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.
Fire resistant door vents.
Wherever ventilation is needed through a fire resisting wall or where ductwork runs through that wall an intumescent fire damper should be fitted at that point to maintain fire compartmentation.
Eaves and soffits should be protected with ignition resistant or non combustible materials.
Vents are vulnerable to wildfires when embers and flames enter into the enclosed attic or crawl spaces and ignite combustible materials in those areas.
Select fire resistant shrubs such as hedging roses bush.
Cover all vent openings with 1 16 inch to 1 8 inch metal mesh.
An ember catching screen blocks dangerous embers during ember attacks long before the fire arrives.
Dryer vent grill bird guards inserts stop birds nesting in dryer vents and bathroom exhaust vents 3 inch to 8 inch 2 pack 4 6 out of 5 stars 227 8 99 8.
As seen on this old house vulcan vents are designed to be fire and ember safe.
It shows fire penetrating a frieze block vent with flames entering into what would be the attic.
Do not use fiberglass or plastic mesh because they can melt and burn.
Fire rated door vent.
By the tone of your question you seem to realize that a variety of smoke and heat dampers are available.
Shut all windows and doors leaving them unlocked.
Some require electrical wiring controlled by an alarm system and some use a heat activated mechanism only.
These fire resistant air transfer grilles are developed to allow the free circulation of air at room temperature through construction elements walls doors etc while at the same time offering effective protection against flames smoke and gases in case of fire.
This is a photograph from a test conducted in a fire research laboratory.
We offer a range of intumescent grilles and dampers with an added smoke control shutter.
Protect vents in eaves or cornices with baffles to block embers mesh is not enough.
Seal attic and ground vents with pre cut plywood or commercial seals.