Automatic Acoustical Smoke Vent

Type ACDSV

Standard Features and Benefits

• STC-50, OITC 46, and ISO 140-18 (rain fall - 37.5 db) sound ratings. (Read selecting the proper sound rating for Automatic Smoke Vents)

• Thermolatch® II positive hold/release mechanism ensures reliable vent operation when a fire occurs.
• Automatically releases vent covers upon the melting of a UL-listed 165°F (74°C) fusible link.
• The curb-mounted fusible link housing allows the latch to be quickly and easily reset from the roof level.
• Engineered with powerful gas spring operators to open covers in snow and wind conditions.
• Gas springs have integral dampers to assure the covers open at a controlled rate.
• Fully insulated and gasketed for weather-tightness.
• Constructed with corrosion resistant materials to provide many years of trouble free, dependable service.
• Available in a number of standard UL listed sizes.

Guide Specifications

• Material: Cover is 14 gauge (2 mm) galvannealed steel.
• Covers: Brakeformed, hollow-metal design with 4" (100 mm) mineral wool insulation, 5-3/4" (146 mm) beaded, overlapping flange, fully welded at corners, and internally reinforced for 40 psf (195 kg/m2) live load.
• Curb: 12" (305mm) in height with integral capflashing, 4" (100 mm) fiberboard insulation, fully welded at corners, and 6-7/8" (175mm) mounting flange with 7/16" holes (11mm) provided for securing frame to the roof deck.
• Gasket: Extruded PVC gaskets permanently adhered to the underside of the cover and the top of the curb.
• Hinges: Heavy-duty pintle hinges with 3/8" (9 mm) type 316 stainless steel hinge pins.
• Latch: Positive hold/release mechanism controlled by a single UL-listed 165°F (74°C) fusible link with a separate latching point for each cover. Designed to hold the covers closed against a 90 psf (438kg/m2) wind uplift force. Provided with interior and exterior pull release cables to manually open vent covers.
• Operation: When acoustical smoke vent is released, high performance gas springs open covers against a 10 psf (49kg/m2) snow/wind load and lock covers in the open position. Gas springs have integral dampers to assure a controlled rate of cover opening and have a cyclic durability of 50,000 cycles.
• Performance Ratings: STC-50, OITC 46, and ISO 140-18 (rain fall - 37.5 db) sound ratings. UL-listed.
• Comply with UL 793 and UL 790 Class A (burning brand test).
• Finish: Alkyd base red oxide primer. 
• Hardware: Corrosion-resistant gas springs and hot dip galvanized steel stop cables. All other hardware is zinc plated/chromate sealed.

U.S. Patents  5,927,012  5,960,596  6,347,818

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CA Prop 65 Notice

WARNING : The State of California has deemed that this product can cause cancer, birth defects or other harmful effects. For more information, please visit For more information, Please visit: www.p65warnings.ca.gov/

Automatic Smoke Vents - Protecting Life & Property

Automatic smoke vents aide fire fighting efforts and promote safe building evacuation by removing heat, smoke, and toxic fumes from a burning building. Watch our short video on the theory behind automatic smoke ventilation and learn how to protect your property and its contents.