Air showers are specialized antechambers which personnel must pass through before entering cleanrooms in order to decontaminate. Decontamination is done by clearing off dust and dirt particles from bodies of cleanroom personnel to minimize contamination of equipment or products.
Designs to an air shower unit include single-side shower, double-side shower, three-side shower, and top shower. Air velocity should be in and around 25 m/s through nozzles. HEPA filters are generally used to filter out particles greater than 0.3 > in size from the shower air.
Air showers are considered essential equipment in fields where sterile or dust-free conditions are critical, such as life science and biomedical research, pharmaceutical, parenteral drug, microelectronics, aerospace and some precision manufacturing.
General Specification of Air Shower
| Description | AIR SHOWER |
| Material of construction | M S Powder coated |
| Model | NC AS—01 entry |
| Type | Side Blower |
| Supply Filter | HEPA FILTER Construction H-14 Efficiency : 99.99% DOWN TO 0.3 |
| Pre—Filter | Initial Filter 4 PLY HDPE, efficiency 95% down 10 |
| Motor blower assembly | Electrical motor, 01 no. 2800 RPM, FRP Blower with ‘AL’ impeller 7 ” x 4 ½ ” Dia impeller Double shaft type motor |
| Vibration | 1 to 2 micron |
| Noise level | 75 db when measured from 1 meter |
| Velocity | 30+/-2 m/s |
| Electric supply | 415 V, three phase, 50 Hz |
| Others | 20 W Fluorescent tube, Hinge door with glass window. Electro Magnetic interlocking with EMO. One door will open at a time. Adjustable timer |