Disposable ceiling fan unit provides optimized filtering prerformance and is connected with the airstream pipe. It fits class 100000 to 10 laminar or non-laminar cleanrooms, It features leakfree design precluding dirty air bypass, and it meets the needs of critical requiremnets of air quality in cleanroom. It gets thin configuration, light weight, and diposable design, Its applications are in operating table in hospitals, labs, pharmaceutical manufacturing, electronics, film&optical quipments and food processing etc.