FFH filter boxes are meant to be used in ventilation systems to ensure higher cleanness requirements in supply and exhaust air ducts.
The filter box is equipped with HEPA filter.
FFH filter box meet tightness class D requirements provided that the products are assembled according to instructions.
Tightness of the filter box in the ventilation duct is ensured with E30 connection bars. Tightness of the service hatch is ensured by a rubber sealing and fastening bolts that are used to close the service hatch after replacement of the filters.
Tightness of the filter is ensured by a sealing installed on the HEPA filter by the manufacturer.
This sealing is pressed against the supportive plate by means of tightening screws.
