DuraVent Model BV Low Profile Double Wall Increaser: a size step in about 1 inch
The DuraVent Model BV Low Profile Double Wall Increaser is a short fitting that connects smaller vent pipe to larger pipe. At about 1 inch tall, it is the shortest way to increase the diameter where a regular increaser will not fit. 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. Choose the smaller diameter first, then the larger diameter. There are sixteen combinations, from 3 to 4 inch through 8 to 10 inch. This same fitting also comes with a reduction tee.
Model BV pipe and fittings are not cut. Fixed pipe lengths from 6 to 60 inches and an adjustable length handle the distance without needing an exact inch measurement. An air space between the aluminum inner pipe and galvanized steel outer pipe keeps the inside hot so exhaust rises well, while the outside stays cool. Have room for a taller fitting? See the DuraVent Model BV Increaser in regular height. The DuraVent Model BV Low Profile Double Wall Increaser ships free from My Cozy Outdoors with No Sales Tax (except WY) and the full manufacturer warranty.
Details
SKU: 3BVLX4 | 3BVLX5 | 3BVLX6 | 3BVLX7 | 3BVLX8 |
SKU: 4BVLX5 | 4BVLX6 | 4BVLX7 | 4BVLX8 |
SKU: 5BVLX6 | 5BVLX7 | 5BVLX8 |
SKU: 6BVLX7 | 6BVLX8 |
SKU: 7BVLX8 |
SKU: 8BVLX10
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).