... floor filter (fiberglass filter), filtering rate > 70%5. Air circulation System- Air-Intake Fan* 1unit, Centrifugal Fan with 4kw motor, 2 ... Air-Exhaust Fan* 1unit, Centrifugal Fan with 4kw motor, one set,air capacity 12500m3/h in total.- Cabinet for the fans* 1 unit ... , and Air Ducts* 3pcs, and Air Damper (electric)* 1unit6. Illumination- Ceiling Lights * 32pcs ...