Installation of a FUJITSU Aquila R32 Dual-Zone 36,000 BTU Heat Pump in Saint-Eustache
Discover a real-life installation of a FUJITSU Aquila R32 DoubleZone 36,000 BTU heat pump in Saint-Eustache. A high-performance HVAC solution adapted to the climate of Montreal, Laval, and the North Shore.
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.
An HVAC Installation Designed to Withstand Quebec Winters in a Confined Space
In Saint-Eustache, we recently completed a particularly interesting HVAC installation featuring a FUJITSU Aquila R32 DoubleZone 36,000 BTU heat pump (model AOUH36KWAS4). This project stood out due to a challenging outdoor environment, a strategic multi-zone configuration, and meticulous attention to durability in winter conditions.
Upon arrival at the site, we observed a common challenge in homes on the North Shore: limited outdoor space, with significant proximity between walls, railings, and technical access points. In this context, every installation decision has a direct impact on equipment performance and longevity.
A Dual-Zone Configuration Perfectly Suited to the Building
Intelligent Distribution of Thermal Comfort
The chosen configuration for this residence in Saint-Eustache relies on a dual-zone heat pump, allowing for efficient air conditioning and heating of two distinct spaces. This approach offers several advantages:
- Independent temperature control in each zone
- Reduced energy consumption
- Optimized comfort based on room occupancy
In this specific case, we installed:
- An indoor unit for the main living area
- A second unit for a floor or secondary zone requiring distinct control
This strategy is particularly relevant for family homes in Laval, Longueuil, or the South Shore, where needs vary depending on levels and room usage.
Technical Analysis of the FUJITSU Aquila R32 36,000 BTU
Energy Performance and Reliability
The installed model, AOUH36KWAS4, stands out for:
- Cooling capacity: 36,000 BTU
- Heating operation down to -15°C
- R-32 refrigerant (more eco-friendly and efficient)
- SEER2: 22.0 | HSPF2: 10.0 | EER2: 12.0
- Outdoor sound level: 56 dB(A)
These characteristics make it a solid choice for residences in Montreal and the North Shore, where climatic variations demand reliable equipment year-round.
INVERTER Technology: Stability and Savings
Thanks to INVERTER technology, the heat pump continuously adjusts its power. The result:
- Fewer on/off cycles
- Reduced electricity consumption
- Constant temperature without fluctuations
Challenges Encountered During Installation in Saint-Eustache
1. Winter Installation
As seen on the construction site, the installation was carried out with snow and ice on the ground. This implies:
- Ground preparation to ensure a stable base
- Drainage verification to prevent accumulation of frozen water
- Strategic positioning to avoid being buried by snow
2. Elevated Support for Outdoor Unit
We installed the outdoor unit on an elevated metal support. This choice is crucial for:
- Avoiding direct contact with snow
- Protecting the equipment from freezing
- Ensuring optimal air circulation
This is a practice we systematically recommend in cities like Terrebonne, Blainville, or Saint-Eustache, where snow accumulation is significant.
3. Management of Electrical and Refrigerant Connections
On this installation, the connections were visible on the right side of the building, which required:
- Clean and secure cable organization
- Protection against bad weather
- Aesthetic integration with the existing wall
We used professional finishing techniques to ensure a result that is both functional and discreet.
Best Practices Applied by AirGreen
Vacuuming and Micron Test
As with all our installations, we performed:
- A complete vacuum pull
- A stable micron test
This eliminates all moisture from the system, thus preventing:
- Microcracks
- Loss of performance
- Premature failures
Protection of Refrigerant Lines
The pipes were:
- Properly insulated
- Securely fastened
- Protected against climatic variations
Precise Alignment and Leveling
A poorly leveled outdoor unit can lead to:
- Excessive vibrations
- Premature wear
- Reduced efficiency
We therefore took the time to ensure a perfectly straight and stable installation.
Common Mistakes to Avoid During an HVAC Installation
Through our interventions in Montreal, Laval, and the South Shore, we often observe the same mistakes:
- Installing the outdoor unit directly on the ground
- Neglecting the vacuum pull
- Underestimating the importance of location
- Using supports not adapted to the Quebec climate
In this project in Saint-Eustache, every detail was considered to avoid these errors and guarantee optimal long-term performance.
Subsidies and Profitability
This FUJITSU Aquila R32 DoubleZone 36,000 BTU heat pump is eligible for a LogisVert subsidy of approximately $1,180 (according to current updates).
This allows for:
- Reducing the initial cost
- Improving return on investment
- Encouraging a transition to cleaner energy
Field Feedback: A Silent and Efficient System
After commissioning, the results were immediate:
- Silent operation despite the proximity of walls
- Even temperature distribution
- Quick system responsiveness
The client now enjoys stable comfort, even on typical cold days on the North Shore.
Why Choose AirGreen for Your HVAC Installation in Saint-Eustache
At AirGreen, we don't just install equipment. We analyze each situation to offer a sustainable and adapted solution.
Our commitments:
- No payment until satisfied
- Professional installation by certified refrigeration technicians
- Total price transparency
- Recognized expertise in Montreal, Laval, Longueuil, North Shore, and South Shore
Each project is handled with rigor, like the one presented here in Saint-Eustache.
Conclusion: A Durable Installation, Designed for the Quebec Climate
This installation of a FUJITSU Aquila R32 DoubleZone 36,000 BTU heat pump perfectly illustrates our approach: a combination of performance, technical precision, and adaptation to the terrain.
In a challenging environment and under winter conditions, we delivered a reliable, efficient, and durable solution.
For any HVAC installation in Montreal, Laval, Longueuil, North Shore, or South Shore, our team is ready to intervene with the same level of demanding standards.
How it goes, from the first call to the end
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.
And 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.
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.
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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?
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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).