DuraVent Model BV Large Diameter Tall Cone Flat Flashing: a tall cone for flat roofs and snow
The DuraVent Model BV Large Diameter Tall Cone Flat Flashing is a roof flashing that covers the opening around a large gas vent. It fits roofs from flat to 1 in 12. Its tall cone raises the storm collar, the ring around the pipe above the flashing, well above the roof to keep packed snow from covering the vent. The storm collar is sold separately. 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 Model BV vent. In areas with heavy snowfall, the cap height is measured from the average snow depth rather than the roof surface. If the vent extends more than 5 feet above the roof, it needs guy wires for support. Those wires attach to the pipe, not the cap. Have a pitched roof? See the DuraVent Model BV Large Diameter Adjustable Roof Flashing for pitched roofs. The DuraVent Model BV Large Diameter Tall Cone Flat Flashing ships free from My Cozy Outdoors with No Sales Tax (except WY) and the full manufacturer warranty.
Details
SKU: 10BVFF | 12BVFF | 14BVFF | 16BVFF | 18BVFF | 20BVFF | 22BVFF | 24BVFF | 26BVFF | 28BVFF | 30BVFF
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).