4" One-way Insulated Breather

• 11" high with 12.5" wide deck flange
• 5" I.D. to aluminum wall with .8" insulation thickness
• 3.5" I.D. between insulated walls
• Vented 7" wide cap with integral bug screen
• Made from premium gauge spun aluminum
• Secured vandal proof cap prevents rain or snow entry
• Reduces moisture and trapper air within roofing system to prolong roof life
• ¾" thickness polyurethane foam insulated walls
• One-way roof vent with an internal flexible one-way diaphragm

Placement depends on the venting area of the breather. With a 3.5" (89 mm) throat opening it is recommended that one breather be installed every 1,000 square feet (929 square metres) of roof area.