DuraVent Model BV Tall Cone Adjustable Roof Flashing: a taller cone for roofs where snow collects
The DuraVent Model BV Tall Cone Adjustable Roof Flashing is a flashing that covers the roof opening around a gas vent pipe. Its extra cone height raises the storm collar above the roof surface, away from accumulating snow. It adjusts to roof slopes up to 6 in 12. 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 diameter from 3 to 8 inch to match your vent. The vent size comes from fuel gas code tables and the appliance’s own specifications, rather than a size chosen by DuraVent. The run needs at least 5 feet of vent above the appliance’s draft hood, the fitting where exhaust enters the vent. It needs more when the route bends around an obstacle or serves two appliances. Working with a flat roof? See the DuraVent Model BV Tall Cone Flat Flashing for flat roofs. The DuraVent Model BV Tall Cone Adjustable Roof Flashing ships free from My Cozy Outdoors with No Sales Tax (except WY) and the full manufacturer warranty.
Details
SKU: 3BVFTA | 4BVFTA | 5BVFTA | 6BVFTA | 7BVFTA | 8BVFTA
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).