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Specifications
Ridge Vents

When 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, some of the vents have product evalutation approvals from specific code bodies.

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.

Product	Model	Description	Colors	Size	Net Free Area	Roof Pitch
ShingleVent II	SHFV203, 12" wide	Shingle-over ridge vent	Black, Brown, Gray, Charcoal	4'	18 sq. in. per ft.	3/12 to 16/12
ShingleVent II-9	SHFV209, 9" wide	Shingle-over ridge vent	Charcoal	4'	16 sq. in. per ft.	3/12 to 12/12
ShingleVent II-7	SHFVII-7, 7" wide	Shingle-over ridge vent	Charcoal	4'	16 sq. in. per ft.	3/12 to 12/12
ShingleVent II-9A	CLASH9CC, 9" wide	Shingle-over ridge vent	Charcoal	4'	16 sq. in. per ft.	3/12 to 12/12
ShingleVent II-7A	CLASH7CC, 7" wide	Shingle-over ridge vent	Charcoal	4'	16 sq. in. per ft.	3/12 to 12/12
Multi-Pitch FilterVent	FV101	Aluminum ridge vent	Black, Brown, White, Gray, Mill, Bronze, Zinc, Copper	10'*	18 sq. in. per ft.	3/12 to 12/12
	FV110	Aluminum ridge vent	Black, Brown, White, Gray, Mill, Bronze, Zinc, Copper	8'*	18 sq. in. per ft.
VenturiVent Plus	VVP	Shingle-over ridge vent	Black	4'	18 sq. in. per ft.	3/12 to 16/12
Peak Performer™ I	PPI	Shingle-over ridge vent in a roll (unfiltered)	Black	28'	12 sq. in. per ft.	3/12 to 12/12
Peak Performer™ II	PPII	Shingle-over ridge vent in a roll (filtered)	Black	28'	12 sq. in. per ft.	3/12 to 12/12
VenturiVent Roll	VVR20	Shingle-over ridge vent in a roll (unfiltered)	Black	20'	12 sq. in. per ft.	3/12 to 12/12
Peak FilterVent	PVF152	Aluminum peak vent for contemporary roof designs	Black, Brown, Gray, Bronze	Venting Pack	9 sq. in. per ft.	3/12 to 12/12
Flash FilterVent	FFV162	Aluminum vent for roof/wall junctions	Black, Brown, Gray, Bronze, Copper	Venting Pack	9 sq. in. per ft.	3/12 to 12/12
Utility FilterVent	UFV172	Aluminum vent for specialty applications	Black, Brown, Gray, Bronze	Venting Pack	9 sq. in. per ft.	3/12 to 16/12
Tile/Shake FilterVent	TFV111	Adapters cover ends of tile, shake or metal roofs available for all FilterVent products	Black, Brown, White, Gray, Mill	Venting Pack	18 sq. in. per ft.	3/12 to 12/12

Venting packs contain four eight-foot pieces, 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, Copper and Tile/Shake FilterVent.
* Also available in venting packs.

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Designing The Balance System™ For Attic Ventilation

Research has shown that the best way to ventilate an attic is with a system that provides continuous airflow along the entire underside of the roof sheathing. Achieving this desired airflow requires a balanced system of intake ventilation low at the roof's edge or in the soffit/eaves and exhaust ventilation at the ridge. Air Vent offers a variety of high performance intake vents including our NEW Edge™ Vent.

For optimum attic ventilation for today's tighter built, tighter remodeled homes that have more efficient building materials, Air Vent recommends exceeding minimum building codes.* Air Vent recommends 1 square foot of ventilation for every 150 square feet of attic floor space with half the ventilation represented by intake vents and half by exhaust vents such as ridge vents.

To determine how many feet of net free area you need for a balanced ridge vent/intake vent system, use this formula:

Sq. ft. of attic floor space 150

=

Sq. ft. of net free area needed

To determine how many linear feet of Air Vent's ShingleVent II you need, use this formula:
½ net free area needed x 144 / 18 = minimum feet of ShingleVent II

To determine how many linear feet of Air Vent's NEW Edge Vent intake you need, use this formula:
½ net free area needed x 144 / 9 = minimum feet of The Edge Vent

* For minimum building code requirements use the 1/300 ratio instead of the 1/150 ratio.

Appendix: Ridge Vent/Intake Vent Calculator for Standard Gable Attic*
*An electronic version of this calculator is available here.

To use this calculator, first find the total square footage of the attic floor area. Round your calculations up to the next highest number (see Appendix A).

Then look across to the number under the Minimum Length of Ridge column. That tells you the total linear feet of ridge vent required using the 1/300 minimum code requirements. Note: Because today's tighter homes require more airflow, the 1/150 ratio is also included in Appendix A.

To balance your ridge vent system, find the length of the ridge and follow the column to the right for required intake vents (see Appendix B).

Appendix A: Ventilation Requirements

Attic Square Footage	Minimum Length of Ridge at 1/300 ratio	Minimum Length of Ridge at 1/150 ratio
1200	16	32
1500	20	40
1800	24	48
2100	28	56
2400	32	64
2600	36	72
3000	40	80
3300	44	88

Note: Calculations are based on ShingleVent II and Multi-Pitch FilterVent which provide 18" of net free area per linear foot.

Appendix B: Balancing Your Ridge Vent System

Length of Ridge	Linear Feet of The Edge Vent shingle-over intake	Number of Undereave Vents
		16"x8"	16"x6"	16"x4"
15'	30	5	6	10
20'	40	6	9	13
30'	60	10	13	19
40'	80	13	17	26
50'	100	16	21	32
60'	120	19	26	39
70'	140	23	30	45
80'	160	26	34	51
90'	180	29	39	58

Note: FHA requirements and most building codes state the minimum required net free area. This minimum ventilation area may not be enough to effectively ventilate the attic to prevent moisture damage and cool the attic enough in the winter to prevent ice dams.