Smoke Vents

Wasco Shrink-Outs

Wasco Shrink-Outs

Engineered to perform perfectly when needed.

Wasco’s Pyrodome shrink-out smoke vents are gravity-operated acrylic double domes designed to automatically shrink and fall out in the event of a fire.

  • Technical Drawings 2D
  • Technical Specifications

Shrink-Out Smoke Vent Types


  • Standard Shrink-Out Smoke Vents (PSO/PSOS)

    These units are generally used when buildings have no sprinkler system or they employ a standard sprinkler system designed to operate at 165 degrees.


  • ESF-Rated Shrink-Out Smoke Vents (PSOFR/PSOSFR)

    Equipped with a fusible link-activated release mechanism that will ensure the unit does not activate prior to reaching the fusible link temperature, these units are designed for use with an ESFR (Early Suppression, Fast Response) sprinkler system.