Zephyr wall-mounted heat pump installation in Sainte-Dorothée (Laval): a clean, robust, and winter-ready dual configuration
In Sainte-Dorothée (Laval), AirGreen installed two Zephyr wall-mounted heat pumps with wall brackets, outdoor disconnect switch and complete commissioning (vacuum/pressures) for reliable comfort in summer and winter.
- City
- Region
- Equipment
- Brand
- Challenges
- Published
The job on one screen
The article, chapter by chapter
When a client contacts us to efficiently heat and cool a home on the North Shore , it often turns out that a single unit isn't enough to meet all the desired comfort levels (multiple floors, enclosed rooms, remote areas, varying sun exposure, etc.). In Sainte-Dorothée (Laval) , our AirGreen team recently completed a residential installation using two Zephyr wall-mounted heat pumps (dual configuration, with two outdoor units), with a very precise approach: performance, durability, aesthetics, and reliability in Quebec conditions.
The photos clearly show an installation being commissioned: pressure manifold , vacuum pump , service hoses, and above all, a perfectly aligned outdoor installation on robust wall brackets . These details speak volumes about the quality of workmanship—and the customer's peace of mind.
A simple, efficient residential HVAC solution well-suited to Laval homes
Here we have a wall-mounted heat pump (mini-split/wall unit) — a very popular technology in Montreal and Laval because it offers:
-
Efficient heating during the cold seasons (and very economical in the shoulder seasons)
-
Stable and quiet air conditioning in summer
-
Zone-based control : each space can be managed according to needs
-
Installation is less invasive than a central system (no large pipes to add)
In this project, the chosen configuration includes two Zephyr outdoor units installed side by side. In practice, this type of installation is often chosen when:
-
We want two completely independent zones (e.g., ground floor + first floor),
-
We want to optimize performance by zone.
-
or when the internal configuration of the building is better suited to two separate circuits.
Installed brand: Zephyr
Since the brand name was provided manually, we are using it as a reference: it is indeed Zephyr equipment.
Model
The exact model is not clearly visible in the photo. We therefore deliberately remain precise without making any assumptions: Zephyr new generation wall-mounted heat pump , selected and sized according to the actual loads of the building (surface area, insulation, orientation, lifestyle, etc.).
Visible installation details: what you notice immediately (and why it's important)
Even without seeing the inside, the outside gives several very concrete clues about the rigor of the work.
1) Outdoor units on wall brackets: protection against snow and improved longevity
The two Zephyr condensers are mounted on securely anchored metal wall brackets . This is an excellent choice in Quebec because:
-
we keep the unit elevated : less risk of being buried during snowstorms;
-
The device is protected from accumulations of water , mud and ice on the ground;
-
Maintenance is made easier (clearance, visual inspection, cleaning).
This type of installation is also ideal when landscaping needs to remain clean: flowerbeds, hedges, traffic, lawnmower, etc.
2) Alignment, clearances and airflow: performance also depends on this
The units are installed with consistent clearances for air intake and exhaust. A condenser that is too close or poorly positioned can lose efficiency and put unnecessary strain on the system.
At AirGreen, we don't just install a machine: we ensure that the air circulates properly, that future service will be possible, and that the device will not be choked by the environment.
3) External electrical disconnect switch: safety + compliance
On the right, you can see an electrical disconnect box near the units. This is essential for:
-
safety during maintenance,
-
compliance with standards
-
and rapid intervention in case of diagnosis.
A proper installation is also a “logical” installation for the technicians who will come later.
4) Professional commissioning: vacuum, pressures, sealing
The visible manifold and vacuum pump indicate a structured commissioning process :
-
Vacuuming to remove moisture and contaminants
-
leak testing,
-
Pressure control and stabilization.
This is one of the key differences between a quick fix and a long-lasting installation. Moisture in the lines, for example, can cause long-term problems. Therefore, we take these steps very seriously and systematically.
Why this type of Zephyr configuration is interesting for a house in Sainte-Dorothée
Saint Dorothy often combines houses with:
-
several levels,
-
open areas + closed rooms,
-
facades exposed to the sun,
-
and sometimes very different needs between day and night.
A “dual” approach (two outdoor units) typically allows:
-
improved modularity ,
-
improved stability and comfort ,
-
and often a “gentler” operation (fewer aggressive cycles), therefore quieter and more pleasant.
In terms of usage, the customer generally benefits from:
-
immediate comfort with air conditioning in the summer (better controlled humidity),
-
efficient heating in autumn and spring,
-
and a significant reduction in reliance on other sources of heating.
The AirGreen approach: performance, finish and peace of mind
What we particularly like about this project is that everything has been designed to be:
-
visually clean (alignment, supports, organized cabling),
-
easy to maintain (access, disconnect switch, clearances),
-
sturdy enough for winter (raising, installation),
-
reliable in the long term (full commissioning).
Beyond the Zephyr brand, it's the quality of the installation that makes the difference: a high-performance heat pump that's poorly installed loses much of its effectiveness. Conversely, a methodical installation maximizes efficiency, reduces the risk of unwanted noise, and extends the lifespan.
Conclusion: a clean, efficient Zephyr installation perfectly suited to Greater Montreal
This installation in Sainte-Dorothée (Laval) illustrates exactly the kind of residential project we carry out every week: a modern HVAC solution, designed for the real comfort of the occupants, and executed with high standards.
If you are looking for a Zephyr wall-mounted heat pump (or a multi-zone/dual-zone configuration depending on your home), our AirGreen team will assist you from A to Z: needs analysis, equipment selection, clean installation, complete commissioning and usage advice to maximize efficiency.
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.
More jobs to see, near you
By town, by equipment or by region: browse more than 4,700 published projects.
Each dot: a town where AirGreen has published projects. The glowing dot: this job.
An on-site estimate, the right capacity, the right equipment.
The on-site estimate is free and the quote follows within 24 hours.
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).