Panasonic

Panasonic Z Series 2.5kW Split System

Model CS-Z25AKRW

The 2.5kW Panasonic Z Series (model CS-Z25AKRW) is sized for standard bedrooms and small home offices. As a guide, it cools a room of up to about 18 to 21 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. Like the rest of the Z Series it runs nanoe X air purification around the clock. It is the smallest capacity in the Z Series range. If the space is bigger, has high ceilings or strong afternoon sun, step up to the 3.5kW.

Part of the Panasonic Z Series Deluxe Split range, Panasonic's split system line, in 8 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 2.5 kW options, see every 2.5kW split system ranked by running cost, or ask about supply and installation.

All Panasonic Z Series Deluxe Split sizes
Supply & install pricing
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Energy efficiencyRegistered: CU-Z25AKR / CS-Z25AKRW
4 starsCooling ratingSydney climate zone
3 starsHeating ratingSydney climate zone
180 kWhCooling energy / yearabout $60 at the Sydney median rate
355 kWhHeating energy / yearabout $118 at the Sydney median rate
4.25AEERACOP 4.56
What it costs to run

About $178 a year at the current Sydney median electricity rate: $60 of cooling plus $118 of heating, from the official GEMS test figures.

The Panasonic Z Series 2.5kW uses 180 kWh per year for cooling and 355 kWh per year for heating under standard test conditions for Sydney's climate zone. These figures come from official GEMS registration data and appear on the energy label. The system carries a 4-star cooling rating and 3-star heating rating for Sydney.

The unit has a rated cooling efficiency (AEER) of 4.25 and heating efficiency (ACOP) of 4.56. It uses R32 refrigerant. Your actual running cost will depend on how often you run the system and your local electricity rate.

Source: Australian GEMS registry · median of 170 Sydney residential tariffs, including GST · Refreshed monthly · Last updated October 2026

The details

Specifications

From the manufacturer’s published range data. We confirm the exact configuration when we quote.

About the Panasonic Z Series Deluxe Split range
Documentation
BrandPanasonic
ModelCS-Z25AKRW
SeriesPanasonic Z Series Deluxe Split
System typeSplit System
Capacity2.5 kW
RefrigerantR32
Warranty5 year parts & labour