Product Bulletin: F/S-AF-I & II

NEW 4000 FPM and 6” S.P.

We're pleased to announce that United Enertech has passed UL555S testing on our F/S-AF combination fire/smoke damper at higher velocity and static pressure.

You now may order the F/S-AF-I (Class I) or F/S-AF-II (Class II) combination fire/smoke damper with a velocity rating as high as 4000 FPM and up to 6” w.g. and 250°F ratings.

Maximum Size

As we continue to advance our UL products and listings, the current maximum size is 36” wide x 36” high.

OMS Updates

The new options for higher velocity and static pressures will soon be available in our new OMS system.

Watch for updates on when multiple section assemblies will be available.

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July 29, 2025