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 type roof ventilator.
These can be ridge vents wind turbines or the flat vents your roofer wants to install.
Use hooded gravity roof vents with either nonpowered ventilation or in conjunction with powered exhaust supply or reversible fans.
In order to take advantage of both wind pressure and stack effect gravity ventilators are generally used in conjunction with open doors and windows to ventilate the structure.
Gravity vents are placed on the roof being the highest part of the structure to provide for exhaust of building air.
Gravity intake and relief ventilators for use in non powered applications.
Offers roof mounted gravity vents assimple yet effective options for ventilating your building.
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.
Engineered and certified for both flat roof ventilation and steep slope ventilation the aura gravity ventilator is available for both residential and commercial buildings.
Attic must have 5 sq.