Rectangular PVC Louvered Vent.
Louvered Vents
Not only do louvers bring a decorative aspect to your structure, they also provide ventilation in attic spaces as required by United States Building Codes. The US Building Code states that there needs to be "one (1) square foot of free ventilation for each three hundred (300) square feet of attic floor space, to be divided equally between the upper roof area and under the eaves."