Cleanroom Types as Based on Operational Conditions
as-built Cleanroom Facility
A cleanroom facility that is complete and ready for operation, with all services connected and functional, but without equipment or operating personnel in the facility
as-rest Cleanroom Facility
A cleanroom facility that is complete, with all services functioning and with equipment installed and operable or operating as specified, but without operating personnel in the facility
Operational Cleanroom Facility
A cleanroom facility in normal operation, with all services functioning and with equipment and personnel, if applicable, present and performing their mormal work functions in the facility
Cleanroom Types Based on Air Flow Direction
Mixed Airflow Cleanrooms
A hybrid cleanroom containing both unidirectional and nonunidirectional types of airflow within the same enclosure
Nonunidirectional Airflow Cleanrooms
A cleanroom in which the filtered air entering the room or passing through the work zone is characterized by nonuniform velocity or turbulent flow. Such rooms exhibit nonuniform, random airflow patterns throughout the enclosure
Unidirectional Aiflow Cleanrooms / Laminar airflow Cleanrooms
A Cleanroom in which the filtered air entering the room makes a single pass through the work area in parallel flow pattern, with a minimum of turbulent flow areas. Unidirectional airflow rooms typically have HEPA or ULPA filter coverage of 80% or more of the ceiling (vertical flow) or one wall (horizontal flow)
as-built Cleanroom Facility
A cleanroom facility that is complete and ready for operation, with all services connected and functional, but without equipment or operating personnel in the facility
as-rest Cleanroom Facility
A cleanroom facility that is complete, with all services functioning and with equipment installed and operable or operating as specified, but without operating personnel in the facility
Operational Cleanroom Facility
A cleanroom facility in normal operation, with all services functioning and with equipment and personnel, if applicable, present and performing their mormal work functions in the facility
Cleanroom Types Based on Air Flow Direction
Mixed Airflow Cleanrooms
A hybrid cleanroom containing both unidirectional and nonunidirectional types of airflow within the same enclosure
Nonunidirectional Airflow Cleanrooms
A cleanroom in which the filtered air entering the room or passing through the work zone is characterized by nonuniform velocity or turbulent flow. Such rooms exhibit nonuniform, random airflow patterns throughout the enclosure
Unidirectional Aiflow Cleanrooms / Laminar airflow Cleanrooms
A Cleanroom in which the filtered air entering the room makes a single pass through the work area in parallel flow pattern, with a minimum of turbulent flow areas. Unidirectional airflow rooms typically have HEPA or ULPA filter coverage of 80% or more of the ceiling (vertical flow) or one wall (horizontal flow)
