Installation of a wall-mounted Zephyr heat pump in Saint-Laurent
Installation of a Zephyr heat pump in Saint-Laurent: a high-performance and discreet wall-mounted solution, perfectly suited to Montreal roof terraces, carried out by AirGreen, experts in residential HVAC.
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 rooftop installation combining performance and discretion
At AirGreen , we recently installed a Zephyr wall-mounted heat pump in a residential building in Saint-Laurent , an area where indoor comfort and efficient outdoor space management are essential. This project perfectly illustrates how our teams manage to combine energy performance , visual discretion and technical compliance , even in restricted access contexts such as roof terraces.
Limited space, a suitable solution
The Zephyr compressor, installed on a raised platform , finds its place between two guardrails. This configuration is not insignificant:
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It ensures optimal air circulation around the unit.
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It avoids any direct contact with the surface of the flat roof, thus limiting vibrations and the risk of water stagnation.
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It ensures increased safety during maintenance operations thanks to easy access from the terrace.
Our technicians carefully positioned the exterior unit to avoid any visual obstruction of the windows, while maintaining a safe distance from the walls according to the clearance standards of the manufacturer Zephyr .
A compact and silent system
The Zephyr wall-mounted heat pump chosen by the customer combines energy efficiency and acoustic discretion —two essential criteria in a dense residential environment. This model, designed for the Quebec climate , maintains its performance even in extreme cold, with stable operation down to −25°C .
The reverse cycle system allows for rapid heating in winter and consistent cooling in summer. In addition, its variable compressor (inverter) technology automatically adjusts power to maintain a constant temperature while reducing electricity consumption.
A compliant and sustainable installation
The technical details of this installation illustrate AirGreen's rigor:
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Refrigeration piping protected by discreet covered wiring .
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Electrical connections made according to the standards of the Quebec Building Code .
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Use of a galvanized steel support , resistant to corrosion and thermal variations.
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Gravity condensation management, adapted to the flat roof configuration.
Each step, from drilling to anchoring, has been validated to guarantee the watertightness of the roof and the durability of the system.
Why choose Zephyr?
The Zephyr brand is increasingly establishing itself in residential projects in Quebec thanks to its:
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Low temperature performance , comparable to major Japanese brands;
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Greener and more efficient R-32 systems ;
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High-density filters that improve indoor air quality;
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Extended warranty backed by AirGreen and authorized distributors.
In addition to offering excellent value for money, Zephyr is eligible for provincial grant programs such as LogisVert and Chauffez Vert , making this type of installation even more advantageous for homeowners.
AirGreen expertise, from diagnosis to completion
This project once again demonstrates the versatility and precision of our teams. From selecting the right equipment to final installation , each step was carried out with care. Our RBQ #5645-9605-01 certified technicians ensure that all installations comply with local requirements, safety distances, and the promised performance.
We pay particular attention to visual discretion , essential for condominiums and urban housing. The result: an efficient, silent, aesthetic system that is perfectly integrated into the building's architecture.
A sustainable and energy-efficient investment
By choosing a Zephyr heat pump installed by AirGreen, the customer benefits from a high energy efficiency system , trusted local service and professional monitoring throughout the life cycle of the device.
At AirGreen, we don't just install units: we optimize the comfort of each space based on the realities of the Quebec climate and the architectural features of each building.
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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Every house has its constraints. We see them before we install.
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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).