SNOWVENTCO STORM VENTS

Miami Dade TAS 100 tested and approved hurricane vent against wind and rain  is also near perfect in a blizzard.
Type B, 50 sq inch Net Free Area Roof vent with 70 sq inch NFA stainless steel micro pore mesh to completely block driven snow, rain , vermin and other elements even in severe weather conditions.  The stainless steel filter mesh will never rust with non clog porcelain smooth micro pores.... that self clean from moving air and the occasional good rain storms.
The 40% over engineered mesh blocks the weather while allowing the attic to easily breath. 
Patented
Visit us online at https://www.snowventco.com