2.5 kWMitsubishi Electric SEZ-M 2.5kW Bulkhead / Slim Duct
The smallest SEZ bulkhead at 2.5 kW rated cooling, sized for bedrooms of up to about 18 to 21 square metres where silence matters more than anything. 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.
Part of the Mitsubishi Electric SEZ-M Bulkhead range, Mitsubishi Electric's bulkhead / slim duct 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 2.5 kW options, or ask about supply and installation.
About $205 a year at the current Sydney median electricity rate: $75 of cooling plus $130 of heating, from the official GEMS test figures.
The Mitsubishi Electric SEZ-M 2.5kW uses 226 kWh annually for cooling and 392 kWh for heating under official GEMS testing in Sydney's climate zone. These figures reflect your typical yearly energy consumption for the system operating under standard conditions. The unit carries 2.5-star energy ratings for both cooling and heating, indicating mid-range efficiency for its class.
Efficiency is measured by AEER (cooling) at 4.05 and ACOP (heating) at 3.91. The system uses R32 refrigerant. Your actual running costs depend on your usage patterns and current Sydney electricity rates; the estimated annual cost based on official energy figures is calculated separately on this page.
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 SEZ-M Bulkhead range| Brand | Mitsubishi Electric |
|---|---|
| Model | SEZ-M25DA3 |
| Series | Mitsubishi Electric SEZ-M Bulkhead |
| System type | Bulkhead / Slim Duct |
| Capacity | 2.5 kW |
| Refrigerant | R32 |
| Outdoor units | SUZ-M VAD2 series |
| Power | 230V single phase |
