Pre-filters for filtering 10 micron and larger particles are installed in the AHU Before the blower and then 5 micron filters also installed in the AHU before the blower. The blower draws 10% of its capacity as fresh air from the atmosphere whereas rest of the air is re-circulated from the Clean Rooms. After 10 micron & 5 micron filtration, this air is discharged to the rooms through the HEPA. HEPA are installed at the top of the clean room panels. HEPA air gets distributed in the room. After filling the room, this air is taken back to the AHU through Return Air ducts. Return air is picked up from the Return air duct through powder coated grilles.
The system is having double skin floor mounted Air Handling Unit. The AHU is having inner skin is of 0.6 mm Plain G.I. and outer skin is of 0.6 mm Powder coated G.I/PPGI. and insulated with Polyurethane.
The system is having double skin floor mounted draw through air handling unit, and comprises of the following sections:
The system is designed to supply Clean Air of required quantity and air changes to the rooms identified in Clean Room. The Diffuser at the inlets to the Classified Area Rooms are connected by GI ducting.