4.2 kWMitsubishi Electric MSZ-AP 4.2kW Split System
The 4.2kW Mitsubishi Electric MSZ-AP Split (model MSZ-AP42VGKD2) 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. It sits in the lower half of the Mitsubishi Electric MSZ-AP Split range. If the space is bigger, has high ceilings or strong afternoon sun, step up to the 5kW.
Part of the Mitsubishi Electric MSZ-AP Split range, Mitsubishi Electric'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 $329 a year at the current Sydney median electricity rate: $105 of cooling plus $224 of heating, from the official GEMS test figures.
The Mitsubishi Electric MSZ-AP 4.2kW uses 318 kWh annually for cooling and 677 kWh annually for heating, based on official government testing in Sydney's climate zone. These figures form the basis of your running cost estimate when combined with your local electricity rate. The system achieves a 4-star cooling efficiency rating and a 2.5-star heating rating under the zoned labelling system for Sydney.
The unit has a rated cooling efficiency (AEER) of 3.52 and a heating efficiency (ACOP) of 3.77, meaning it delivers that many kilowatts of heating or cooling output for each kilowatt of electrical energy consumed. It uses R32 refrigerant. Your actual energy consumption will depend on how often and how intensively you run the system throughout the year.
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-AP Split range| Brand | Mitsubishi Electric |
|---|---|
| Model | MSZ-AP42VGKD2 |
| Series | Mitsubishi Electric MSZ-AP Split |
| System type | Split System |
| Capacity | 4.2 kW |
| Refrigerant | R32 |
| Outdoor units | MUZ-AP25 to MUZ-AP71 VGD2 |
| Warranty | 5 year parts & labour |
