Specialty Ridge Vents. Find the right product. It's a breeze!
All FilterVent specialty style vents offer the same features as Multi-Pitch FilterVent, including an external baffle and our internal weather filter -- the keys to delivering exceptional performance.
Specialty vents provide 9 square inches of net free area per linear foot and are available in a variety of colors.
Can be installed at roof/wall junction to provide efficient ventilation. Includes four pieces of Supplemental Flashing
hen installed properly, all Air Vent products mentioned here comply with the net free area requirements of nationally recognized model codes, including those written by the International Code Council. In addition, the vents have product evalutation approvals from Dade County, Florida, ICC and TDI.
Please call 1-800-AIR-VENT to obtain code body information for a particular Air Vent product.
Here's an overview of the specifications for Air Vent's complete line of ridge ventilation products.
View the wide range of colors in which our products are available in our pdf color chart (12 KB).
Air Vent Color Chart
Venting packs contain four pieces plus two end plugs, three connector plugs and straps. Flash FilterVent includes four pieces of Supplemental Flashing.
Note: Venting packs can be shipped UPS, except Zinc.
THE SIMPLE MATHEMATICS OF A BALANCED RIDGE VENTILATION SYSTEM
- According to most building codes, you need 1 square foot of ventilation for every 150 square feet of attic floor space.
- For new home construction that includes a vapor retarder, the minimum is 1 square foot of ventilation for every 300 square feet of attic floor space.
- If your vents are split between ridge vents and intake vents, the minimum requirement is also 1 square foot of ventilation for every 300 square feet of attic floor space.
To determine how many feet of net free area you need, use this formula:
|Square feet of attic floor space
|=||Square feet of net free area needed|
|1500 square feet of attic floor space
|=||5 square feet of free are a needed|
- To determine how many feet of ShingleVent® II, Multi-Pitch FilterVent® or VenturiVent Plus™ you need, use this formula:
- 1/2 net free area x 144 ÷ 18 = feet of ridge vent needed
- For example: 2.5 (based on net free area of 5 square feet) x 144 ÷ 18 = 20 feet of ridge vent needed
- To determine how many feet of Air Vent soffit vents you need, use this formula:
- 1/2 net free area x 144 ÷ 9 = feet of soffit vent needed
- For example: 2.5 (based on net free area of 5 square feet) x 144 ÷ 9 = 40 feet of soffit vent needed
- The following charts may be used to:
- 1. Determine how much net free area is needed to satisfy FHA requirements.
- 2. Balance your ridge vent system.
DETERMINING VENTILATION REQUIREMENTS
|Min. Net Free Area Required
(if balanced between intake and exhaust)
Note: ShingleVent II and Multi-Pitch FilterVent provide 18" of net free area per linear foot.
- Measure the square footage of the attic (length x width).
- Measure the length of the ridge.
- Refer to the chart above for required net free area and minimum length of ridge for attic square footage.
- Note: In most cases, the length of the ridge balanced with the same net free area of intake vents will satisfy FHA minimum standards and most building codes.
- Use the chart below to calculate the amount of intake vents that should be installed to balance your ridge vent system.
- Always install ridge vents from end to end across the entire ridge for best appearance and to provide maximum ventilation area.
- Hip roofs, dormers and T- or L-shaped roofs may require a specially designed ventilation system. For information, request a copy of Air Vent's Principles of Attic Ventilation.See Contact Us.
Balancing Your Ridge Vent System
|Length of Ridge||Linear Feet of
Continuous Soffit Vent
|Number of Undereave Vents|
|16" x 8"||16" x 6"||16" x 4"|