The RCIM 4 way cassette type indoor unit is extremely compact and fits into a standard 600x600mm ceiling unit. Also with a height of only 295mm and a weight of 17Kg it can be easily installed in the reduced space of a false ceiling. By utilising the motor speed up tappings the model can be adapted for use in high ceiling installations of up to 3.5m. The unit is easily maintained, the electrical box can be accessed from inside the grill and it is possible to adjust the body height without removing the panel.