5 kWFujitsu Lifestyle 5kW Split System
The 5kW Fujitsu Lifestyle Split (model ASTG18KMTC) is sized for living rooms and master suites. As a guide, it cools a room of up to about 36 to 43 m². That is from Mitsubishi Heavy Industries' sizing chart for an insulated room: the larger figure if it faces north, the smaller if it faces east. Western sun, poor insulation and high ceilings bring it down. It sits in the lower half of the Fujitsu Lifestyle Split range. If the space is bigger, has high ceilings or strong afternoon sun, step up to the 6kW.
Part of the Fujitsu Lifestyle Split range, Fujitsu General's split system line, in 7 sizes. Running costs below use the Sydney median rate; the Eastern Suburbs and Western Sydney pages cost systems on their own network tariffs. Check the size against your rooms, compare it with other 5 kW options, see every 5kW split system ranked by running cost, or ask about supply and installation.
About $356 a year at the current Sydney median electricity rate: $114 of cooling plus $242 of heating, from the official GEMS test figures.
The Fujitsu Lifestyle 5kW uses 344 kWh annually for cooling and 730 kWh annually for heating according to official GEMS test data for Sydney's climate zone. These figures reflect typical yearly operation in Sydney conditions. The system achieves a cooling efficiency rating of 4.5 stars and a heating efficiency rating of 2.5 stars. It has a rated cooling efficiency (AEER) of 4.30 and heating efficiency (ACOP) of 4.68.
Your running costs depend on your local electricity rate and how often you use cooling versus heating. The official annual energy consumption figures above let you calculate expected costs based on current Sydney rates. The unit uses R32 refrigerant and is sized at 5 kW cooling capacity.
Source: Australian GEMS registry · median of 170 Sydney residential tariffs, including GST · Refreshed monthly · Last updated October 2026
Specifications
From the manufacturer’s published range data. We confirm the exact configuration when we quote.
About the Fujitsu Lifestyle Split range| Brand | Fujitsu General |
|---|---|
| Model | ASTG18KMTC |
| Series | Fujitsu Lifestyle Split |
| System type | Split System |
| Capacity | 5 kW |
| Refrigerant | R32 |
| Warranty | 5 year parts & labour |
Fujitsu Lifestyle 5kW: your questions
How much does a 5kW split system cost installed?
The unit is only part of the cost. Installed price depends on whether it is a straightforward back to back installation or needs longer pipe runs, wall brackets or a condenser slab, plus any electrical work at the switchboard. You get a fixed price in writing before any work starts. Photos of the wall, the outdoor spot and your switchboard help us price the job, and if it needs a look first, we book a site visit.
What size room does a 5kW air conditioner suit?
A 5kW split system cools a room of up to about 36 to 43 square metres as a guide. That is from Mitsubishi Heavy Industries' sizing chart for an insulated room: the larger figure if it faces north, the smaller if it faces east. Strong afternoon sun, high ceilings or big glass areas push you toward the next size up, and oversizing wastes money on short cycling. The capacity calculator sizes your room in under a minute, and we confirm before we quote.
How much does the Fujitsu Lifestyle 5kW cost to run?
Official government test figures for Sydney's climate zone put the Fujitsu Lifestyle 5kW at 344 kWh a year for cooling and 730 kWh for heating. The running cost figures on this page turn that into dollars at the Sydney median electricity rate, refreshed monthly. Your bill depends on your tariff and how much you run it.
Is the Fujitsu Lifestyle 5kW reverse cycle?
Yes. The registered model (ASTG18KMTC) heats and cools, so one system covers Sydney summers and winters. Its official heating figures for this climate zone are shown in the energy section above.
