Specifications
Static Roof Vents

HOW TO SPECIFY NON-POWERED ROOF VENTS

View the wide range of colors in which our products are available in our color chart.

According to federal guidelines, homes require 1 square foot of net free area (the total unobstructed area through which air can enter or exhaust a non-powered vent) for every 150 square feet of attic floor space. If balanced between intake and exhaust vents, the requirement is 1 square foot of net free area for every 300 square feet of attic floor space.

NON-POWERED ROOF VENTS

Type	Net Free Area (Sq. In.)	Roof Pitch
Square Metal Roof Vent	50/pc.	3/12 to 8/12
Square Plastic Roof Vent	61/pc.	3/12 to 8/12
Round Galvanized Steel Roof Vent	144/pc.	3/12 to 8/12
Round Plastic Roof Vent	144/pc.	3/12 to 8/12
Slant-Back Metal Roof Vent	50/pc.	3/12 to 12/12
Slant-Back Plastic Roof Vent	61/pc.	3/12 to 12/12
Wind Turbines	112/12" turbine 154/14" turbine	3/12 to 12/12 3/12 to 12/12

MINIMUM NUMBER OF NON-POWERED VENTILATORS NEEDED
(If ventilation is split between soffit and ridge)

Net Free Area Required (Square Inches)
	240	480	720	960	1200	1440
Attic Square Footage							Type of Vent
	500	1000	1500	2000	2500	3000
EXHAUST PRODUCTS
	3	5	8	10	12	15	roof vent (50 sq. in. net free area per piece)
	2	4	6	8	10	12	roof vent (61 sq. in. net free area per piece)
	1	3	4	5	6	7	12" wind turbine
	1	2	3	4	4	5	14" wind turbine
INTAKE PRODUCTS
	5	9	13	18	22	26	16" x 4" undereave
	3	6	9	12	15	18	16" x 6" undereave
	3	5	7	9	11	13	16" x 8" undereave
	2	4	5	7	9	10	8' continuous soffit vent
	2	3	4	6	7	8	10' vented drip edge

Static Vents: Roof Louvers | Wall Louvers | Wind Turbines

Specifications Static Roof Vents

Specifications
Static Roof Vents