban environment exposed to snow and rain.
Long-term performance and savings
Thanks to this Zephyr system, the customer now benefits from:
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Constant comfort in summer and winter ;
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From a reduction in electricity costs ;
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Simple and accessible maintenance , promoting the longevity of the device.
At AirGreen, every installation is designed down to the smallest detail to maximize performance and durability . Our approach combines technical expertise , compliance with standards , and aesthetic care to ensure an impeccable experience for every customer in Greater Montreal.
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).