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Fujitsu
Fujitsu Comfort 6.0kW Reverse Cycle Split System
Cooling6.00kW
Heating6.50kW
Room size45-60 m2
Indoor noise31-48 dB
Warranty5 years
The Fujitsu Comfort 6.0kW reverse cycle split system is a capable large-room unit suited to open-plan living and dining areas, family rooms, and larger bedrooms where a single wall-mounted split system is expected to carry the full 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 6.0kW Reverse Cycle Split System
▾The ASTH22KNTA pairs with the AOTH22KNTA outdoor unit and delivers 6.0kW of rated cooling and 6.5kW of rated heating. At this capacity it covers large single rooms and open-plan spaces with moderate ceiling heights — typically 35–50 m2 depending on insulation, glazing, and aspect. The all-DC inverter compressor modulates output continuously, which is particularly valuable in open-plan spaces where heat loads shift throughout the day as occupancy and solar gain change.
The outdoor unit steps up to 632mm height compared to the 542mm of the 18KNTA, and weight increases to 36kg. Pipe connections are 6.35mm liquid and 12.7mm gas, consistent with the other KNTA variants. Maximum pipe length is 25m with a 20m height difference. The 960g R32 refrigerant charge is higher than the smaller units, though R32 remains significantly lower GWP than R410A.
Fujitsu’s product page classifies this unit as suitable for medium rooms, which is conservative given the 6.0kW output. Capacity band has been classified as Large in this library based on cooling output. Wi-Fi control is available via the optional UTY-NXT-BOX adaptor.
– 6.0kW cooling and 6.5kW heating with all-DC inverter control
– R32 refrigerant (960g charge)
– Suitable for open-plan spaces up to approximately 40–50 m2
– Super Quiet Mode at 31 dB(A)
– Auto Restart, Sleep Timer, Program Timer, Auto Louvre, washable panel
– Blue fin outdoor heat exchanger for improved corrosion resistance
Is the Fujitsu Comfort 6.0kW Reverse Cycle Split System right for your home?
▾– Open-plan living and dining areas
– Large family rooms or home theatres up to approximately 50 m2
– Large bedrooms where heating output is as important as cooling
– Homes in the Hunter Valley where summer peaks and winter overnight lows both need addressing
Performance & Efficiency
▾Cooling Capacity
6 kW
Heating Capacity
6.5 kW
Recommended Room
45–60 m²
Inverter
Yes
YesEER
3.37
COP (Heating)
3.51
Star ratings from Fujitsu ZERL (average climate zone used): cooling 3.5/3.5/3.5 (hot/average/cold); heating 3/2/1.5 (hot/average/cold). Annual EER and annual COP not published by manufacturer.
Noise Levels
▾Indoor Min
31 dB(A)
Indoor Max
48 dB(A)
Outdoor
54 dB(A)
Indoor: 31 dB(A) quiet / 48 dB(A) high. Outdoor: 54 dB(A) cooling / 53 dB(A) heating.
Power & Installation
▾Power Supply
240V Single Phase
Max Power Input
1.85 kW
Max Current
8.2 A
Max Pipe Length
25 m
Max Pipe Height
20 m
Refrigerant & Environment
▾Refrigerant
R32
Dimensions & Weight
▾Indoor (W×H×D)
834 × 270 × 232 mm
Outdoor (W×H×D)
799 × 632 × 290 mm
Warranty
▾Warranty period
5years
5-year full parts and labour warranty.
Model Details
▾Model NameComfort
Model NumberASTH22KNTA
Indoor UnitASTH22KNTA
Outdoor UnitAOTH22KNTA
Features
▾Quiet Mode
Turbo Mode
Sleep Mode
Energy Efficiency & Performance
▾The ASTH22KNTA achieves an EER of 3.37 for cooling and a COP of 3.51 for heating. Both figures are lower than the smaller models in the range, which is expected as capacity increases. The heating COP of 3.51 still represents a meaningful efficiency advantage over electric panel heaters or ducted gas heating, delivering 3.51kW of heat per kilowatt of electricity consumed.
Under the ZERL system, the unit holds 3.5 stars for cooling across all three climate zones (hot, average, cold) and 2 stars for heating in the average zone. The cold-zone heating rating of 1.5 stars reflects the reduced heat pump efficiency at low outdoor temperatures — relevant during Hunter Valley winters. For best results in winter, the unit should be run at consistent temperature settings rather than intermittently, which allows the inverter to maintain efficiency at reduced output rather than repeatedly ramping to full capacity.
Installation Notes for the Fujitsu Comfort 6.0kW Reverse Cycle Split System
▾This system pairs the ASTH22KNTA indoor unit with the AOTH22KNTA outdoor unit.
Published installation details include maximum pipe length of 25m, maximum height difference of 20m, power supply: 240v_single_phase.
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 ASTH22KNTA suitable for an open-plan living area?
Yes, for areas up to approximately 40--50 m2 with standard insulation and ceiling heights. For larger or poorly insulated spaces, the 24KNTA or 30KNTA may be more appropriate.
What is the heating output during winter?
Rated heating output is 6.5kW. The unit operates down to -15 degrees Celsius outdoor temperature, covering the full range of Hunter Valley winter conditions.
What noise level can I expect in the living room?
Indoor sound pressure in quiet mode is 31 dB(A), rising to 48 dB(A) at high fan speed. In a typical living room environment with background noise, high-fan operation will be audible but not intrusive.
Does this unit include Wi-Fi?
No. Wi-Fi requires the optional UTY-NXT-BOX adaptor.
What warranty applies?
5-year full parts and labour warranty on all Fujitsu General domestic systems.