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Fujitsu
Fujitsu Comfort 8.5kW Reverse Cycle Split System
Cooling8.50kW
Heating9.00kW
Room size60-80 m2
Indoor noise32-51 dB
Warranty5 years
The Fujitsu Comfort 8.5kW reverse cycle split system is a high-capacity wall-mounted unit designed for large open-plan areas and combined living spaces where a single split system is expected to manage a substantial heating and cooling load.
Final sizing should be confirmed through an on-site assessment, as insulation, ceiling height, glazing, sun exposure and room layout can all affect the right unit choice.
Overview of Fujitsu Comfort 8.5kW Reverse Cycle Split System
▾The ASTH30KNTA pairs with the AOTH30KNTA outdoor unit, delivering 8.5kW of rated cooling and 9.0kW of rated heating. This output level is suited to larger open-plan living areas, extended kitchen-dining-lounge combinations, and commercial-adjacent applications such as large showrooms or workshop offices where a wall-mounted unit is preferred over a ducted system. The all-DC inverter compressor operates across a wide range — 2.9 to 10.5kW cooling and 2.7 to 11.2kW heating — giving the unit significant headroom for peak-day demand.
The indoor unit steps up in physical size: 1150mm wide and 340mm high, with a depth of 280mm. This is a noticeably larger unit on the wall and requires adequate clear wall space for installation and airflow. The outdoor unit is 53kg and stands 788mm tall — it should be mounted on a purpose-built bracket or reinforced slab, and structural support should be confirmed prior to installation. Pipe connections increase to 9.52mm liquid and 15.88mm gas, with a maximum run of 30m.
Refrigerant charge is 1,700g of R32. The outdoor heat exchanger uses blue fin corrosion treatment. Operating range extends down to -15 degrees Celsius for heating, which covers the full range of Hunter Valley winter conditions.
– 8.5kW cooling and 9.0kW heating — extra-large capacity for big open-plan spaces
– Wide inverter operating range: 2.9–10.5kW cooling
– Larger indoor unit (1150mm wide) for higher airflow delivery
– 30m maximum pipe length
– R32 refrigerant (1,700g charge)
– Blue fin outdoor heat exchanger for corrosion resistance
Is the Fujitsu Comfort 8.5kW Reverse Cycle Split System right for your home?
▾– Large open-plan living, dining, and kitchen areas up to approximately 60–70 m2
– Combined family rooms and entertaining areas with high occupancy
– Large home offices or workshop spaces where a wall unit is preferred over ducted
– Hunter Valley homes with high summer heat loads from extensive glazing or poor roof insulation
Performance & Efficiency
▾Cooling Capacity
8.5 kW
Heating Capacity
9 kW
Recommended Room
60–80 m²
Inverter
Yes
YesEER
3.41
COP (Heating)
3.77
Star ratings from Fujitsu ZERL (average climate zone used): cooling 4/3.5/4 (hot/average/cold); heating 4/3/2 (hot/average/cold). Annual EER and annual COP not published by manufacturer.
Noise Levels
▾Indoor Min
32 dB(A)
Indoor Max
51 dB(A)
Outdoor
55 dB(A)
Indoor: 32 dB(A) quiet / 51 dB(A) high cooling / 48 dB(A) high heating. Outdoor: 53 dB(A) cooling / 55 dB(A) heating.
Power & Installation
▾Power Supply
240V Single Phase
Max Power Input
2.49 kW
Max Current
11 A
Max Pipe Length
30 m
Max Pipe Height
20 m
Outdoor unit weighs 53 kg; confirm structural support at installation location.
Refrigerant & Environment
▾Refrigerant
R32
Dimensions & Weight
▾Indoor (W×H×D)
1150 × 340 × 280 mm
Outdoor (W×H×D)
940 × 788 × 320 mm
Warranty
▾Warranty period
5years
5-year full parts and labour warranty.
Model Details
▾Model NameComfort
Model NumberASTH30KNTA
Indoor UnitASTH30KNTA
Outdoor UnitAOTH30KNTA
Features
▾Quiet Mode
Turbo Mode
Sleep Mode
Energy Efficiency & Performance
▾The ASTH30KNTA achieves an EER of 3.41 for cooling and a COP of 3.77 for heating. These are the higher efficiency figures among the extra-large units in the range, with the EER closely matching the smaller 18KNTA variant. Under the ZERL system, the unit holds 3.5 stars for cooling in the average climate zone (4 stars hot and cold) and 3 stars for heating in the average zone — notably higher heating efficiency than the 22KNTA and 24KNTA, and consistent with the ASTH09KNCA at the lower end of the range.
The input power range for cooling extends up to 4.0kW under maximum demand conditions, which is a significant load. For properties with solar generation, peak summer demand on hot afternoons will likely exceed solar output, so connection to a battery or grid tariff management should be considered to control running costs. At typical part-load operation (maintaining temperature rather than pulling down), inverter efficiency will be substantially better than the rated figures.
Installation Notes for the Fujitsu Comfort 8.5kW Reverse Cycle Split System
▾This system pairs the ASTH30KNTA indoor unit with the AOTH30KNTA outdoor unit.
Published installation details include maximum pipe length of 30m, maximum height difference of 20m, power supply: 240v_single_phase.
Outdoor unit weighs 53 kg; confirm structural support at installation location.
A site assessment should confirm unit placement, pipe route, drainage, electrical requirements and final room sizing before installation.
Warranty Information
▾This unit has a 5-year warranty, based on the warranty information recorded for this model.
5-year full parts and labour warranty.
Warranty coverage depends on correct installation, normal use, maintenance requirements and the manufacturer’s current warranty terms.
Frequently Asked Questions
▾Is the ASTH30KNTA suitable for a very large open-plan area?
Yes, for areas up to approximately 60--70 m2 depending on insulation, ceiling height, and aspect. For poorly insulated or north-facing spaces in this size range, a site assessment is recommended before specifying.
How large is the indoor unit?
The indoor unit is 1150mm wide, 340mm high, and 280mm deep. This is significantly larger than the 834mm-wide KNTA models and needs to be accounted for in wall placement.
What does the outdoor unit installation require?
The AOTH30KNTA weighs 53kg. It must be mounted on a properly rated wall bracket or reinforced concrete slab. Your installer will confirm the appropriate support method at site assessment.
What is the noise level?
Indoor quiet mode is 32 dB(A). Outdoor sound pressure is 53 dB(A) cooling and 55 dB(A) heating. For large open-plan spaces the indoor noise level is generally not a concern; outdoor placement relative to neighbours should be considered.
What is the warranty?
5-year full parts and labour warranty on all Fujitsu General domestic systems.
Does it work with solar?
Yes, though the maximum input draw of approximately 4kW (cooling) exceeds what most residential solar systems can fully cover at peak. It will draw from available solar generation and supplement from the grid as needed.