DuraVent Model BV Oval to Round Adapter: from the wall to a round roof vent
The DuraVent Model BV Oval to Round Adapter is a fitting that connects oval gas vent to round Model BV pipe at the top of the wall. It lets the round pipe continue through the attic and roof, where round roof fittings cost less than their oval counterparts. 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. Above the last ceiling, the vent can stay oval or change to round, depending on its size and the roof slope.
Choose 4, 5, or 6 inch to match your vent. For a 5 or 6 inch oval run, this adapter is the only route to a cap because the oval cap comes in 4 inch only. The oval flashing, which covers the roof opening, also comes only in 4 inch and fits roofs from flat to 5 in 12. A steeper roof needs a round finish too. One adapter is included in the oval vent kit. Changing from round to oval instead? See the DuraVent Model BV Round to Oval Adapter. The DuraVent Model BV Oval to Round Adapter ships free from My Cozy Outdoors with No Sales Tax (except WY) and the full manufacturer warranty.
Details
SKU: 4BVOAOR | 5BVOAOR | 6BVOAOR
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).