Product Overview

The Fujitsu AIRSTAGE J-II is a small-scale VRF (Variable Refrigerant Flow) system designed for small offices, retail spaces, and large homes.
It provides flexible and efficient climate control through a compact outdoor unit and a wide lineup of indoor units.

Available Capacities:

  • 4 HP: AJ*A36LAH

  • 5 HP: AJ*A45LAH

  • 6 HP: AJ*A54LAH

Indoor Unit Range:
12 types, 52 models, from 2.2 kW to 14.0 kW – ideal for multi-zone applications or complex building layouts (page 1).

High Energy Efficiency

The J-II system incorporates several advanced high-efficiency technologies that deliver significant energy savings and top-class seasonal performance.

Key Energy-Saving Components (page 1):

  • DC Inverter Control:
    Mounted with a new active filter module that optimizes compressor speed for greater efficiency.

  • Large Propeller Fan:
    Achieves higher airflow with optimized blade angles for improved heat exchange and lower noise.

  • DC Fan Motor:
    Compact, multi-stage motor offering quiet operation and enhanced energy efficiency.

  • Subcool Heat Exchanger:
    Improves cooling performance by ensuring stable refrigerant conditions and reducing superheat loss.

  • Large Heat Exchanger:
    Increases surface area for better heat transfer, enhancing both heating and cooling performance.

  • DC Twin Rotary Compressor:
    Ensures smooth operation across all load ranges, particularly improving efficiency under part-load conditions.

Performance Advantages

High EER & COP (Energy Efficiency Ratio / Coefficient of Performance)

  • 4 HP: EER 4.53 / COP 5.75

  • 5 HP: EER 4.40 / COP 5.35

  • 6 HP: EER 4.20 / COP 5.30

High Part-Load Efficiency (6 HP Model)

  • EER (Cooling): +66% improvement (5.73 vs. 3.45 standard)

  • COP (Heating): +46% improvement (5.75 vs. 3.95 standard)

These metrics reflect the J-II’s superior performance under real-world operating conditions, where systems typically run at partial load rather than full capacity (page 1, lower section).

Market Application

The J-II Series is ideal for:

  • Multi-room offices or small commercial buildings.

  • Large residential homes requiring zoning capability.

  • Projects needing compact outdoor space but requiring multiple indoor units.

It bridges the gap between split systems and large commercial VRF systems, offering professional-grade control and energy savings in a smaller footprint.

Sales Key Points

  1. Compact and Versatile: Wide indoor range and flexible design options.

  2. Energy Optimized: DC twin rotary compressor and inverter-driven components deliver outstanding seasonal efficiency.

  3. Low Noise and Reliable Operation: Advanced fan design and precision engineering minimize vibration and operational noise.

  4. Proven Fujitsu Reliability: Manufactured to meet global standards with comprehensive quality assurance.

  5. Strong ROI for End Users: Lower energy consumption, reduced running costs, and quiet comfort for commercial and residential environments.