Installation of a FUJITSU CENTAURI R32 3-ton (36,000 BTU) central heat pump in Longueuil
HVAC Installation in Longueuil of a FUJITSU 36,000 BTU Central Heat Pump. Uniform comfort, energy efficiency, and a subsidy of up to $3,288. AirGreen expertise in Montreal and the South Shore.
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A complete transformation of residential comfort thanks to perfectly mastered HVAC installation
In Longueuil, in a residential area of modernized 1980s single-family homes, we recently completed a complete HVAC installation of a FUJITSU CENTAURI R32 36,000 BTU (3-ton) central heat pump. This project perfectly illustrates the importance of sizing, air distribution, and quality of execution to achieve real, stable, and lasting comfort.
Behind this installation was a classic problem in the South Shore region: marked temperature differences between the ground floor and the upstairs, inefficient air conditioning during heatwaves, and an aging, underperforming heating system in winter.
Why this choice: a FUJITSU central heat pump adapted to Longueuil's climate
A machine designed for Quebec conditions
The FUJITSU CENTAURI R32 3-ton is a particularly interesting central system for homes with existing ductwork. It offers an excellent balance of performance, stability, and energy efficiency.
Here are the key characteristics of the installed system:
- Capacity: 36,000 BTU (3 tons)
- Refrigerant: R-32 (new generation)
- Certification: ENERGY STAR® (including cold climate)
- AHRI: 217290596
- Effective heating temperature: down to -21°C
- SEER2: 17.6+
- HSPF2: 9.8+
- Voltage: 220V
- Outdoor sound level: approximately 56 dB(A)
- Piping: 3/8 - 5/8
- LogisVert subsidy: up to $3,288
This machine perfectly meets the current requirements of Longueuil homeowners, who are looking for a high-performance heat pump that is eligible for subsidies and reliable in the long term.
A strategic choice based on the actual dwelling
Unlike a generic approach, we took the time to analyze:
- The house's partial insulation
- The existing ductwork network
- Wind exposure
- The room configuration (open-plan vs. closed bedrooms)
This preliminary work allowed us to confirm that the 3-ton size was perfectly suitable, thus avoiding common oversizing errors.
Challenges encountered on the Longueuil site
Confined outdoor space
The outdoor unit, visible in the photo, was installed on a raised base specially designed to:
- Prevent snow accumulation
- Reduce vibrations
- Ensure optimal drainage
Its positioning under an existing structure (such as a balcony or roof overhang) required particular attention to ensure:
- Good air circulation
- Easy access for HVAC maintenance
- Compliance with recommended clearances
Ductwork network optimization
One of the major challenges of this project was air distribution:
- Some rooms received too much airflow
- Others were under-supplied
We proceeded with:
- Complete duct balancing
- Register adjustment
- Validation of air returns
Result: a uniform temperature throughout the house, without excessive energy consumption.
AirGreen installation process: rigor and precision
Key steps performed
Here's how we carried out this central heat pump installation in Longueuil:
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Complete on-site inspection
- Thermal analysis
- Duct verification
- Electrical validation (MCA/MOP)
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Site preparation
- Surface protection
- Piping route planning
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Outdoor unit installation
- Anti-vibration support
- Perfectly adjusted level
- Optimized clearance
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Indoor unit installation (AMUH36KUAS)
- Integration into the duct system
- Hermetic connection
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Vacuum pull (micron test)
- Complete moisture removal
- System airtightness validation
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Commissioning and calibration
- Fan speed adjustment
- System parameterization
A start-up often overlooked... but essential
A poorly adjusted central heat pump can lose a large part of its efficiency. At AirGreen, we place particular importance on this step:
- Precise airflow adjustment
- Thermostat calibration
- Real-world condition tests
Final result: transformed comfort
After installation, the changes were immediate:
- Stable temperature in all rooms
- Significant noise reduction
- Improved nighttime comfort
- Decreased thermal variations
The client particularly noted that the upstairs bedrooms, previously problematic, are now perfectly comfortable, summer and winter alike.
What homeowners absolutely need to know before installing a central heat pump
Frequent mistakes to avoid
Even with an excellent machine like Fujitsu, certain errors can compromise the results:
- Ignoring the condition of existing ducts
- Neglecting air returns
- Installing the outdoor unit too close to the ground
- Omitting the final adjustment
Practical advice
To maximize your investment:
- Always have the sizing validated
- Request a complete duct inspection
- Ensure the installer performs a micron test
- Opt for a contractor specializing in complete HVAC installation
Subsidies and profitability in Longueuil
This installation is eligible for the LogisVert subsidy, which can reach $3,288, significantly reducing the total cost.
In a context of rising energy costs, an efficient central heat pump allows for:
- Reduced consumption
- Improved property value
- Increased daily comfort
Why choose AirGreen for your project in Longueuil
At AirGreen, we don't just sell machines. We deliver complete systems, adapted to each home.
Our commitments:
- Free on-site estimate
- Full price transparency
- Professional installation
- Payment only upon completion of work
- Service throughout Montreal, Laval, Longueuil, North Shore, and South Shore
Every project is treated with the same level of demanding standards, whether it's a small wall-mounted heat pump or a 36,000 BTU central unit.
An ideal solution for Longueuil homes
The FUJITSU CENTAURI R32 central heat pump is particularly suitable for:
- Houses with existing ductwork
- Families seeking uniform comfort
- Homeowners desiring a durable and high-performance solution
In this project in Longueuil, it demonstrated its full potential: stable performance, real comfort, and perfectly successful integration.
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 ducts, the current indoor module, the electrical panel and the planned spot for the outdoor unit.
The equipment combination, capacity and price, in writing. We check whether the combination qualifies for assistance programs.
Access protected, old unit disconnected and removed when it is being replaced.
Electric furnace or air handler, with its coil, connected to the supply and return ducts.
On a level base, raised above the snow, with free space all around.
Insulated, they enter through a sealed opening and run to the indoor coil.
Dedicated circuits, accessible disconnect, a thermostat that works with the heat pump and the backup heat.
Leak test, vacuum, start-up, airflow check and a test of both modes.
Filter, thermostat, backup heat in extreme cold: what to know before winter.
- The on-site estimateWe look at the ducts, the current indoor module, the electrical panel and the planned spot for the outdoor unit.
- The quoteThe equipment combination, capacity and price, in writing. We check whether the combination qualifies for assistance programs.
- Getting readyAccess protected, old unit disconnected and removed when it is being replaced.
- The indoor moduleElectric furnace or air handler, with its coil, connected to the supply and return ducts.
- The outdoor unitOn a level base, raised above the snow, with free space all around.
- The refrigerant linesInsulated, they enter through a sealed opening and run to the indoor coil.
- Electrical and thermostatDedicated circuits, accessible disconnect, a thermostat that works with the heat pump and the backup heat.
- Tests and start-upLeak test, vacuum, start-up, airflow check and a test of both modes.
- The walkthroughFilter, thermostat, backup heat in extreme cold: what to know before winter.
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.
It captures or rejects heat outside. It sits on a level base, above the snow, with free space all around.
The insulated refrigerant lines enter the house through a sealed opening and run to the indoor coil.
A shut-off switch near the outdoor unit isolates it safely for service.
Sitting on the indoor module, it moves heat between the house air and the refrigerant.
Electric furnace or air handler: its fan pushes air through the ducts. The electric backup takes over in extreme cold.
Supply ducts bring air to the rooms; returns bring it back to the unit. Their condition matters as much as the unit's.
It protects the coil and the fan. A dirty filter cuts airflow, so it gets checked regularly.
It runs the heat pump and the backup heat. It must be compatible with the installed system.
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.
- Check the indoor module's filter.
- Clear winter debris from the outdoor unit.
- Test cooling before the heat arrives.
- Check the filter more often in peak season.
- Keep registers and returns clear.
- Watch condensate drainage near the coil.
- Change or clean the filter.
- Test heating and backup heat before the cold.
- Book periodic maintenance.
- Clear snow around the outdoor unit.
- Store nothing in front of the indoor module.
- Note any unusual noise or smell and call us.
The right pages, at the right time
Four statements: true or false?
It all comes down to details you have just seen.
1. A central heat pump uses the house's ducts.
It connects to the existing ducts to heat and cool everywhere.
2. In extreme cold, electric backup heat can take over.
The indoor module (furnace or air handler) works with the heat pump and takes over in extreme cold.
3. The filter only gets changed when the unit breaks down.
A dirty filter cuts airflow. It gets checked regularly.
4. You can reuse the old unit's size without checking.
The house may have changed: insulation, windows, added rooms. Capacity is confirmed on site.
0 / 4 right answers
What people ask us about this kind of work
Can I keep my current ducts?
What happens in extreme cold?
Furnace, air handler, ducted: what is the difference?
Are there grants?
Do I need a permit?
How much can I save?
How is the LogisVert assistance calculated?
Will my current thermostat work?
Central or wall units: which one?
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).