Cassette Fan Coil Units
Cassette fan coil units are indoor terminals designed for water-based heating and cooling systems. The main body is concealed above a suspended ceiling, leaving only the air intake and discharge panel visible inside the room. This arrangement preserves usable wall and floor space while distributing conditioned air across the occupied zone. The Midea range includes compact four-way, standard four-way and one-way cassette configurations for different room layouts.
A 2-pipe fan coil uses the same water circuit for seasonal cooling or heating. A 4-pipe unit has separate chilled-water and hot-water circuits, allowing a correctly designed central plant to respond to different temperature requirements in separate building zones. The appropriate arrangement depends on the chiller, heat source, pipe network, valves and control strategy selected for the project.
Compact MKD models suit restricted ceiling voids and standard ceiling grids. MKA four-way units distribute air in several directions and can be specified for offices, shops, restaurants, hotels and other commercial interiors. MKC one-way units serve areas where airflow must follow a more defined direction. Selection should be based on the calculated room load, required airflow, available ceiling space, water conditions and acceptable sound level rather than floor area alone.
Installation quality directly affects performance and service life. The unit must be suspended level, while the condensate pipe requires the correct fall and continuous insulation. Water connections, control valves, electrical wiring and the room controller must correspond to the selected model. Adequate access should remain available for filter cleaning, drain inspection, coil maintenance and electrical servicing after the ceiling is completed.
Other indoor-unit formats can be reviewed in the fan coil systems section. Equipment used in central chilled-water and air-distribution projects is presented under cooling and ventilation systems. Final selection should be confirmed against project cooling and heating calculations, water temperatures and operating requirements.