Gravity Flow Roof Vents

Ul listed this gravity roof vent is rated to withstand wind pressures of over 50 psf which is equivalent to wind speeds exceeding 200 mph.

Gravity flow roof vents.

Choose one of the following products to meet the recommended exhaust nfva of 528 square inches. Four vents each with 36. They are typically easier to install and won t detract from the appearance of your roof. Shop for a gravity roof vent from grainger in either hooded or low profile design.

Low profile gravity roof vents feature corrosion resistant weather resistant rigid aluminum construction and include integral bird screens. Brock offers two styles of gravity roof ventilators to help provide free air movement into the bin. Venting efficiency is increased in direct proportion to he number of vents used. The gravity intake and relief ventilators are non powered do not have a fan and work on pressure differential between the inside and outside of the building.

Gravity air vents 144 square inches 930 cm of free venting area is required to vent 300 square feet of roof area 1 300. Gravity vents are placed on the roof being the highest part of the structure to provide for exhaust of building air. Ventsure 4 foot strip heat moisture ridge vent with weather protector moisture barrier. When installed as part of a properly balanced when installed as part of a properly balanced attic ventilation system gaf cobra exhaust vent is a shingle over exhaust vent installed at the roof ridge that helps exhaust excess heat and moisture from your attic.

A built in curb cap offers prepunched holes to help provide for easy attachment to the roof curb. 27 lineal feet required. Engineered and certified for both flat roof ventilation and steep slope ventilation the aura gravity ventilator is available for both residential and commercial buildings. Use with mechanical systems.

Commercial gravity roof exhaust aura ventilators function much like their residential roof vent version. A minimum of two vents are required to vent any individual roof area. Round mushroom style roof vent. It comes on an easy to install flexible mesh roll and is hand nailable with no complicated fitting wrapping nail gun adapters connectors or end plugs needed.

Ventsure 4 foot strip heat moisture ridge vent. The brock elbow style roof vent offers 190 square inches 1225 square centimeters of ventilation opening. Gravity ventilators gravity intake and relief ventilators for use in non powered applications. Both function like roof turbines more static vents with or without curb mount flanges.

They both effectively remove radiant heat from the attic in the summer and water vapor from the attic in the winter.