DuraVent Model BV Oval Ceiling Plate Spacer: centers the vent above a gas wall furnace
The DuraVent Model BV Oval Ceiling Plate Spacer is a 4 inch spacer for the first ceiling above a gas wall furnace. DuraVent requires a pair here. They nail across the ceiling plate cutout, holding the oval vent in the middle and keeping the opening between floors clear. Both oval kits include two. 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 pipe has an aluminum inside wall and a galvanized steel outside wall, separated by air. Oval pipe and fittings normally need 1 inch of open air space from anything that can burn. There is one wall exception: 4 or 5 inch oval centered between 2 by 4 studs spaced 16 inches on center, with DuraVent spacers at each ceiling. That bay must contain nothing else, including insulation. Only straight pipe, with or without an oval tee, qualifies. The space left around the centered pipe is the clearance. Working on a ceiling above the first? Use the DuraVent Model BV Oval Firestop Spacer. The DuraVent Model BV Oval Ceiling Plate Spacer ships free from My Cozy Outdoors with No Sales Tax (except WY) and the full manufacturer warranty.
Details
SKU: 4BVOCS
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).