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LENGE Fan Filter Unit
LENGE Fan Filter Unit

LENGE Fan Filter Unit

LENGE Fan Filter Units (FFU) are ceiling module diffusers consisting of HEPA filter, fan, and control system.


LENGE Fan Filter Units (FFU) are ceiling module diffusers consisting of HEPA-filter, fan and control system.

iso ffu

The module is designed to provide unidirectional vertical airflow of filtered, clean air over a cleanroom space by removing harmful airborne particles from recirculating air. FFU creates a positive room pressure that reduces the contamination risk from potential ceiling bypasses.

FFU models will have three stickers located on the back of the plenum. For ease of troubleshooting assistance, replacement parts, and general factory assistance, it is recommended that the order number and model line string be used as reference. This information can be found on the Factory Label.

LENGE Fan Filter Unit Features:

  • HEPA (High-Efficiency Particulate Air) filters are rated 99.99% efficient at removing particles ≥ 0.3 microns.

  • Painted white, expanded metal face screen.

  • Low sound, low watts, low profile, and low operating costs.

  • Snap-in pre-filter allows for easy replacement and maintenance (must be removed when ducting directly to the unit).

  • Custom sizes and configurations available.

parameters ffu

Standard size and parameters

Note: specifications listed in the below table are only for customers' reference. It may be designed and manufactured according to customers' URS. H14 HEPA filter is 90mm thick and the U15 ULPA filter is 70mm thick in the table.

FFU technical drawing 

ffu drawing

VCR - Vietnam Cleanroom Equipment is the exclusive agent of Lenge company in Viet Nam. If you interested in the Lenge products, feel free to contact us.