The Fujitsu Airstage SET-ASTH18KNTA is a powerful reverse-cycle wall-mounted air conditioner designed for medium to large rooms. Delivering 5.0kW rated cooling and 5.2kW rated heating, it provides efficient year-round comfort for living areas, open-plan spaces, offices and other larger rooms.
The Comfort Series combines a compact modern indoor unit with inverter operation, R32 refrigerant and an extended cooling operating range up to 50°C, making it well suited to demanding Australian conditions.
Features
5.0kW rated cooling capacity
5.2kW rated heating capacity
Reverse-cycle heating and cooling
Inverter-controlled operation
Compact, modern indoor-unit design
R32 refrigerant with lower global-warming potential
Cooling operation in outdoor temperatures up to 50°C
Precise temperature adjustment in 0.5°C increments
Powerful Mode for rapid heating or cooling
Economy Mode for reduced compressor power consumption
Super Quiet indoor operation
Automatic heating and cooling changeover
Automatic restart following a temporary power interruption
Automatic up-and-down swing louvre
Sleep, program and on/off timers
Washable front panel
Filter-cleaning reminder
Blue Fin outdoor heat-exchanger protection
Demand Response Enabled Device terminal
Optional anywAiR Wi-Fi control
Optional touchscreen and simple wired controllers
Indoor & Outdoor
| Specification | Details |
|---|
| Indoor Model | ASTH18KNTA |
| Indoor Dimensions | 270 × 834 × 232mm |
| Indoor Weight | 11kg |
| Outdoor Model | AOTH18KNTA |
| Outdoor Dimensions | 542 × 799 × 290mm |
| Outdoor Weight | 33kg |
| Pipe Sizes | 6.35mm liquid / 12.70mm gas |
| Refrigerant | R32 |
| Cooling Capacity | 5.0kW rated; 0.9–5.6kW operating range |
| Heating Capacity | 5.2kW rated; 0.9–7.0kW operating range |
| Air Flow | 225L/s cooling and heating on high fan |
| Drain | 13.0mm ID / 15.8–16.7mm OD |
| Power Supply | 220–240V, single-phase, 50Hz |
| Max Current | 13.0A |
Performance Specifications
| Specification | Cooling | Heating |
|---|
| Rated Capacity | 5.0kW | 5.2kW |
| Capacity Range | 0.9–5.6kW | 0.9–7.0kW |
| Rated Input Power | 1.44kW | 1.33kW |
| Input-Power Range | 0.14–1.74kW | 0.12–2.17kW |
| Running Current | 6.4A | 5.8A |
| EER / COP | 3.47 | 3.91 |
| Indoor Sound Pressure – High | 46dBA | 46dBA |
| Indoor Sound Pressure – Quiet | 27dBA | 29dBA |
| Outdoor Sound Pressure | 49dBA | 49dBA |
Additional Specifications
| Specification | Details |
|---|
| Set Code | SET-ASTH18KNTA |
| System Type | Reverse-cycle inverter split system |
| Recommended Breaker | 16A |
| Moisture Removal | 2.3L/h |
| Outdoor Sound Power Level | 61dBA |
| Maximum Pipe Length | 25m |
| Factory-Precharged Pipe Length | 15m |
| Maximum Height Difference | 20m |
| Cooling Operating Range | −10°C to 50°C |
| Heating Operating Range | −15°C to 24°C |
| Factory Refrigerant Charge | 890g |
| Cooling Star Rating – Hot/Average/Cold | 3.5 / 3.5 / 3.5 |
| Heating Star Rating – Hot/Average/Cold | 3.0 / 2.5 / 2.0 |
| TCSPF – Hot/Average/Cold | 5.395 / 5.122 / 5.491 |
| HSPF – Hot/Average/Cold | 4.961 / 4.280 / 3.575 |
Optional Controls and Accessories
| Accessory | Model Number | Details |
|---|
| anywAiR Technology Wi-Fi Adaptor II | UTY-NXT-BOX | Enables smartphone and tablet control through the myanywAiR Next app |
| Wi-Fi Adaptor Connection Cable | UTY-NXT-CAB | Required when installing the UTY-NXT-BOX on the ASTH18KNTA |
| Kagami Wired Remote Controller | UTY-RVRY | Premium mirrored-glass touchscreen controller; requires UTY-TWRXZ2 |
| LCD Touch-Panel Controller | UTY-RNRYT5 | Backlit touchscreen wired controller; requires UTY-TWRXZ2 |
| Simple Controller with Mode Selection | UTY-RSRYT | Simplified wired controller with mode control; requires UTY-TWRXZ2 |
| Simple Controller without Mode Selection | UTY-RHRYT | Simplified wired controller without mode control; requires UTY-TWRXZ2 |
| Two-Wire Communication Kit | UTY-TWRXZ2 | Required when connecting a compatible two-wire wired controller |
Wi-Fi Control
When fitted with the optional UTY-NXT-BOX Wi-Fi Adaptor II and UTY-NXT-CAB connection cable, the system can be operated through Fujitsu’s free myanywAiR Next application using a compatible smartphone or tablet.
Wi-Fi components are sold separately and require professional installation.
Wired Controller Requirements
The ASTH18KNTA requires the UTY-TWRXZ2 communication kit when connecting an optional two-wire wired controller, including:
UTY-RVRY Kagami controller
UTY-RNRYT5 touch-panel controller
UTY-RSRYT simple controller
UTY-RHRYT simple controller
The communication kit, controller and field-installed controller cable are sold separately.
Typical Applications
Medium to large living rooms
Open-plan residential areas
Apartments
Home offices
Consulting rooms
Retail stores
Small commercial offices
Restaurants and cafés
Residential renovations and extensions
Important Information
This set comprises the ASTH18KNTA indoor unit and AOTH18KNTA outdoor unit.
Wi-Fi components and optional wired controllers are sold separately.
The UTY-TWRXZ2 communication kit is required when installing an optional two-wire wired controller.
Available controller functions depend on the selected controller and system configuration.
Capacity suitability should be confirmed through an appropriate room heat-load assessment.
Installation must be completed by a suitably qualified and licensed air-conditioning installer.
Source: Fujitsu Airstage Comfort Range Australian Brochure – January 2025.
