Nonlaminar flow cleanrooms are analyzed in the Handbook of Facilities Planning (1990).
The air flow system is the same as the common air-conditioning system except it uses a HEPA filter and more air changes to reduce the contamination level. This type of clean room is generally employed to maintain Class 1,000 to 10,000, but when it is supplemented by local laminar flow work stations, it can provide a high degree of contamination control for critical operations. The construction cost is economical.
