Gravity Roof Vent

These ventilators provide natural ventilation and are used for intake and relief applications.

Gravity roof vent. Gravity ventilation gravity ventilators are used to equalize a building s positive or negative pressure created by other fans in the system. The draw bolt collar available in sizes up to 12 offers secure fit yet is easily removed when needed. The gbv features watertight construction and a low silhouette while offering positive draft for good air flow. Commercial gravity roof exhaust aura ventilators function much like their residential roof vent version.

Brock offers two styles of gravity roof ventilators to help provide free air movement into the bin. Designed for maximum airflow passage and weathertight integrity bgh comes in either intake or relief models with aluminum or galvanized finishes. Gravity vents are placed on the roof being the highest part of the structure to provide for exhaust of building air. All gravity vents have a built in screen for bugs and are available in small 4 inch sizes up to 48 inch 4 foot round connections for industrial barn or warehouse venting.

Gravity vents are often called globe vents or barn vents. Engineered and certified for both flat roof ventilation and steep slope ventilation the aura gravity ventilator is available for both residential and commercial buildings. The strong weathertight hood is constructed of interlocking arched galvanized steel panels. These hooded gravity roof ventilators are designed for nonpowered ventilation or can be used in conjunction with powered exhaust supply or reversible fans.

The brock elbow style roof vent offers 190 square inches 1225 square centimeters of ventilation opening. Bgh gravity ventilators offer a modern low silhouette design that blend with roof lines and other equipment. Round mushroom style roof vent. Windows and doors at lower elevations provide the intake portals of the gravity ventilation system.

The globe roof vent gbv is an economical gravity ventilator for use on residential commercial and industrial applications. 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. Both function like roof turbines more static vents with or without curb mount flanges. Twin city fan offers both spun aluminum and hooded ventilators featuring a low silhouette for low roof lines.

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