Installation of a Zephyr R-32 wall-mounted heat pump in Rosemont–La Petite-Patrie
AirGreen installs two Zephyr R-32 wall-mounted heat pumps in Rosemont – La Petite-Patrie: a sustainable, high-performance HVAC solution adapted to Montreal plexes, for energy-efficient four-season comfort.
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The job on one screen
The article, chapter by chapter
Four-season comfort perfectly integrated into Montreal architecture
At AirGreen , we recently installed Zephyr R-32 wall-mounted heat pumps in a typical duplex in Rosemont–La Petite-Patrie , an iconic residential neighborhood in Montreal. This project perfectly illustrates our expertise in integrating efficient HVAC solutions into brick buildings with metal balconies—without compromising aesthetics or energy performance.
The context of the project: modernizing comfort without altering the charm of a plex
The owners wanted to replace their old air conditioners with an energy-efficient four-season system capable of providing heating in the winter and cooling in the summer , while respecting the building's structure. Their priorities were clear:
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Reduce annual energy bills;
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Enjoy durable and quiet equipment;
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Maintain a discreet exterior installation, suited to the red brick facade.
Choosing the Zephyr R-32 heat pump: efficiency, reliability and respect for the environment
The Zephyr R-32 range was chosen for its environmentally friendly R-32 refrigerant technology , recognized for its stable performance down to −25°C , an essential criterion in Montreal.
These models are also distinguished by:
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High energy efficiency (up to 22 SEER);
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A rapid and constant heating function even in very cold weather;
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A compact design ideal for urban facades;
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Compatibility with Quebec subsidies related to energy efficiency.
The particularities of the installation in Rosemont
Our team installed two Zephyr outdoor units , securely mounted on galvanized wall brackets . This configuration optimizes air circulation while preventing any accumulation of snow on the ground.
Key installation steps:
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Study of the refrigeration route to guarantee a minimal and aesthetic route;
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Fixing the wall brackets with anchors suitable for brick;
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Refrigerant pipes pass through a discreet brown capping , matching the facade;
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Electrical connection to a dedicated service box;
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Pressure and energy performance tests before commissioning.
The refrigerant connections were insulated to withstand temperature variations, while gravity drainage was installed to prevent any water stagnation or winter freezing.
A harmonious and lasting integration
The two units, perfectly aligned under the rear windows, ensure a balanced distribution of comfort between the two dwellings of the duplex. The whole remains aesthetically sober and easily accessible for HVAC maintenance .
The result: an installation that is clean, quiet and efficient , meeting the strictest safety and efficiency standards.
Performance and customer satisfaction
From the first commissioning, the occupants noticed a significant improvement in thermal comfort :
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Rapid cooling of main parts;
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Constant heating even on cold February nights;
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Significant reduction in electricity consumption compared to their old system.
All this with an almost imperceptible noise level , proof of the design quality of the Zephyr units.
Maintenance and durability
At AirGreen , we remind our customers that regular maintenance is the key to long-lasting performance. Annual cleaning of the internal filters , along with checking the refrigerant level and drainage , guarantees these heat pumps a longevity of more than 15 years .
We also offer a complete preventative maintenance program to maintain the optimal performance of each Zephyr system installed in Montreal, Laval, Longueuil and on the North and South shores.
AirGreen: expertise, precision and commitment
This installation perfectly illustrates our approach: tailor-made HVAC solutions, adapted to Montreal's buildings . Every detail—from the choice of support to cable management—is designed to combine efficiency, aesthetics, and durability.
Our mission remains unchanged: to offer residents of Greater Montreal reliable, energy-efficient and accessible comfort , through professional installations by AirGreen.
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).