Products / Smoke Vent

A roof smoke vent whose door opens automatically when heat releases a UL listed fusible link (optional electro-thermal link), offered with an insulated metal cover (SV), an acrylic dome cover for daylighting (SVD), a domed cover with fixed louvered sides (SVDL), and as a double door unit (SVDD). Single-door sizes run from 30 x 30 in. to 48 x 96 in. and double door sizes from 60 x 60 in. to 96 x 96 in. inside dimension. The specification calls for a 14 gauge galvanized steel or 0.125 in. aluminum curb 7-1/2 in. high with 1 in. insulation, chrome vanadium steel torsion springs, a lid lifting arm and limit chain, and cites California State Fire Marshal approval no. 4475-054 (SVD and SVDL also 4350-054 and ICBO 1998).