Shrink-Out Smoke Vents

Standard Shrink-Out Smoke Vents (PSO/PSOS)
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. These units are generally used when buildings have no sprinkler system or they employ a standard sprinkler system designed to operate at 165 degrees.

ESFR Rated Shrink-Out Smoke Vents (PSOFR/PSOSFR)
Wasco’s “FR” Pyrodome® Shrink-Out Smoke Vents are gravity operated acrylic double domes designed to automatically shrink and fall out in the event of a fire. These units are equipped with a fusible link activated release mechanism which 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.

Fusible Link for Controlled Venting (PSO-FR, PSOS-FR):

  • Option for Our PSO Unit
  • Incorporates a Fusible Link for Specific Control of Venting
  • Allows Unit to Be Used with ESFR (Early Suppression Fast Response) Sprinkler Systems
  • UL Tested and Approved
  • Less Expensive Alternative to Mechanical Venting
  • Available with 360° or 500° UL listed fusible links

Safety screens recommended.

  • ESFR Rated Shrink-Out Smoke Vent
  • Standard Shrink-Out Smoke Vent
  • Safety Considerations

Standard Sizes

Model Curb Mount (PSOSFR)
O.D. of Curb
Deck Mount* (PSOFR)
Rough Opening
PSOSFR/PSOFR–5555 51″ x 51″ 48″ x 48″
PSOSFR/PSOFR–5566 51″ x 63″ 48″ x 60″
PSOSFR/PSOFR–5578 51″ x 75″ 48″ x 72″
PSOSFR/PSOFR–5596 51″ x 93″ 48″ x 90″
PSOSFR/PSOFR–55102 51″ x 99″ 48″ x 96″
PSOSFR/PSOFR–6678 63″ x 75″ 60″ X 72″
PSOSFR/PSOFR–6696 63″ x 93″ 60″ X 90″
PSOSFR/PSOFR–66102 63″ x 99″ 60″ X 96″

 *Available in 4″, 9″ or 12″ high curbs.

Glazing Options

Outer:

  • Clear
  • #2412 Bronze

Inner:

  • Clear
  • #2447 White

Finish Colors

  • Mill (Standard Finish)
  • Anodized – Clear, Bronze (Dark, Medium or Light)
  • Kynar (Various colors)
  • Baked Enamel (Various colors)

Standard Sizes

Model Curb Mount (PSOS)
O.D. of Curb
Deck Mount* (PSO)
Rough Opening
PSOS/PSO–5555 51″ x 51″ 48″ x 48″
PSOS/PSO–5566 51″ x 63″ 48″ x 60″
PSOS/PSO–5578 51″ x 75″ 48″ x 72″
PSOS/PSO–5596 51″ x 93″ 48″ x 90″
PSOS/PSO–55102 51″ x 99″ 48″ x 96″
PSOS/PSO–6678 63″ x 75″ 60″ X 72″
PSOS/PSO–6696 63″ x 93″ 60″ X 90″
PSOS/PSO–66102 63″ x 99″ 60″ X 96″

 *Available in 4″, 9″ or 12″ high curbs.

Glazing Options

Outer:

  • Clear
  • #2412 Bronze

Inner:

  • Clear
  • #2447 White

Finish Colors

  • Mill (Standard Finish)
  • Anodized – Clear, Bronze (Dark, Medium or Light)
  • Kynar (Various colors)
  • Baked Enamel (Various colors)

Safety Considerations

Skylights pose an inherent risk of injury or death from fall throughs, and the safety of others is of the utmost importance to VELUX.  VELUX recommends that the customer, building owner or manager use additional protection with the skylight such as an exterior or interior safety cage, to enhance long-term safety.  The building owner or manager is responsible for providing fall protection around the skylight in accordance with OSHA regulations.  VELUX also recommends that the building owner or manager restrict roof access only to personnel who have been cautioned as to the location of the skylights, and warned not to sit, step or walk on the skylights.