DIV 23 · HVACDAMPERSCUT SHEET INDEXED

Greenheckofsd-311 out of wall combination fire smoke damperofsd-311

Greenheck Combination Fire Smoke Damper (Fire and Smoke Dampers). Model OFSD-311. UL555 1.5 Hour Fire Resistance Rating; UL555S Leakage Class I; Maximum Velocity 4,000 fpm (20.3 m/s); Maximum Differential Pressure 8 in. wg (2 kPa). material: Galvanized Steel Frame, Galvanized Steel Airfoil Blades

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Greenheck ofsd-311 cut sheet — first page
Official manufacturer data sheetOpen PDF ↗
Manufacturer
Greenheck
Catalog no.
ofsd-311
Product type
Dampers
MasterFormat
23
Cut sheet
PDF · manufacturer current

Product details

Catalog numberofsd-311
DescriptionGreenheck Combination Fire Smoke Damper (Fire and Smoke Dampers). Model OFSD-311. UL555 1.5 Hour Fire Resistance Rating; UL555S Leakage Class I; Maximum Velocity 4,000 fpm (20.3 m/s); Maximum Differential Pressure 8 in. wg (2 kPa). material: Galvanized Steel Frame, Galvanized Steel Airfoil Blades
Connection size8x8 in. to 36x36 in. (203x203 mm to 914x914 mm)
End connectionOut of Wall
Pressure RatingUp to 8 in. wg (2 kPa)
Flow RateUp to 4,000 fpm (20.3 m/s)
FinishGalvanized.
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