Clean air systems provides air showers model cass 900 and model cass 1800. These are extensively used in drugs and pharmaceutical industries, food processing industries, biotechnology/tissue culture, medical and educational institution, hospitals, electronic industries and space applications centres, etc. Clean air systems has a full set of in-house testing facility such as velocity testing, vibration testing, sound level testing, light intensity testing, etc. Every hepa filter used in the equipment is tested for its efficiency and particle retention at manufacturing stage itself. Cabinet is made by waterproof commercial ply in wooden structure. External surface is covered with industrial laminated sheets and air pleanum surface coated with synthetic rubber paint over suitable primer base. The platform is covered with aluminium-grated sheet or pvc mat flooring and doors are made of 6 mm clear glass in aluminium pipe with automatic door closures and manual locks. Prefilter made from synthetic polyester non-woven fibre, particle retention 10 to 15 micron. Efficiency - 90%, pressures drop 6 mm wg. Hepa filters are made of mocro clean, glass fiber paper of imported origin, particle retention above 0.5 micron and pressure drop 23 mm wg. Controls: themotor is controlled by dol starter, and doors by electromagnetic interlocking. Overload protection is maintained by thermal relay. Electronic timers control shower duration and emergency cut-off by mushroom head push button.