TYPE I

The AHU consists of a double skin modular construction. The System is of a Recirculation type connected to the area through the ducts. The Air Handling Unit will suck 10 — 20 % fresh air from atmosphere & 80 - 90% of return air from rooms and mix with each other. Then the air passes through 10 Micron filters and cooling coil and after that air will be sucked by blower. The air then passes through 5 Micron and from there passes through 0.3 micron filter. The air then enters into the individual rooms with the help of supply air duct The Return air passes through return terminal and then the air sucks the air through Supply Air Handling Unit with the help of return air duct.

TYPE II

The AHU consists of a single skin modular construction. The System of Once through and connected to the areas through ducts. The Air Handling Unit will suck 100% fresh air from atmosphere and the air passes through 10-micron filter, cooling coil after motor & blower. The blower blows air through 5 Micron filters, 0.3 Micron filters after supply air terminal and then air enters into the individual rooms with the help of supply air duct