4.2 kWMitsubishi Electric MSZ-EF 4.2kW Split System
The 4.2kW Mitsubishi Electric MSZ-EF Designer Split (model MSZ-EF42VG) is sized for living rooms and master suites. As a guide, it cools a room of up to about 30 to 36 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. If the space is bigger, has high ceilings or strong afternoon sun, step up to the 5kW.
Part of the Mitsubishi Electric MSZ-EF Designer Split range, Mitsubishi Electric's split system line, in 4 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 $370 a year at the current Sydney median electricity rate: $130 of cooling plus $240 of heating, from the official GEMS test figures.
The Mitsubishi Electric MSZ-EF 4.2kW uses 391 kWh annually for cooling and 723 kWh for heating under GEMS test conditions for Sydney's climate zone. These official figures reflect typical seasonal operation and let you calculate running costs using your current electricity rate. The system carries a 3-star cooling efficiency rating and 2.5-star heating rating for Sydney.
Cooling efficiency is rated at 3.49 AEER, while heating reaches 3.70 ACOP. The unit uses R32 refrigerant. Your actual energy consumption will vary depending on how often you run the system, the temperatures you set, and your home's insulation and orientation.
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 Mitsubishi Electric MSZ-EF Designer Split range| Brand | Mitsubishi Electric |
|---|---|
| Model | MSZ-EF42VG |
| Series | Mitsubishi Electric MSZ-EF Designer Split |
| System type | Split System |
| Capacity | 4.2 kW |
| Refrigerant | R32 |
| Warranty | 5 year parts & labour |
