Cor-A-Vent Product Guide

Balanced ventilation - The rightproportion of venting. COR-A-VENT® has promoted and taught balanced ventilation from the day we started. It' s a concept all vent manufactures readily endorse. Unfortunately, that information doesn't always end up in the hands of the person designing the building or installing the vents. Balanced venting helps insure the performance you expect from ridge venting - uniform, increased airflow through the roof cavity without weather infiltration. Balanced venting: An equal or greater amount ofvent opening (sq. in. net 1111111111111111111111111111111 11111111111111111111111111111111111111111111111111111111111111111111 free vent areafflFVA) in the lllllllllllllllltllllllllllllllUIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIUI� 11111111111 ���: T E �:�t i NG) VEN T S ! = = = CJ �r�f1t����AREAS ..__......,.._ _ __, 1. SKYLIGHTS 2. DORMERS 3. INTERSECTING BUILDING COMPONENTS 4. VALLEYS 5. CHIMNEYS Figuring Your Ventilation Needs: soffit (intake) than at the ridge. For example, our V-300 products have 13.5 sq. in NFVA per lineal foot. To balance this, you need 2 soffit/eave/intake vents of at least 6.75 sq. in. per lineal foot (1/2 of 13.5 in each overhang). Balanced venting: Continuous soffit vents are recommended, especially for venting cathedral ceilings. Wherever there is ridge V-400E: Square footage of building foo1:]rint X .48 = Lineal Feet V-600E needed 20 V-300: Square footage of building footprint X .48 = Lineal Feet V-300 needed 13.5 D D vent above, there should be soffit/eave/intake vents on the structure below. Also, COR-A-VENT strongly recommends using of one of our V-300 products (available in 11, 81/2 or 7'' widths) on cathedral ceiling and hip roof applications. V -300 delivers 13.5 sq. in. net free vent area. The volume of space to be vented in cathedrals is smaller. Therefore a lower profile (5/8") vent is called for to further reduce the chance for infiltration. When installing a ridge vent system, all other vent openings (except soffits) must be closed off. Example: 25' x 50' = 1250 Sq.F. 1250 X .48 = 600 600 .;- 17 = 35 L.F. V -400E needed The above formulas will give the amount of COR-A-VENT ridge vent needed for a 1/150 vent ratio, provided an equal or greater amount of soffit venting is used. For a 1/300 ratio, (building code minimum) use half the amount of ridge vent. Note: Code interpretation may vary. Consult your local building dept. For the best appearance and perfonnance install COR-A-VENT ridge and so/fit vents continuously at the rid e and in the so ts. Typical Vent Chute Applications Cathedral Ceiling Maintaining an unrestricted air passageway between the soffit and ridge is crucial to the performance of the vent system, and must not be blocked or restricted. COR-A-VENT recommends a minimum 2" air space between the roof sheathing and vent chute or insulation Note: Should you need any assistance in designing your ventilation system, f ax or mail a sketch and in f ormation to our technical services department. COR-A-VENT will respond with recommendations f or your particular building design. This material maybe duplicated only for the purposes of specifying COR-A-VENT products. No permission is given to duplicate or otherwise copy this material for anyother purpose without the express written permission of COR-A-VENT, Inc. COR-A-VENT products meet or exceed all nationally recognized building codes for ventilation. COR-A-VENT products are covered under the following patents: 5,054,254;5,328,407;5,339,582;5,439,417;5,542,882;5,603,657;5,704,834;5,803,805;5,839,059;5,921,863; 6,039,646; 6,213,868; 6,558,251B2; 6,589,113; 6,598,356; D465,839- additional patents pending. © 2006 COR-A-VENT, Inc. Made in the USA. S-400 Application Brochure 12/14 COR-A-VENT, Inc. • P.O. Box 428 • Mishawaka, IN 46546-0428 Phone: (800) 837-8368 Fax: (800) 645-6162 info@cor-a-vent.com • www.cor-a-vent.com