Fire Rated Roof Vent Intake

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.

Fire rated roof vent intake.

Patent application 11 875 034 filed october 19 2007. Of net free area per linear foot. Caruso george and bill hendricks. The inflow vent is an ideal solution for roofs without soffits or used as a supplemental intake on roofs requiring additional ventilation.

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. We have been using smartvent for years as a great solution for inadequate ventilation on our customer s homes. Patent numbers 6 212 833 6 447 392 issued by the united states patent trademark office. Today o hagin has local and national testing approvals.

Each vent has 16 sq. It shows fire penetrating a frieze block vent with flames entering into what would be the attic. Smartvent also satisfies all ridge vent and exhaust vent requirements. 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.

Common 1 4 screens are ineffective and should be replaced or retrofitted. Ember and fire resistant vent u s. Made with an internal weather filter. Louver openings are sized to minimize insect infiltration and windblown debris.

Is recognized for its industry leading efforts in research development and testing. An ember catching screen blocks dangerous embers during ember attacks long before the fire arrives. 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. Class a fire rated.

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. Smartvent is rated at 9 nfa ft. Vents are vulnerable to wildfires when embers and flames enter into the enclosed attic or crawl spaces and ignite combustible materials in those areas. 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.

This is a photograph from a test conducted in a fire research laboratory. The best ventilation solution for tile roof applications in areas where rain or snow may be a concern. As seen on this old house vulcan vents are designed to be fire and ember safe. Available with and without nails.

Alternatively cover all existing vent openings with 1 8 inch or 1 16 inch wire mesh. Use manufacured and ca approved vents see below to retrofit existing attic soffit basement foundation and gable vents where possible.