When installed in accordance with manufacturer's recommendations, Air Vent products comply with the net free area requirements of nationally recognized model codes, including those written by BOCA, SBCCI and ICBO.

 

Here's an overview of the specifications for Air Vent's complete line of intake ridge ventilation products.

Product	Model	Description	Colors	Size	Net Free Area
The Edge™ Vent	EVI	Shingle-over, roof-top installed intake vent	Black	11.4" x 48"	9 sq. in. per ft.
Continuous Soffit Vent	SV201	Aluminum Continuous soffit vent (Retrofit)	White, Mill, Brown	2-3/4" x 96"	9 sq. in. per ft.
	SV202	Aluminum Continuous soffit vent (New Construction)	White	2-3/4" x 96"	9 sq. in. per ft.
	SV351	PVC Continuous soffit vent (Retrofit)	White	2-3/4" x 96"	9 sq. in. per ft.
Undereave Vents	EV16424	Aluminum	White, Mill, Brown	4" x 16"	28" pc
	EV16624	Aluminum	White, Mill, Brown	6" x 16"	42" pc
	EV16824	Aluminum	White, Mill, Brown	8" x 16"	56" pc
Vented Drip Edge	VDE	Aluminum	White	10'	9 sq. in. per ft.
2" Mini Louvers	MLM2MF	Tooled aluminum; die-stamped grill	Mill	2"	0.47/pc.
3" Mini Louvers	MLM3MF	Tooled aluminum; die-stamped grill	Mill	3"	1.34/pc.
4" Mini Louvers	MLM4MF	Tooled aluminum; die-stamped grill	Mill	4"	2.88/pc.

 

 

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 300	=	Square feet of net free area needed
For example:
1500 square feet of attic floor space 300	=	5 square feet of free area needed

 

Ridge Vent/Intake Vent Calculator for Standard Gable Attic

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 Ventilations Requirements).

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.

To balance your ridge vent system, find the length of the ridge and follow the column to the right for required intake vents (see Balancing Your Ridge Vent System).

 

Ventilation Requirements

Attic Square Footage	Minimum Length of Ridge
	at 1/300 ratio	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.

 

Balancing Your Ridge Vent System

Length of Ridge	Linear Feet of The Edge™ Vent shingle-over intake	Number of Undereave Vents
		16" x 8"	16" x 6"	16" x 4"
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

 

 

 

 

 

 

 

 

 

 

 

Learn about warranty coverage, transferability, limitations, other conditions and customer responsibilities.

 

Read the full warranty and the list of eligible products.

 

For Warranty information and questions, please contact us at: warranty@gibraltar1.com 

 

 Download Full Air Vent Warranty Information

 

Limited Warranty
The Air Vent Product that you have purchased has a limited warranty from the date of purchase against defects in workmanship and materials. The length of the warranty varies by product. Please see attached chart for details. This warranty does not cover any labor costs, including those required for field repair or replacement or removal of any allegedly defective part.

 

Proof of purchase is required when requesting warranty service.
The original purchaser must present a sales receipt or other document that establishes proof of purchase.
Please do not ship your fan or any fan parts to Air Vent unless requested to do so.

 

Limitations
Air Vent shall not be liable for, and this warranty does not apply to, any failure, defect or damage resulting from or connected with misuse, abuse, neglect or improper handling or staging , or installation not in strict adherence to Air Vent’s written instructions; impact of foreign objects, fire, flood, earthquake, lightning, hurricane, hail, tornado or other violent storms or other act of God; or defects in failure of or damage caused by materials used as roofing base over which the product is installed or by movement, distortion, cracking or settling of walls or the foundation of the building.

Air Vent reserves the right to discontinue or modify any of its products including color, and shall not be liable as a result of such discontinuation or modification, nor shall Air Vent be liable in the event replacement material may vary in color in comparison to the original product as a result of normal weathering. If Air Vent replaces any product under this warranty, it may substitute products designated by Air Vent to be of comparable quality or price range in the event the product initially installed has been discontinued or modified.

 

Replacement Plus™ Protection
Products are covered by Replacement Plus™ protection (see attached for applicable products) for a period of time (varies by product) provided that the product has been installed in strict accordance with Air Vent’s written installation instructions. Under this warranty feature, Air Vent, at no charge, will replace any product found to be defective during the Replacement Plus™ period as long as proof of purchase is submitted to Air Vent (Replacement Plus™ period begins when the product installation is completed). Air Vent’s maximum liability under Replacement Plus will be equal to the reasonable cost to replace the defective product, including labor.

In instances in which Air Vent, according to the terms of this warranty, has agreed to pay the cost of labor required to replace a defective intake vent, Air Vent will provide reimbursement only upon receipt of a copy of the contractor’s invoice or other written evidence of the completion of the work which Air Vent, at its sole discretion, deems acceptable.

 

Transferability
Provided that the products covered by this warranty have been installed in strict accordance with the Air Vent Inc. written installation instructions and in accordance with all local codes and standards, including those pertaining to fire-rated construction, Air Vent warrants to the original purchaser or first subsequent owner of the property that the product is free from manufacturing defects for the described length below from the date of purchase. If there is a change in ownership, the warranty may be transferred by the original purchaser of the product to the new owner (first subsequent owner) under the terms and conditions of this warranty.

 

Motor Replacements
The electrical motor is to be used solely as a direct replacement for a motor of the same model in an Air Vent, Inc, power attic ventilator. Using the motor in any other product could result in electrical shock and/or fire, which may cause property damage, serious injury or even death. Any motor replacement should be installed by a qualified licensed electrician in accordance with local, state and national electrical codes and standards. Make sure that power to the unit has been completely turned OFF at the breaker before approaching or inspecting the power attic ventilator or installing the replacement motor.

 

Other Conditions
This warranty is expressly in lieu of all other oral or written warranties, liabilities or obligations of Air Vent. Pertinent state law shall control for what period of time subsequent to sale a consumer/homeowner may seek a remedy pursuant to the implied warranty of merchantability or fitness for a particular purpose. In no event shall Air Vent be liable for consequential or incidental damages of any kind, including any damage to the building, its contents or any persons therein, resulting from the breach of any warranty set forth herein, unless exclusion of these types of damages are specifically prohibited by state law. No field representative of Air Vent or any distributor or dealer is authorized to make any change or modifications to this warranty. This warranty gives you specific legal rights, and you may also have other rights that vary from state to state.

 

The following warranty is effective 3/26/2021.

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Product	Model Number	Warranty	Replacement Plus Protection
ShingleVent ®II ridge vent (12", 9", Class A 9")		Limited Lifetime Warranty	5 year Replacement Plus™ protection
Peak Performer™ I & II Rolled ridge vent		Limited Lifetime Warranty	5 year Replacement Plus™ protection
The Edge™ Vent		Limited Lifetime Warranty	5 year Replacement Plus™ protection
Hip Ridge® Vent		Limited Lifetime Warranty	5 year Replacement Plus™ protection
VenturiVent™ Plus ridge vent and rolled ridge vent		Limited Lifetime Warranty	5 year Replacement Plus™ protection
ATTIC-AIRE™ ALL SEASONS™ Filtered Ridge Vent and Roll Vent		Limited Lifetime Warranty	5 year Replacement Plus™ protection
RidgeHawk™ Rolled ridge vent with nails	RH20	Limited Lifetime Warranty
ShadowHawk® Low Profile Vent	LPG72	Limited Lifetime Warranty	5 year Replacement Plus™ protection
Roof Mount Power Vent	ASRHP, SV3000, HE15WW	Limited Lifetime Warranty	5 year Replacement Plus™ protection
Roof Mount Power Vent	RV26, RV28, PC12	10 Year Limited Warranty	5 year Replacement Plus™ protection
Gable-Mount Power Vent	APG, APGH	Limited Lifetime Warranty	5 year Replacement Plus™ protection
Gable-Mount Power Fans (WCGB)- with Thermostat		Limited Lifetime Warranty	5 year Replacement Plus™ protection
Gable-Mount Power Fans (model WCGA)		5 Year Limited Warranty	5 year Replacement Plus™ protection
Roof Mount Solar Power Fans	NPSP8WW, SC8BL	5 Year Limited Warranty	2 year Replacement Plus™ protection
Gable Mount Solar Power Fans	NPSG8	5 Year Limited Warranty	2 year Replacement Plus™ protection
Whole-House Fans		10 Year Limited Warranty	5 year Replacement Plus™ protection
Roof Louvers/Static Vents		5 Year Limited Warranty
Airhawk® Wind Turbines	TIB, TOB series
Type B Gas Vent Cap	PTOP Series	5 Year Limited Warranty
Automatic Foundation Vent		5 Year Limited Warranty
Powered Foundation Vent		5 Year Limited Warranty
Low Voltage Foundation Vent	Series 5 & 6, Radon	5 Year Limited Warranty
Roof Mount Solar Power Fans	9010TR, 9025TR	5 Year Limited Warranty on Fan Motors	20 Year Limited on Solar Panel, Fan Housings
Gable Mount 20 Watt Solar Fan	1125APV	5 Year Limited Warranty on Fan Motors	20 Year Limited on Solar Panel, Fan Housings
Skylight Tubes	2214ST-LK	10 Year Limited Warranty
Archived Products
Product	Model Number	Warranty	Replacement Plus Protection
ShingleVent ®II ridge vent 7", Class A 7"		Limited Lifetime Warranty	5 year Replacement Plus™ protection
Ridge Vent 20’	MRV20	Limited Lifetime Warranty
Attic Aire™ Wind Turbines (WT series)		5 Year Limited Warranty
Roof Mount Solar Power Fans	9910TR, 9920TR, 9930TR	5 Year Limited Warranty on Fan Motors	20 Year Limited on Solar Panel, Fan Housings
Gable Mount 20 Watt Solar Fan	1020APV	5 Year Limited Warranty on Fan Motors	20 Year Limited on Solar Panel, Fan Housings
U.S. Sunlight Solar Controller	SC20	1 Year Limited Warranty on Unit, Remote
Skylight Tubes	1914ST, 2114ST	10 Year Limited Warranty