Clean booth  usually installed in cleanroom environment,which need higher cleanliness workshop  removes pollutants, particles, and contaminants from outside ambient air. Outside air is first circulated to a filter system. The filters (either HEPA or ULPA) then clean and decontaminate this outside air according to their specifications. The filtered air is then forced into the clean booth. Additionally, contaminated air within the cleanroom is forced outside the room by registers, or it is recirculated back into the filters, and the process restarts.The clean booth is flexible and can be extension for existing system, accommodate existing space and HVAC system.