4.2 kWPanasonic RZ 4.2kW Split System
The 4.2 kW Panasonic RZ Split System suits rooms around 27 to 34 square metres as a guide. Sun exposure, ceiling height and insulation move that band, which is why we confirm sizing before we quote.
Part of the Panasonic RZ Split System range, Panasonic'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 4.2 kW options, or ask about supply and installation.
About $292 a year at the current Sydney median electricity rate: $98 of cooling plus $194 of heating, from the official GEMS test figures.
The Panasonic RZ 4.2kW uses 339 kWh per year for cooling and 672 kWh per year for heating under official GEMS testing conditions for Sydney's climate zone. These figures reflect the system's actual energy consumption in typical Sydney conditions and are the basis for your running cost estimate, which varies with current electricity rates.
The system carries a 3.5-star cooling efficiency rating and 2.5-star heating efficiency rating for Sydney. It achieves a rated cooling efficiency (AEER) of 3.53 and heating efficiency (ACOP) of 3.73. The unit uses R32 refrigerant.
Source: Australian GEMS registry · median of 170 Sydney residential tariffs · Refreshed monthly · Last updated September 2026
Specifications
From the manufacturer’s published range data. We confirm the exact configuration when we quote.
About the Panasonic RZ Split System range| Brand | Panasonic |
|---|---|
| Model | CS-RZ42XKR / CU-RZ42XKR |
| Series | Panasonic RZ Split System |
| System type | Split System |
| Capacity | 4.2 kW |
Other 4.2kW options
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Model ASTH14KNCA. Best value, Compact
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Mitsubishi Electric MSZ-EF 4.2kW
Model MSZ-EF42VG. Three colours, Below 21dB