DuraVent Model BV Round to Oval Adapter: from round pipe into a wall vent
The DuraVent Model BV Round to Oval Adapter is a fitting that joins a round vent run to oval pipe. It goes where a round pipe or connector needs to enter a stud wall and continue upward inside 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 oval version is flattened to fit inside a wall, often above a gas wall furnace. This adapter takes the run into oval, not back into round.
Choose 4, 5, or 6 inch on this page. The size describes the flow of the matching round pipe, not the oval pipe’s width. For the oval run, 4 inch fits a 2 by 4 wall, 5 inch fits a 2 by 4 or 2 by 6 wall, and 6 inch fits a 2 by 6 wall. This vent is for natural gas or propane only. The adapter needs 1 inch of open air space from anything that can burn. Returning to round above the wall? See the DuraVent Model BV Oval to Round Adapter. The DuraVent Model BV Round to Oval Adapter ships free from My Cozy Outdoors with No Sales Tax (except WY) and the full manufacturer warranty.
Details
SKU: 4BVOARO | 5BVOARO | 6BVOARO
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).