Fire Rated Attic Vents

Under eave soffit vents important airflow notes.

Fire rated attic vents.

When a wildfire nears and the vent reaches the critical temperature the intumescent coating on the matrix structure expands creating an insulating barrier from fire and embers. Shipping leadtime 4 6 business days 93 00 sale 71 95. O hagin universal direct deck attic vents this attic vent provides maximum net free ventilation area nfva and is designed for mop in or dry in applications using tile shingles slate or shake. When used in conjunction with lower soffit or eave vents rapid cooling and venting of the attic can take place.

For flush mount over wood etc. An ember catching screen blocks dangerous embers during ember attacks long before the fire arrives. The vulcan vents are the only fire resistant vents that meet both the wildland urban interface wui and the one 1 hour fire test standards for the exterior of buildings all while providing the proper amount of ventilation to attic and crawl spaces in building structures. Used in outer wall gable area.

The core of our fire and ember safe vents are manufactured out of hi grade aluminum honeycomb and coated with an intumescent fire proof coating. Vulcan 14 wide x 18 inch high fire stopping vent with flat front flange face. The conmpany s soffit and eaves vents prohibit flame intrusion through a structure s ventilation system. 81 sqin net free venting area.

14 x 18 inch flat front fire stop gable vent. This is a photograph from a test conducted in a fire research laboratory. It shows fire penetrating a frieze block vent with flames entering into what would be the attic. Ember entry through vents can result in ignition of combustible materials in the attic and result in a building burning from the inside out.

The importance of ember and flame entry into vents during wildfires has resulted in the development of commercially available vents designed to resist the intrusion of embers and flame and recomendations for new or retrofit vents to protect existing openings. Vents are vulnerable to wildfires when embers and flames enter into the enclosed attic or crawl spaces and ignite combustible materials in those areas. Flame ember resistant vents naturally provide less airflow than regular unprotected vents and brandguard vent airflow ratings nfva are approximately 30 that of the same size standard 1 4 screened vent and are listed within each products description. Approaching fire generates heat whichtriggers the vulcan vent to close.

Quick reference as well as more pics and info for gable vents. These patented attic vents are accepted for use by many local fire officials for installation in wildland urban interface wui zones. As seen on this old house vulcan vents are designed to be fire and ember safe. The intumescent coating is designed to quickly swell up and close off when exposed to high heat.