How do Vulcan Vents work?

The beauty of Vulcan Vents is the speed in which they close. Time matters when there is fire near and our vents are built to create a barrier against wind-blown embers and flames in the presence of intense heat.

Blocking fire threat before it's too late.

Our vents are designed to protect against flying embers even before mesh closure. Embers often attack a home miles before the fire even comes near, spreading flames faster and wreaking more havoc. Our vents are equipped with a screen to catch embers before they smolder and ignite, an imperative feature to help keep a home intact.

Home safety 
starts with venting.

Vulcan Vents will stop floating embers from entering the home through the:

home vents location graphic

Tested 
and Proven

Our vents officially passed the American Society for Testing and Materials (ASTM) E 2886 which is a test to evaluate the ability of exterior vents that mount vertically or horizontally to resist the entry of embers and flame penetration through the vent.

Fire-rated vents are 
more than necessary, they’re required.

Under Chapter 7A California building code, new homes in the WUI must be equipped with ventilation made with building material that is ready for exterior wildfire exposure.

intumescent coating honeycomb vent

Behind the scenes of a Vulcan Vent.

Behind the scenes of a Vulcan Vent. The core of our fire and ember-resistant vents are manufactured out of corrosion-resistant, high-grade aluminum honeycomb complete with an intumescent coating made by Firefree Coatings. The hexagonal intumescent coating is designed to quickly swell up and close off when exposed to high heat. The expanded material acts as an insulator to heat, fire, and embers.

What makes us different?

Net free vent area (NFVA) in various sizes and up to code, providing airflow and proper ventilation resulting in fewer vents.
Smaller mesh size to catch even the smallest embers.
Intumescent formula coating that expands and closes COMPLETELY to outside fire threat.

Vulcan Vents vs. Standard Vents

Vulcan Vents

Fine mesh screen stops ember entrance while allowing for adequate airflow when fire isn’t near. When exposed to flames, the fire-resistant coating on the inner honeycomb matrix will expand and effectively fill the space between the cells, creating an effective barrier. Built and tested to be an effective defense against ember storms.

Standard Vents

Always open with one layer of protection at most from only the largest of airborne objects. Standard vents are not effective at preventing ember entry into attics and basements, potentially causing encompassing fire. As a result, standard vents are not recommended or permitted in buildings near the Wildland-Urban Interface (WUI).

It's all about response time

This graph shows the time it takes for the wire mesh covering Vulcan Vents to expand, stopping fire from getting into crawl spaces and attic spaces and potentially igniting combustible materials.

The blue line shows the results of a standard vent and the bottom three lines show the results of three different Vulcan Vents.

The intumescent coating begins to expand when exposed to radiant heat starting at 350F, then fully expands at 500F at rate of 70 to 1, effectively sealing off the vent and protecting it from the intrusion of flames.

600500400300200100005101520Attic TemperaturesTime (m)Temperature C