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Round Combination Fire Smoke Dampers

UL 555 1½ hour rating, UL 555S Classified

Round combination fire smoke dampers perform the function of both a fire damper and a smoke damper. These are UL 555 classified with a fire resistance of 1½ hours and UL 555S with a leakage class of I or II.

FSDR-511

FSDR-511

Galvanized steel construction having a UL 555S class I rating with pressure to 4 in. wg, velocity to 3000 fpm and temperature to 350°F.

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https://catalog-api.greenheck.com/api/product/en-us/588
FSDR-512

FSDR-512

UL 555S class II rating having galvanized steel construction with pressure to 4 in. wg, velocity to 3000 fpm and temperature to 350°F.

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https://catalog-api.greenheck.com/api/product/en-us/142
SEFSDR-511

SEFSDR-511

Comes standard with 316 stainless steel construction, UL 555S class I rating with pressure to 4 in. wg, velocity to 3000 fpm and temperature to 350°F.

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https://catalog-api.greenheck.com/api/product/en-us/586
SSFSDR-511

SSFSDR-511

Has 304 stainless steel construction, UL 555S class I rating with pressure to 4 in. wg, velocity to 3000 fpm and temperature to 350°F.

VIEW SSFSDR-511
https://catalog-api.greenheck.com/api/product/en-us/595