Blowing Filter Unit is a type of air filtering equipment. It is used to supply purified air to cleanrooms or microenvironments by filtering out harmful airborne particles from the recirculating air. The units are installed within the system’s ceiling or floor grid. Large cleanrooms require a proportionally large number of FFUs, which in some cases may range from several hundred to several thousand. Units often contain their own pre-filter, HEPA filter, and internally ontrollable fan air distribution Blowing Filter Unit is a kind of unit to filter laminar air and supply clean air. It can be installed inside the system’s ceiling or floor grid. It is widely used in Clean rooms, pharmacies, pharmaceutical manufacturing facilities and laboratories and so on.