AstroCel I HEPA filters are used primarily in “cleanrooms” and “clean benches,” areas which require the very highest levels of contamination control. The filter consists of water-proofed, fire-retardant fiberglass media formed into a series of pleats. Corrugated sheets of aluminum separate the pleats to permit maximum usage at minimum resistance. The media is enclosed in and foam bonded to a filter frame made of 3/4" fire retardant particle board. Gasketing is available on the upstream, downstream or both faces.

An economical, non fire retardant model of the AstroCel I with particle board sides is available.