WB Type DSH Automatic Fire Vent

Automatic Fire VentDSH series fire vents are available in a number of standard ULlisted and FM-approved sizes. Features include fully insulated covers and galvanized steel or aluminum construction. By Bilco.

Construction Specifications:
Material-Steel: Cover and frame are 14 gauge G-90 paint bond galvanized steel aluminum: Cover and frame are 11 gauge aluminum
Covers: Breakformed, hollow-metal design with 1" concealed fiberglass insulation, 3" beaded, overlapping flange, fully welded at corners, and internally reinforced for 40 psf (195 kg/m2) live load
Curb: 12" in height with integral capflashing, 1" fiberboard insulation, fully welded at corners, and 3-1/2" mounting flange with 7/16" holes provided for securing frame to the roof deck
Gasket: Extruded EPDM rubber gasket permanently adhered to the covers
Hinges: Heavy-duty pintle hinges with 3/8" Type 316 stainless steel hinge pins
Latch: Positive hold/release mechanism controlled by a single UL-listed 165F (74C) fusible link with a separate latching point for each cover. Designed to hold the covers closed against a 90 psf (438 kg/m2) wind uplift force.
Performance Ratings: UL-listed and FMapproved. Comply with UL 790 Class A (burning brand test).
Finish-Steel: Alkyd base red oxide primer, Aluminum: Mill finish
Hardware-Steel: Engineered composite compression spring tubes. Steel compression springs with electrocoated acrylic finish. All other hardware is zinc plated/chromate sealed. Aluminum: Engineered composite compression spring tubes. Steel compression springs with electrocoated acrylic finish. Type 316 stainless steel hinges. All other hardware is zinc plated/ chromate sealed.


WB Type DSH Auto Fire Vent
S-WB DSH

Fire Vent Diagram


CAD Item # Size W x H Shipping Wt. Lbs.
DSH4848 Steel 48 x 48 367
DSH4872 Steel 48 x 72 455
DSH4890 Steel 48 x 90 544
DSH4896 St Curb-Al Cvr 48 x 96 485