DuraVent Model BV High Wind Cap: a roof cap for windy locations
The DuraVent Model BV High Wind Cap is the cap that tops a vertical gas vent above the roof. Its shape helps exhaust keep moving out when wind blows across the vent. It is for vertical vents only, not a vent ending through a wall. Model BV is DuraVent’s Type B gas vent, the double wall pipe that carries the exhaust from a gas furnace, boiler, or water heater out of the house. This cap uses the same DuraLock connection as the pipe rather than a clip. The ends push together until seated, then a thumb presses the DuraTab into place to do the job of a screw.
Choose your vent diameter on this page. Sizes run from 3 to 8 inch, with larger sizes available up to 18 inch. The vent size comes from fuel gas sizing rules and the appliance’s specifications, not from the cap choice. Releasing the tab lets the cap be pried off. A wind cap cannot correct poor draft caused by a house with too little incoming air or by exhaust fans. Need the standard cap? See the DuraVent Model BV DuraCap standard cap. The DuraVent Model BV High Wind Cap ships free from My Cozy Outdoors with No Sales Tax (except WY) and the full manufacturer warranty.
Details
SKU: 3BVVTH | 4BVVTH | 5BVVTH | 6BVVTH | 7BVVTH | 8BVVTH | 10BVVT-1 | 12BVVT-1 | 14BVVT | 16BVVT | 18BVVT
Applications
Duravent’s Type B Gas Vent system. Use with natural gas or liquid propane Category I and draft hood equipped appliances, and appliances tested and listed to use Type B Gas Vent. Applications include: natural gas fireplaces, gas-fired furnaces, boilers, water heaters, and wall or space heating applications.
Materials and Construction
Round Type B Gas Vent 3″ – 8″ and Oval 4″ – 6″: Aluminum .012″ inner wall, galvanized .018″ outer wall, in Canada, the lengths have a galvalume .018″ outer wall. The 3″ – 8″ Round gas vent features DuraLock® and DuraTab® . The Oval gas vent features the button lock.
Round Type B Gas Vent 10″ – 18″: Aluminum .014″ inner wall, galvanized .018″ outer wall. DuraLock® feature for 10″ and larger diameters.
Round Type B Gas Vent 20″ – 30″: aluminum .023″ inner wall, galvanized .018″ outer wall. DuraLock® feature for 10″ and larger diameters.
Clearances
Clearances to combustible materials in single and multi-family dwellings:
- 1″ Clearance – USA – 3″ to 30″
- 1″ Clearance – Canada – 3″ to 24″
- 2″ Clearance – Canada – 26″ to 30″
Annular insulating air space
- 3″ – 8″ Round Vent: 1/4″ air space
- 4″ – 6″ Oval Vent: 1/4″ air space
- 10″ – 30″ Round Vent: 1/2″ air space
Diameters
Listings
UL Listed to UL 441 and CAN/ULC-S605 (MH2848 and MH17667).