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Heat & Smoke Vents

Vent for Heat and Smoke 

Designed to automatically spring open to approximately 90 degrees in the event of a fire.

Heat and smoke vents can save lives by releasing smoke, decreasing the possibility of deadly smoke inhalation to building occupants. The open covers permit firefighters to douse flames directly from the rooftop location.

The covers are activated by the parting of a single UL listed, FM approved 165°F fusible link, and automatically lock in the fully open position. Units can be equipped with electrical links that trigger the cover opening when connected to a remote smoke or fire alarm.

Open Against Snow or Wind 

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

No Over-Travel 

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

No Accidental Opening 

Covers will not open when subjected to a minimum 30 psf uplift pressure. This prevents accidental openings.

Fire Safety 

Complies with the requirements of a Class “A” burning brand (UL 790).

Easy Reset 

Covers latch automatically. Manual release mechanism resets automatically when covers are closed from the roof line.

Thermal Efficiency 

Insulated covers provide a minimum thermal transmittance value of U = 0.093 to reduce heat loss or gain and to prevent condensation.

Weathertight Performance 

Covers are fully gasketed for weathertight performance.The dual covers close unto a fixed channel that permits water to flow off the unit without interfering with the cover operation.

Choice of Materials 

Most Milcor heat and smoke vents are available in three combinations of materials to meet specific design criteria:

  • All Galvanized
  • All Aluminum
  • Aluminum Cover/Galvanized Curb


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