Installation of a FUJITSU Aquila XLTH R32 24,000 BTU dual-zone heat pump in Saint-Lambert
Installation of a FUJITSU Aquila XLTH 24,000 BTU heat pump in Saint-Lambert. High-performance dual-zone solution, ideal for Quebec's climate with available subsidy.
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Strategic HVAC Installation for Optimal Comfort on the South Shore
In Saint-Lambert, on Montreal's South Shore, we recently completed the full installation of a FUJITSU Aquila XLTH R32 24,000 BTU dual-zone heat pump, a choice particularly well-suited to Quebec's climatic realities. This project perfectly illustrates AirGreen's approach: rigorous execution, adaptation to building constraints, and maximum optimization of energy efficiency.
The client wanted to improve the thermal comfort of two distinct zones in their residence, while reducing their energy consumption and benefiting from available subsidies. The objective was clear: to obtain a reliable, high-performance, and discreet solution, capable of operating efficiently even in extreme cold.
Project Analysis and Choice of FUJITSU Aquila XLTH Heat Pump
Why a Dual-Zone Heat Pump?
In this Saint-Lambert residence, the need was to serve two main areas: a living room on the ground floor and a bedroom upstairs. A dual-zone heat pump allows independent temperature control in each room, offering:
- Personalized comfort management
- Significant reduction in energy consumption
- Flexibility of use according to lifestyle habits
Key Technical Features of the Installed Model
The chosen model, FUJITSU Aquila XLTH R32 (AOUH24KWAH3), is renowned for its exceptional performance in cold climates:
- Cooling capacity: 24,000 BTU
- Effective heating capacity down to -26°C
- SEER2: 23.5 | HSPF2: 11.5 | EER2: 13.5
- R-32 refrigerant (more ecological and efficient)
- Outdoor sound level: 52 dB(A)
- ENERGY STAR® certified (cold climate included)
This system also allows for significant modularity with different combinations of indoor units, perfectly adapted to the building's configuration.
Challenges Encountered During Installation in Saint-Lambert
Outdoor Wall Installation on Brick Structure
As seen in the project, the outdoor unit was installed on a brick wall with a reinforced wall bracket. This configuration presents several technical challenges:
- Ensuring solid fixation without compromising wall integrity
- Minimizing vibrations to avoid noise pollution
- Ensuring sufficient clearance for airflow
We used robust brackets with integrated shock absorbers to stabilize the unit and extend its lifespan.
Management of Refrigerant and Electrical Conduits
The routing of refrigerant lines and wiring was optimized to:
- Reduce thermal losses
- Maintain a clean and discreet aesthetic
- Comply with RBQ standards for HVAC installation
Conduits were carefully insulated and precisely fixed to prevent sagging or premature wear.
Strategic Positioning of Indoor Units
Incorrect positioning of wall units can compromise the overall system performance. In this project:
- The living room unit was placed to maximize air distribution in an open space
- The bedroom unit was positioned to avoid direct drafts
This optimization work is essential to ensure constant and uniform comfort.
AirGreen Installation Process: Rigor and Precision
Key Steps Performed on This Project
- Complete thermal evaluation
- Selection of the appropriate system (precise sizing)
- Preparation of supports and conduit passages
- Installation of outdoor and indoor units
- Refrigerant and electrical connection
- Vacuum test and leak check
- System commissioning and calibration
Each step is performed by certified refrigeration technicians, ensuring a compliant and durable installation.
Real Performance in Quebec Conditions
One of the main advantages of the FUJITSU Aquila XLTH is its ability to maintain high performance even in harsh winters. Unlike many standard systems:
- It continues to heat efficiently down to -26°C
- It maintains significant heating power at -15°C (25,200 BTU)
- It includes a pan heater to prevent freezing
This makes it an ideal solution for residents of Montreal, Laval, Longueuil, the North Shore, and the South Shore.
LogisVert Subsidy: Significant Savings
This installation in Saint-Lambert is eligible for the LogisVert subsidy of $1,944, significantly reducing the initial cost.
At AirGreen, we support our clients through all steps:
- Eligibility verification
- Complete documentation
- Submission in compliance with requirements
Advantages of R-32 Refrigerant
The choice of R-32 gas in this installation brings several benefits:
- Better energy efficiency
- Reduced environmental impact
- Less refrigerant charge required
It is a more sustainable solution, in line with new HVAC industry standards.
Client Testimonial – Saint-Lambert
The client particularly appreciated:
- The speed of installation (completed in one day)
- The cleanliness of the site
- The very low noise level of the system
- The immediate comfort obtained
Since installation, both zones have enjoyed stable temperatures, summer and winter.
Common Mistakes to Avoid in This Type of Installation
Even for a high-performance heat pump, certain errors can compromise the result:
- Incorrect system sizing
- Inadequate positioning of indoor units
- Outdoor installation too low (risk of snow and ice)
- Poorly insulated conduits
At AirGreen, we eliminate these risks through detailed planning and rigorous execution.
Why Choose AirGreen for Your HVAC Installation in Saint-Lambert?
Our clients in Saint-Lambert, Longueuil, Boucherville, and throughout the South Shore choose AirGreen for concrete reasons:
- Advanced expertise in multi-zone heat pumps
- No surprises on prices
- Certified and experienced technicians
- Fast and local after-sales service
- Full compliance with standards and best practices
We don't just install systems: we ensure their long-term performance.
Conclusion: An Ideal Solution for the South Shore
This installation of a FUJITSU Aquila XLTH dual-zone heat pump in Saint-Lambert demonstrates that a well-chosen and well-installed system can transform home comfort.
With its cold climate performance, energy efficiency, and flexibility, this model represents an excellent investment for homeowners in Greater Montreal.
At AirGreen, we put our expertise at the service of every project, with a simple goal: to offer lasting, efficient comfort perfectly adapted to Quebec's realities.
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).