Milcor UL-SEE automatically operating heat and smoke vents are listed by Underwriters Laboratories, Inc. and Factory Mutual Research Corporation. Sizes are as indicated on page 17.

Welded 13-1/2" height, 16-gauge galvanized steel (UL-SEE), or .090 aluminum (UL-SEEA) curb complete with 3-1/2" pre-drilled mounting flanges and same gauge counterflashing, and 1" thick exterior insulation.

Damage resistant, light admitting, polycarbonate outer dome with 1/8" polycarbonate inner dome, surrounded by an extruded aluminum frame. Consult Milcor for tint options that are available.

• Covers automatically spring open to approximately 90 degrees in the event of fire, actuated by the parting of a single UL-listed 165°F fusible link, and automatically lock fully open.

• Covers are of double-leaf construction, with each leaf equipped with sufficient torsion spring operators to open against a 10 psf snow or wind load.

• Units are equipped with hydraulic shock absorbers to control cover opening speed and prevent over-travel.

• Covers will not open when subjected to uplift pressure up to 30 psf.

• Vent design allows covers to be released manually from inside or outside without disturbing the fusible link assembly.

• Covers latch automatically and manual release mechanism resets automatically by closing covers.