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  FEATURES & BENEFITS | Explosion-Proof Fan/Filter Units
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Pre-Filter Grounding Clip
A grounding wire connects the body of the FFU to a metal wireframe embedded in the pre-filter.
Non-Sparking, Direct-Drive Motor
Explosion-proof motors use a non-sparking polypropylene fan and cast-iron brackets attached to the heavy duty rolled steel frame.
Filter Screen Grounding Clip
Another grounding wire clips to the mesh screen that protects the face of the HEPA filter.

Explosion-Proof Outlet Box
The reinforced outlet box is built to withstand and contain an explosive reaction within the conduit system.

Sealed Wiring Conduit
All FFU wiring is sealed within steel conduit that is joined together by UL-listed explosion-proof fittings.