Installation of a Zephyr — Wall-mounted heat pump in Rosemont–La Petite-Patrie (Montreal)
AirGreen installs a Zephyr wall-mounted heat pump in Rosemont–La Petite-Patrie: uniform distribution, short cooling path, gravity drain, and clean finish. HVAC services in Montreal, Laval, Longueuil, North Shore, and South Shore, with subsidized support.
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.
Precise comfort and careful aesthetics in a Montreal apartment with limited space
At AirGreen , we design and build HVAC systems tailored to the realities of Greater Montreal . This project in Rosemont–La Petite-Patrie showcases a Zephyr wall-mounted heat pump , chosen for its quiet operation, fine modulation, and discreet visual integration in a living space where every detail counts.
Project objectives and client expectations
From the technical visit, the client formulated clear priorities:
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Responsive cooling in summer and stable supplementary heating in the off-season.
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Daily silence , compatible with teleworking and family evenings.
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Sleek finish : compact device, minimal hood, perfect alignment with the ceiling.
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Energy efficiency and simple HVAC maintenance to maintain performance.
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Prepare the facility for grant eligibility where range performance criteria permit.
Why a Zephyr wall-mounted heat pump for Rosemont?
The wall-mounted heat pump is ideal for Montreal apartments and plexes: it combines air conditioning and heating in a single unit, with a small wall footprint and controlled consumption thanks to the inverter.
Advantages retained for the Zephyr solution:
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Continuous modulation : the machine finely adjusts its power to maintain the setpoint without jolts.
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Low noise level on the evaporator side, a major advantage for multi-purpose rooms.
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Clear controls with discreet front display and motorized flaps to direct airflow.
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Simple design that blends easily into Rosemont's renovated interiors.
Sizing: Our team validated the required capacity based on a thermal load calculation (surface area, solar gains, insulation, infiltration). In this type of room, a 9,000 to 12,000 BTU is often suitable, subject to the results of on-site measurements.
Interior layout: even diffusion and perceived comfort
The choice of wall and installation height determines the quality of comfort . Here, the unit is installed in the upper part , aligned with the ceiling in order to:
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Promote stratification and sufficient airflow to the living area.
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Maintain a clear air return to avoid any circulation short circuit.
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Allow precise adjustment of the shutters to avoid direct blowing towards the workstations and the relaxation area.
We checked the manufacturer's recommended clearances around the supply and return air faceplate to ensure stable flow and limit aerodynamic noise.
Refrigeration, drain and power supply: performance and discretion
The architecture of the apartment allowed for a short route of the refrigeration connections to the outside, which:
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Reduces pressure losses and optimizes seasonal efficiency .
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Limits the volume of visible chutes and improves aesthetics.
Condensate management:
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Installation of a gravity drain with controlled slope and anti-condensation insulation.
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Water load test to validate flow and prevent any backflow.
Electricity:
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Dedicated circuit and protection sized according to the nameplate.
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Clear identification on the electrical panel, in accordance with the requirements in force in Quebec.
AirGreen methodology: from machining connections to commissioning
Each HVAC installation follows a strict protocol:
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Brazing under nitrogen to prevent internal oxidation of the tubes.
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Nitrogen test and documented leak test.
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Deep vacuum draw down to the threshold targeted by the micronmeter, guaranteeing a dry circuit.
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Opening of the fluid and operating tests in cold then in heating: delta T, intensity, control of line temperatures, validation of defrosting.
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Comfort calibration : setpoint, fan speed, shutter orientation, programming of useful functions (standby, automatic restart, filter cleaning).
Upon handover, we present the customer with a user guide and a simplified HVAC maintenance plan to preserve the performance and longevity of the equipment.
Results observed after commissioning
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Temperature stability and low noise , perfect for a living space.
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Responsive air conditioning with even distribution that prevents pockets of hot air.
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Significant energy savings compared to an on/off air conditioner, thanks to modulation.
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Careful visual integration : clear wall, discreet hood, perfectly maintained levels.
Practical advice for apartments and plexes in Montreal
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Sizing : aim correctly, avoid oversizing which causes short cycles.
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Location : maintain clearance above and to the sides, keep the blowing away from rest areas.
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Length of the connections : the shorter it is, the better the performance and the more discreet the installation.
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Condensates : favor gravity ; if not possible, install a silent lifting pump accessible for maintenance.
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Power supply : provide a dedicated circuit and check amperage compatibility.
HVAC maintenance: maintain performance and warranty
To maintain performance season after season:
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Clean filters every 4 to 8 weeks depending on usage and ambient dust.
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Annual AirGreen inspection : evaporator/condenser cleaning, pressure and temperature monitoring, drain and connection insulation check, electrical tightening.
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Around the outdoor condenser: clear snow , ice , leaves and any obstacle to heat exchange.
Grants in Quebec: eligibility principles
Many recent wall-mounted heat pumps , when their efficiency and resistance to extreme cold meet the required thresholds, may be eligible for assistance programs. We support our customers in:
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Verification of criteria according to the installed Zephyr range .
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Preparation of documents and proof of installation by qualified contractor.
Why entrust your project to AirGreen — Montreal, Laval, Longueuil, North Shore, South Shore
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Local expertise : daily interventions in Montreal neighborhoods (plexes, condos, houses).
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Rigor of execution : brazing procedures, deep vacuum , functional tests and commissioning report.
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Finish : harmonized covers, waterproof seals, anti-vibration supports.
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Support : choice of model , HVAC installation , HVAC maintenance and advice on subsidies .
Report on the construction site in Rosemont–La Petite-Patrie
This Zephyr wall-mounted heat pump installation ensures:
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Discreet and precise four-season comfort .
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Uncompromising aesthetic integration .
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Controlled operating costs thanks to modulation and optimized refrigeration path.
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A technical basis that meets the eligibility requirements when the range meets the criteria.
Are you planning an HVAC installation in Montreal , Laval , Longueuil , on the North Shore or the South Shore ? We will support you from sizing to commissioning , with the same high standards as on this Rosemont–La Petite-Patrie project.
Key technical points
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Type : Inverter wall-mounted heat pump .
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Location : high position, clearances respected, shutters oriented for longitudinal diffusion.
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Route : direct crossing, short connections; gravity drain with controlled slope.
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Checks : nitrogen test, deep vacuum , delta T measurements, electrical checks.
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Maintenance : front access to filters, annual HVAC maintenance reminder.
Directions for use
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Stabilize the setpoint and avoid frequent variations; let the modulation work.
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In summer, leave interior doors open to improve air circulation .
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Schedule annual maintenance with AirGreen to maintain performance, quietness and durability.
AirGreen puts its know-how at the service of residents of Greater Montreal for sustainable , efficient and careful installations.
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).