For a healthy environment, it is Important to provide clean breathing indoor air quality by removing bacteria, virus, and particulates in the air of the room. These can be defined as "A room with control of participate contamination, constructed and used in such a way so as to minimize the introduction, generation & retention of particles inside the room. The temperature, humidity and pressure are capable of being controlled according to necessity." Clean and containment rooms will be individually designed according to their application. These concepts consider the special requirements of industries such as microelectronics, pharmaceuticals, medical devices and biotechnology.