DuraVent Model BV Large Diameter Adjustable Roof Flashing: fits roofs from flat to 6 in 12
The DuraVent Model BV Large Diameter Adjustable Roof Flashing is the fitting around a large gas vent where it passes through the roof. Its cone tilts to match the roof slope, from flat to 6 in 12. This is DuraVent’s only pitched roof flashing for these sizes, with no version for steeper roofs. 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. Choose a size from 10 to 30 inch to match your vent. The storm collar is sold separately.
Cap height above the roof depends on vent size. A 10 or 12 inch cap stands at least 1 foot above roofs up to 7 in 12, rising to 4 feet at 12 in 12, and stays 8 feet from any wall. For 14 inch and larger vents, the cap stands 2 feet above the roof opening and anything within 10 feet, regardless of slope. Have a flat roof? See the DuraVent Model BV Large Diameter Tall Cone Flat Flashing. The DuraVent Model BV Large Diameter Adjustable Roof Flashing ships free from My Cozy Outdoors with No Sales Tax (except WY) and the full manufacturer warranty.
Details
SKU: 10BVF | 12BVF | 14BVF | 16BVF | 18BVF | 20BVF | 22BVF | 24BVF | 26BVF | 28BVF | 30BVF
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).