DuraVent Model BV Oval Firestop Spacer: centers wall vent and firestops the ceiling opening
The DuraVent Model BV Oval Firestop Spacer is a plate that centers oval vent between studs spaced 16 inches apart, measured from their centers. It also serves as a firestop at the ceiling opening. DuraVent requires it at every floor of a Type B run in a 2 by 4 wall and a wall furnace run through multiple stories. 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. Oval vent is flattened to run inside a stud wall, often above a gas wall furnace.
Choose the vent size, then the wall depth. The 4 and 5 inch spacers fit 2 by 4 or 2 by 6 walls. The 6 inch spacer fits only a 2 by 6 wall. Vent sizes describe equivalent round pipe flow, not oval width. The arrows face up, and the stud bay must be otherwise empty with studs at least 3 1/2 inches deep. At the first ceiling above a wall furnace? See the DuraVent Model BV Oval Ceiling Plate Spacer. The DuraVent Model BV Oval Firestop Spacer ships free from My Cozy Outdoors with No Sales Tax (except WY) and the full manufacturer warranty.
Details
SKU: 4BVOFS | 4BVOFS2X6 | SKU: 5BVOFS | 5BVOF2X6 | SKU: 6BVOFS
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
- 3″- 30″ Round Diameter.
- 4″, 5″ and 6″ Oval (USA only)
Listings
UL Listed to UL 441 and CAN/ULC-S605 (MH2848 and MH17667).