FUJITSU AIRSTAGE J-7S VRF R32 | 48000 BTU - 2 Indoor Units

• BROCHURE: FRENCH
• BROCHURE: ENGLISH

A Mini-VRF architecture designed for the climatic and real estate realities of Quebec

In the Quebec HVAC market, the difference between a satisfactory system and a truly high-performing one is measured over several winters, not just on a spec sheet. At AirGreen, we install and maintain equipment in real-world conditions: intense cold, complex existing buildings, space constraints, acoustic requirements, and high expectations for comfort.
The FUJITSU AIRSTAGE J-7S VRF R32 – 48,000 BTU was developed specifically to address these challenges. It is a next-generation Mini-VRF capable of providing advanced multi-zone control, while maintaining a compact and discreet outdoor unit.

This type of system is particularly relevant for high-end residential buildings, renovated plexes, professional offices, clinics, neighborhood shops and mixed buildings where thermal requirements vary greatly from one area to another, at any time of day.

Understanding VRF logic applied to the AIRSTAGE J-7S

Variable Refrigerant Flow (VRF) technology is based on a fundamental principle: continuously adjusting the amount of refrigerant sent to each indoor unit according to the actual demand. Unlike conventional systems that operate in complete cycles, the AIRSTAGE J-7S modulates its power with great precision.

In practical terms, this means:

• More stable temperatures in each area

• A reduction in temperature differences between rooms

• Better distributed electricity consumption , without unnecessary peaks

• Extended lifespan of mechanical components

In projects we have carried out in Montreal and Laval , this fine modulation has made it possible to solve frequent problems: overheated offices on the south facade, unnecessarily unoccupied air-conditioned areas, or imbalances between floors.

Capacity and intelligent sizing

The 48,000 BTU model offers an excellent compromise between power and flexibility:

• Nominal cooling capacity: 48,000 BTU

• Heating capacity maintained at very low temperatures , with reliable operation down to -26°C

• Current configuration: 2 indoor units

• Scalability: the system can be expanded to include up to 12 indoor units , depending on the network design.

This scalability is a strategic advantage for long-term owners. In several buildings on the South Shore , we intentionally designed the network to allow for the future addition of zones without replacing the outdoor unit.

A compact outdoor unit, designed for urban environments

The AOUK048SSAN7 outdoor unit stands out for its compact size and optimized weight. These features are particularly important in dense neighborhoods where space is limited and regulated.

At AirGreen, we installed this model:

• Under windows without obstructing the opening

• On technical balconies, respecting the guardrail heights

• In narrow backyards in Montreal East and Longueuil

• On flat roofs, with discreet and secure integration

This compact design also reduces handling constraints and limits indirect costs related to installation work.

Heating performance: a non-negotiable criterion in Quebec

A high-performing HVAC system in Quebec must first and foremost be reliable in heating , and this must be true throughout the entire winter season. The FUJITSU AIRSTAGE J-7S was designed to operate stably even during periods of intense cold.

Actual behavior in winter conditions

• Heating operational down to -26°C

• High COP at -8°C , ensuring excellent energy efficiency

• Integrated base heating to protect critical components

• Refrigerant-cooled electronic components, limiting cold-related failures

In installations carried out in Montérégie , we observed remarkable stability during prolonged cold spells, with fewer disruptive defrost cycles and constant indoor comfort, even in the peripheral areas of the building.

Choosing R-32 refrigerant: efficiency and environmental responsibility

R-32 represents a major evolution in the field of HVAC. In addition to offering better thermodynamic performance, it reduces the environmental impact of the system.

Concrete advantages of R-32:

• Reduced global warming potential

• Lower refrigerant charge , reducing risks and losses

• More efficient heat transfer, enabling fine modulation of the system

For multi-unit residential buildings, this choice also facilitates compliance with current standards and reassures property managers about safety aspects.

A wide variety of indoor units for customized comfort

One of the strengths of the AIRSTAGE J-7S lies in the diversity of compatible indoor units. This flexibility allows the system to be adapted to the actual function of each space, rather than imposing a uniform solution.

Configurations frequently recommended by AirGreen

• Slim ducted units : ideal for high-end renovations, limited ceilings and projects where visual discretion is paramount.

• Compact cassettes : often used in offices, meeting rooms and shops, offering homogeneous air distribution.

• Wall units : an efficient solution for well-defined areas, with quiet operation appreciated in workspaces.

• Multi-position air handling units : perfect for integrating VRF into an existing duct network or for serving large open areas.

In an office building in Laval , we combined several types of units to meet distinct uses: administrative areas, consultation rooms and common areas, each with its own requirements for comfort and control.

Pipe flexibility and adaptation to existing buildings

The design of a VRF network is highly dependent on building constraints. The FUJITSU AIRSTAGE J-7S allows for extended piping lengths and significant height differences between units.

This flexibility allows:

• To bypass structural elements without major work

• To optimize pipe routing in old buildings

• To reduce invasive interventions for the occupants

In several renovation projects on the North Shore , this feature has made it possible to preserve existing finishes while completely modernizing the HVAC system.

Subsidies, operating costs and long-term vision

The system is eligible for the LogisVert provincial grant , with an amount of up to $4,296 , depending on the configuration and eligibility of the project. At AirGreen, we systematically integrate this aspect from the design phase to optimize the overall investment.

Beyond the subsidy, the savings materialize over time:

• Reduced electricity costs thanks to VRF modulation

• Less premature wear of components

• More predictable and structured HVAC maintenance

For several owners in Montreal and Longueuil , the return on investment has proven to be faster than expected, particularly in buildings occupied year-round.

AirGreen's expertise: a key factor in real performance

A VRF system, however advanced, depends heavily on the quality of its design and installation. At AirGreen, we place particular importance on:

• The complete thermal analysis of the building

• The precise sizing of the areas

• Rigorous refrigerant management

• Detailed and documented commissioning

Our certified refrigeration technicians have extensive experience with complex HVAC installations , both residential and commercial. This expertise results in more stable, quieter, and truly high-performing systems over the long term.

A scalable and sustainable HVAC solution

The FUJITSU AIRSTAGE J-7S VRF R32 48,000 BTU is designed for homeowners and managers seeking a sustainable, scalable solution adapted to Quebec's climate. It combines precise control, energy efficiency, and installation flexibility, while seamlessly integrating into existing or new buildings.

Contact AirGreen for a personalized analysis

For a detailed evaluation , a transparent submission or advice tailored to your project in Montreal , Laval , Longueuil , on the North Shore or the South Shore , our team is at your disposal.
At AirGreen, we design HVAC solutions designed for today, but especially for the years to come.