FUJITSU CENTAURI R32 Central Heat Pump | 2 Tons - 24000 BTU

A central heat pump designed for Montreal winters… and demanding renovations

When a homeowner calls us to replace an old forced-air system (often an electric furnace, an old central air conditioner, or a furnace + A/C combination that has reached the end of its lifespan), they are generally looking for three things: reliable heating , consistent comfort from room to room, and an HVAC system adapted to the building's specific characteristics (narrow plenums, heterogeneous ductwork, limited mechanical access, noise constraints). The FUJITSU CENTAURI R32 2-ton (24,000 BTU) central heat pump is particularly well-suited to this type of situation because it combines a centralized (ducted) approach with modern features: inverter modulation, R-32 refrigerant, fine-tuned fan control, and integration options (depending on the accessories) that allow for adjustable comfort rather than relying on an on/off operation.

At AirGreen, we frequently recommend it to clients in Montreal , Laval and Longueuil who want to modernize an existing system without turning the project into an endless construction site: we keep the architecture of the duct network when it is sound, then we add a real upgrade in performance, comfort, noise level and temperature stability.

What “2 tonnes – 24,000 BTU” means in practice

On a website, “24,000 BTU” might seem like just another number. In practice, it's a very common capacity for:

• a medium-sized single-family home,

• a duplex/tripleplex with an existing forced-air system,

• a spacious condo with central layout

• some houses on the North Shore or South Shore where the building envelope has been improved (insulation, windows, weatherproofing).

But the real question isn't "how many BTUs nominal." The real question is: how does the system perform when the weather changes rapidly (wind, humidity, day/night temperature variations, extreme cold)? In our climate, a high-performing central heat pump is one that:

• maintains stable comfort

• avoids aggressive cycles,

• better controls humidity in summer

• and remains useful for heating when the temperature drops sharply.

The benefits of R-32 (and why it matters in HVAC maintenance)

R-32 is among the preferred modern refrigerants for reducing environmental impact while maintaining excellent performance. For the customer, the practical benefit is simple: when a refrigeration circuit is installed and commissioned correctly (rigorous vacuuming, leak testing, controlled charging, verified parameters), the result is:

• more stable operation

• fewer performance gaps,

• and better consistency of yield over several seasons.

This is one of the points on which AirGreen is very strict: a central heat pump is a precision system. The difference between “it heats” and “it’s comfortable, stable and quiet” often lies in details invisible to the customer, but crucial over 10–15 years.

Specifications that have a real impact on comfort

When we size and install this type of central heat pump , we never just rely on a spec sheet. We read the numbers while considering the building, the occupants, and the ductwork. These are the elements that truly matter.

Seasonal yield: savings… but above all, stability

Good efficiency in air conditioning and heating translates into more controlled energy consumption. But, on a daily basis, what customers notice most is consistency :

• less overheating

• fewer sensations of “cold drafts”,

• fewer abrupt variations when the system starts up.

In other words: you don't just feel a potentially more attractive bill, you feel a more "calm" comfort.

Operating ranges: a useful system even when things get serious

In Greater Montreal, we can experience periods where the temperature drops sharply, then rises again, then drops again. A central system that remains functional in the cold allows:

• to avoid becoming too quickly dependent on a supplementary source of income,

• to keep the house comfortable without temperature “jumps”,

• to improve the occupants' experience (especially at night).

Our approach: we design for real life. If the house has more vulnerable areas (solarium, basement, poorly insulated floor), we plan for it from the start: adjusting flow rates, balancing, sometimes a well-controlled backup strategy.

The AMUH24KUAS indoor unit: a major advantage in renovation

In many projects in Montreal , the challenge is not “choosing the model”, it’s integration:

• narrow mechanical rooms

• low ceilings,

• Limited access

• plenums cobbled together over the years.

The advantage of a multi-configuration indoor unit is its flexibility: it can be intelligently integrated according to the reality of the building, instead of imposing a configuration that complicates everything.

Static pressure and airflow: the duo that makes or breaks an installation

Many comfort problems don't stem from the heat pump itself, but from the airflow . A central heat pump can be excellent, but if:

• The air return is too small.

• Some pipes are crushed or leaking.

• The filtration is too restrictive without adjustment.

• or the openings are poorly distributed,
  So the result may be disappointing.

At AirGreen, we systematically address these points. A successful project is:

• a consistent flow rate,

• controlled pressure,

• a balanced distribution,

• a uniform temperature.

This also limits noise and improves the everyday experience.

Noise: a comfort that is noticeable from the very first night

Noise level is often underestimated at the time of purchase. Yet, it's one of the first comments we receive after a replacement:

• “We can hardly hear the system anymore.”

• “The room is quieter.”

• “You no longer feel the sudden starts.”

In a multi-storey house, a condo, or a duplex where the mechanical parts are close to the living spaces, this criterion quickly becomes central.

The AOUH24KUAS1 outdoor unit: modulation, stability and comfort in all seasons

An inverter outdoor unit isn't just "more modern". It's primarily a different way of operating:

• instead of starting at full power and then stopping,

• She adjusts her speed,

• maintains the temperature more consistently.

• and reduces aggressive cycles.

Pipe lengths: useful for complicated terrain

In several areas of the South Shore (Boucherville, Longueuil, Saint-Lambert) and Laval , the realities of the terrain sometimes dictate specific outdoor placement: away from a bedroom, sheltered from a wind tunnel, or positioned to facilitate winter maintenance. Generous pipe lengths offer greater installation flexibility, and therefore often a better final result.

Outdoor installation: support, clearance, snow and vibrations

A central heat pump is not a decorative object. Its location must be chosen for:

• respect the clearances,

• limit air recirculation,

• to prevent snow accumulation,

• reduce vibrations (using suitable supports),

• to facilitate access for maintenance.

At AirGreen, we emphasize this point because poor installation can create avoidable irritants: noise, excessive frost, complicated access, neglected maintenance.

AirGreen Installation: What we do differently to make "on-paper" performance a reality

A central heat pump is not simply “installed.” It is tuned . And it is precisely at this point that the majority of systems fall into two categories: those that function “correctly” and those that are truly comfortable.

Our typical sequence (and why it avoids problems)

1. Building analysis : volumes, insulation, glazing, orientation, occupants' habits.

2. Duct inspection : leaks, undersized sections, air returns, plenum, accessibility.

3. Layout plan : interior (condensate, service access) and exterior (clearances, noise, snow, vibrations).

4. Rigorous refrigeration installation : complete procedures to ensure a clean and stable circuit.

5. Settings and balancing : airflow, speeds, heating and cooling behavior.

6. Final check : validation of stability, explanation to the client, maintenance recommendations.

This process is why a customer can tell us, a few days after commissioning: “This is the first time our house has been comfortable everywhere.”

Common mistakes (and how to avoid them)

We often see these situations during replacements:

• Insufficient air return : the system is forced, increases noise and loses efficiency.

• Overly dense filtration without flow rate recalibration: uneven comfort, less efficient ventilation.

• Poorly positioned vents : rooms too hot, rooms too cold.

• Thermostat poorly placed : it “thinks” the house is warm when part of it is cold.

• Poorly designed condensate drain : risk of runoff, especially in basements.

Our role is to anticipate. A successful HVAC project is planned, it cannot be improvised.

Real-life cases: three typical scenarios around Montreal, Laval and Longueuil

1) Duplex in Rosemont–La Petite-Patrie: stable comfort, reduced noise

Existing network, but tight plenum and air returns could be improved. After correcting the critical points and balancing the system, the client observed:

• a more consistent temperature between floors

• a feeling of less “dry” air,

• and above all, a much more discreet operation.

2) House in Laval (Duvernay): optimized exterior layout and service access

The client wanted to minimize noise near the bedrooms. The layout was designed to:

• limit sound transmission,

• preserve access in winter,

• and facilitate seasonal maintenance.

The result: a high-performance system, without compromising on real-world use.

3) Bungalow in Longueuil: clear and controlled backup strategy

Some homeowners want a high-performance central heat pump and a simple strategy for dealing with extreme cold. In this type of project, we clarify:

• Under what conditions does supplemental feeding become useful?

• how it is controlled,

• and how the system remains comfortable without unnecessary overconsumption.

What reassures the customer is not just the machine: it is the overall logic of the heating system.

Control, connectivity and integrations: useful when you want to simplify everyday life

Depending on the options chosen, different objectives can be pursued:

• Simplicity : clear settings, stable programming, comfort without micromanagement.

• Remote control : useful for owners who travel, second homes, or families with variable schedules.

• Integration : when the house already has a home automation ecosystem or centralized control.

Our approach: we recommend the option that truly benefits the customer. Adding accessories only makes sense if it improves usability and stability.

Subsidies and value: what customers want to know right away

For this product, provincial subsidy information is displayed on the product page. In reality, eligibility depends on the applicable criteria and the installation context. At AirGreen, we guide our clients in Montreal , Laval , Longueuil , the North Shore , and the South Shore to ensure everything is clear from the start.

• confirmation of models,

• project coherence

• necessary documentation and evidence,

• and understanding of the process.

The goal: to avoid unpleasant surprises and make the project more profitable.

HVAC Maintenance: How to Protect Your Investment (and Maintain Performance)

A central heat pump performs well when it breathes well, when the flow rate is stable, and when the system remains clean.

Simple maintenance that we recommend to owners

• Filter : replace it according to usage (often every 1 to 3 months). A filter that is too clogged increases pressure, decreases flow, and can reduce comfort.

• Vents and outlets : avoid obstructing them (furniture, curtains), and dust them regularly.

• Outdoor unit : keep the area clear (leaves, snow, debris), especially in winter.

• Annual inspection : an HVAC maintenance visit helps to check stability, component condition, drainage and parameters.

The “minor symptoms” to watch out for

• rooms that are more difficult to heat than before

• a more pronounced hissing sound

• more frequent cycles,

• summer humidity less well controlled

• temperature variation between floors.

These signs do not necessarily indicate a breakdown. Often, adjusting the flow rate, using a more suitable filtration system, or correcting the pipe network will resolve the problem.

Frequently Asked Questions (concrete answers)

Is 24,000 BTU “too much” or “not enough”?

It depends on the building, not the marketing. At AirGreen, we always validate the sizing based on reality: insulation, orientation, volumes, airtightness, and ductwork. Proper sizing is key to:

• avoid overconsumption,

• limit the cycles,

• improve comfort and humidity.

Do I need to redo all my pipes?

Not necessarily. Many existing networks are salvageable, but require repairs (leaks, air return, balancing). We assess each case individually, especially in Montreal buildings where historical modifications are common.

Is it normal for a heat pump to defrost in winter?

Yes. Defrosting is a normal function. What matters is the frequency, duration, and overall performance. A well-thought-out installation, adequate airflow, and rigorous commissioning greatly contribute to maintaining healthy operation.

Why choose AirGreen for this FUJITSU CENTAURI

At AirGreen, we look for the solution that actually works in your building, not just a model that "looks good." Our clients appreciate:

• On-site assessment : validation of constraints, conduits, location, and risk points.

• Transparent pricing : a clear final offer before the work begins, with no surprises.

• Experienced refrigeration specialists and technicians : installation, commissioning, and after-sales service with the same rigor.

• Payment at the end : you pay when you are satisfied with the work.

Our goal is simple: that your FUJITSU CENTAURI R32 2-tonne – 24,000 BTU central heat pump is comfortable, stable, quiet, and easy to maintain for years.

Next Step

Are you considering an HVAC installation or system replacement in Montreal , Laval , Longueuil , the North Shore , or the South Shore ? Contact AirGreen for an on-site estimate and a clear recommendation tailored to your building. We'll guide you from system selection to commissioning, ensuring meticulous installation and noticeable comfort from day one.