6.3 kWMHI Bronte WF1 6.3kW Split System
The 6kW MHI Bronte Split (model DXK21ZRA-W) is sized for large living rooms and small open-plan areas. As a guide, it cools a room of up to about 47 to 54 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 is the smallest capacity in the MHI Bronte Split range. If the space is bigger, has high ceilings or strong afternoon sun, step up to the 7.1kW.
Part of the MHI Bronte WF1 Split range, Mitsubishi Heavy Industries's split system line, in 5 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 6.3 kW options, or ask about supply and installation.
About $433 a year at the current Sydney median electricity rate: $162 of cooling plus $271 of heating, from the official GEMS test figures.
The MHI Bronte WF1 6.3kW uses 489 kWh annually for cooling and 819 kWh annually for heating under official GEMS testing conditions for Sydney's climate zone. These figures represent the system's actual energy consumption across a typical year and form the basis for running cost calculations.
The system carries a 3.5-star cooling efficiency rating and 3-star heating efficiency rating under the zoned energy labelling scheme for Sydney. It achieves a rated cooling efficiency of 3.96 AEER and heating efficiency of 4.41 ACOP. The exact running cost depends on your current electricity rate, which is calculated separately based on these verified energy consumption figures.
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 MHI Bronte WF1 Split range| Brand | Mitsubishi Heavy Industries |
|---|---|
| Model | DXK21ZRA-WF1 |
| Series | MHI Bronte WF1 Split |
| System type | Split System |
| Capacity | 6.3 kW |
| Refrigerant | R32 |
| Warranty | 5 year parts & labour |
Other 6.3kW options
All split systems
MHI Ciara 6.3kW
Model DXK21ZTLA-WF. Value range, Compact
Mitsubishi Electric MFZ-KW 6.1kW
Model MFZ-KW60VGK-A1. Floor mounted, Built-in Wi-Fi
Mitsubishi Electric MSZ-LN 6.1kW
Model MSZ-LN60VG. Flagship split, EER up to 5.10