DuraVent Model BV Oval Adjustable Roof Flashing: for vent that stays oval through the roof
The DuraVent Model BV Oval Adjustable Roof Flashing is the roof fitting for a vent that stays oval all the way outside. It fits 4 inch oval pipe on roofs from flat to 5 in 12. You can position it along the roof ridge or across it. 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. The storm collar that seals the pipe to the flashing is sold separately.
Above the last ceiling, an oval run can stay oval or change to round with an oval to round adapter. A steeper roof or 5 or 6 inch oval pipe needs the round finish. DuraVent says round flashings, caps, and fittings cost less. Oval pipe couplers press into place one side at a time. A screwdriver can release them without damage. Each joint uses up 1 inch of length, and adjustable pipe fills odd gaps without cutting. Need the matching seal? See the DuraVent Model BV Oval Storm Collar. The DuraVent Model BV Oval Adjustable Roof Flashing ships free from My Cozy Outdoors with No Sales Tax (except WY) and the full manufacturer warranty.
Details
SKU: 4BVOF
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).