Aura Solar Fan PVC Vent Cap, a 4" diameter exhaust vent with an adapter to fit over a 4" PVC Pipe

Aura Solar Fan PVC Vent Cap, 4 inch diameter exhaust vent with an adapter to fit over a 4 inch PVC Pipe The Aura Solar Fan PVC Vent Cap, model ASF-04-PVC, is the ideal solar fan for actively ventilating your PVC Pipe while preventing wind driven rain or snow from entering the pipe. The louver design prevents birds and insects from entering the pipe. The louver design also draws air passively from outdoor wind. The Solar Fan is activated by direct sunlight to move air. The product is commonly used for exhausting Methane/Gasoline.