The Hitachi RAI mini cassette air conditioning units have DC Inverter driven compressors and fans. Enhanced inverter performance and system performance are achieved by the addition of a ‘Direct Current’ drive, resulting in up to 10% more efficient than standard 'AC' (Alternating Current) Systems. The indoor unit fits into 60cm x 60cm ceiling module. With it’s the compact design the 60cm x 60cm ceiling unit neatly fits inside a standard ceiling module which minimises the installation work. The user can select between 2-way, 3-way or 4 way operation of auto swing louvers.