Currently viewing No image
Fujitsu
Fujitsu Comfort 2.5kW Reverse Cycle Split System
Cooling2.50kW
Heating3.20kW
Room size10-25 m2
Indoor noise22-46 dB
Warranty5 years
The Fujitsu Comfort 2.5kW reverse cycle split system is a compact, efficient option for bedrooms and small home offices, delivering reliable year-round comfort through all-DC inverter technology and R32 refrigerant.
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 2.5kW Reverse Cycle Split System
▾The ASTH09KNCA is the entry-level unit in Fujitsu General’s Comfort range, pairing the ASTH09KNCA indoor wall unit with the AOTH09KNCA outdoor unit. It delivers 2.5kW of rated cooling and 3.2kW of rated heating, making it appropriate for smaller rooms with moderate heat loads. The all-DC inverter compressor adjusts output continuously rather than cycling on and off, which keeps indoor temperature more stable and reduces peak energy draw.
The unit uses R32 refrigerant with a 590g charge — a smaller charge than older R410A units of similar capacity, which can reduce refrigerant costs over the life of the system. Power supply is standard 230V single-phase, compatible with every standard residential circuit. Outdoor unit weight is 25kg and dimensions are modest, making it straightforward to position in tight spaces alongside a building.
Wi-Fi control is available as an optional add-on via the UTY-NXT-BOX adaptor, which connects the unit to Fujitsu’s app platform. This is not included in the standard set and should be discussed with your installer at quoting stage. All other features — quiet mode, powerful mode, sleep timer, weekly program timer, auto louvre, and auto restart — are standard.
– All-DC inverter technology for variable-speed, stable temperature control
– R32 refrigerant with lower global warming potential than R410A
– Super Quiet Mode at 22 dB(A) during cooling — suitable for overnight use
– Powerful Mode for fast temperature recovery on hot days
– Auto Restart restores previous settings after a power interruption
– Sleep Timer and weekly Program Timer for scheduled operation
Is the Fujitsu Comfort 2.5kW Reverse Cycle Split System right for your home?
▾– Bedrooms requiring quiet overnight cooling or heating
– Small home offices with regular occupancy
– Single rooms in apartments or townhouses up to approximately 20–25 m2
– Spaces where a small footprint outdoor unit is important
Performance & Efficiency
▾Cooling Capacity
2.5 kW
Heating Capacity
3.2 kW
Recommended Room
10–25 m²
Inverter
Yes
YesEER
4.24
COP (Heating)
4.16
Star ratings from Fujitsu ZERL (average climate zone used): cooling 5/4.5/4.5 (hot/average/cold); heating 3.5/3/2.5 (hot/average/cold). Annual EER and annual COP not published by manufacturer.
Noise Levels
▾Indoor Min
22 dB(A)
Indoor Max
46 dB(A)
Outdoor
51 dB(A)
Indoor: 22 dB(A) quiet cooling / 27 dB(A) quiet heating / 46 dB(A) high (both modes). Outdoor: 49 dB(A) cooling / 51 dB(A) heating.
Power & Installation
▾Power Supply
240V Single Phase
Max Power Input
1.6 kW
Max Current
3.8 A
Max Pipe Length
20 m
Max Pipe Height
15 m
Refrigerant & Environment
▾Refrigerant
R32
Dimensions & Weight
▾Indoor (W×H×D)
784 × 270 × 224 mm
Outdoor (W×H×D)
663 × 541 × 290 mm
Warranty
▾Warranty period
5years
5-year full parts and labour warranty.
Model Details
▾Model NameComfort
Model NumberASTH09KNCA
Indoor UnitASTH09KNCA
Outdoor UnitAOTH09KNCA
Features
▾Quiet Mode
Turbo Mode
Sleep Mode
Energy Efficiency & Performance
▾The ASTH09KNCA achieves a rated EER of 4.24 for cooling and a COP of 4.16 for heating, measured under standard Australian test conditions. These indicate that for every kilowatt of electricity consumed, the unit delivers approximately 4.24kW of cooling or 4.16kW of heating — among the higher efficiency figures in the Comfort range.
Under Fujitsu’s Zoned Energy Rating Label (ZERL) system, the unit holds 4.5 stars for cooling and 3 stars for heating in the average climate zone, which represents conditions across much of inland and coastal New South Wales. The inverter operation means the unit runs efficiently at part-load — such as maintaining overnight temperature — rather than drawing maximum power continuously. Pairing this unit with rooftop solar reduces effective running costs during daylight hours given its modest 1.14kW rated cooling input.
Installation Notes for the Fujitsu Comfort 2.5kW Reverse Cycle Split System
▾This system pairs the ASTH09KNCA indoor unit with the AOTH09KNCA outdoor unit.
Published installation details include maximum pipe length of 20m, maximum height difference of 15m, 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 ASTH09KNCA suitable for a bedroom?
Yes. At 2.5kW cooling and a minimum indoor noise level of 22 dB(A) in Super Quiet Mode, it is well suited to bedrooms. It performs best in rooms up to approximately 20--25 m2.
What noise level can I expect overnight?
In Super Quiet Mode, indoor sound pressure is 22 dB(A) during cooling and 27 dB(A) during heating -- both below typical background noise in a quiet bedroom. High fan speed reaches 46 dB(A).
Does the ASTH09KNCA include Wi-Fi as standard?
No. Wi-Fi control requires the optional UTY-NXT-BOX adaptor. Ask your installer to include this at time of installation if remote control is needed.
What is the warranty?
Fujitsu General Australia provides a 5-year full parts and labour warranty on all domestic systems, including the Comfort range.
Can it replace an older split system?
In most cases, yes. Your installer will confirm whether the existing pipe run is within the 20m maximum length and 15m height difference before reusing existing pipework.
Does it work with solar power?
Yes. The unit runs on standard 230V single-phase supply and draws from available solar generation during the day. The 1.14kW rated cooling input is a modest load for most residential solar systems.