Fire Rated Roof Vent Intake

It shows fire penetrating a frieze block vent with flames entering into what would be the attic.

Fire rated roof vent intake.

As seen on this old house vulcan vents are designed to be fire and ember safe. In addition to all the design construction features and color choices of the o hagin standard line this patent pending attic vent features an interior stainless steel diffuser that breaks down wind driven rain and snow before it can enter the attic space. In general you want 2x as much intake venting at the eaves as outlet at the ridge but keep in mind that if you use a mesh type ridge vent the ridge opening is obstructed by the mesh and the air flow will may be insufficient so you can t just measure the sq in. The best ventilation solution for tile roof applications in areas where rain or snow may be a concern.

As part of a ventsure balanced air ventilation system of intake and exhaust the ventsure inflow vent helps reduce heat and moisture buildup that can lead to ice damming and roof deterioration. Louver openings are sized to minimize insect infiltration and windblown debris. Patent application 11 875 034 filed october 19 2007. Accommodates roof pitches from 3 12 to 16 12.

The inflow vent is an ideal solution for roofs without soffits or used as a supplemental intake on roofs requiring additional ventilation. Available with and without nails. Of net free area per linear foot. Common 1 4 screens are ineffective and should be replaced or retrofitted.

We have been using smartvent for years as a great solution for inadequate ventilation on our customer s homes. Class a fire rated. Patent numbers 6 212 833 6 447 392 issued by the united states patent trademark office. Each vent has 16 sq.

Smartvent is rated at 9 nfa ft. This is a photograph from a test conducted in a fire research laboratory. Caruso george and bill hendricks. 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.

Alternatively cover all existing vent openings with 1 8 inch or 1 16 inch wire mesh. From its founding roots as a roofing company over 40 years ago o hagin has grown into a nationally recognized designer and producer of top quality state of the art attic ventilation solutions. Is recognized for its industry leading efforts in research development and testing. Ember and fire resistant vent u s.

Of vent opening you have to also adjust the calculation for the degree to which the vent opening is obstructed by mesh screening and any other airflow obstructions such as under sized cuts into the roof deck. Today o hagin has local and national testing approvals. Wind driven rain resistant to 110 mph. An ember catching screen blocks dangerous embers during ember attacks long before the fire arrives.

Vents are vulnerable to wildfires when embers and flames enter into the enclosed attic or crawl spaces and ignite combustible materials in those areas. An air intake or exhaust vent for an external roof or wall of a building.