Rugged Construction
Strong, durable galvanized steel outer pipe has internal spacing beads to assure a uniform insulating air space between pipe walls. Each end is die formed to assure uniform sizing for strong, easy to connect joints. In Canada, some lengths are available in galvalume steel outer pipe.
Assured Safety
The double wall (pipe within a pipe) construction with its built-in air space, provides permanent insulation and keeps the inner pipe hot and the outer pipe relatively cool. This construction creates quick, strong vent action reducing condensation in the pipe and overheating of nearby enclosure surfaces.
Fully Tested and Listed
Duravent Model BV and BVO Type B Gas Vent has been tested and listed per UL 441 for installation as Type B and BW gas vents. These can be installed in single and multi-story buildings in accordance with the standards of NFPA 54 and NFPA 211. In Canada, Duravent Model BV Type B Gas Vent has been tested and listed per CAN/ULC-S605 for installation as Type B and BW gas vents. It can be installed in single and multi-story buildings in accordance with CAN/CSA-B149.1.00.
Kits
- 3″-6″ Termination Kits Include: DuraCap, Storm Collar, Adjustable Roof Flashing, Draft Hood Connector (Lengths sold separately)
- 3″-4″ Vertical Heater Kit Includes: 12” & (3) 24” Galvalume Pipe Lengths, 90° Elbow, 4” Diameter Draft Hood Connector, 3” Draft Hood Connector, 3”-4” Increaser, Adjustable Flashing, Storm Collar & DuraCap
- USA Only – 4″ Oval Kit Includes: (2) 24″ Lengths, Oval Base Plate, (2) Ceiling Spacers, Oval-Round Adapter
Lengths
- 18″ Adjustable Lengths in 3″-6″ dia.
- 12″ & 24″ Lengths in 10″-30″ dia.
- Canada – Additional 24″ Galvalume Length (8BV24C)
Reducing Tees
- Standard Tee paired with Low Profile Increasers
- Increaser can be installed at the branch or the body
- 3″ – 8″ diameter combinations
Low Profile Increasers
- New space saving length where height restrictions apply
Universal Male and Female Adapters
- Male Adapter – Used to convert Model GV to Model BV
- Female Adapter – Used to convert Model BV to Model GV
- Available in 3″ – 8″ diameter sizes
Quick Grip Firestops / Supports
- Combination Firestop and Vent Support
- Supports up to 30′ of pipe
- Available in 3″ -6 ” diameter sizes
- Install above a framed opening
DuraConnect I – Expandable Flexible Connectors
- Available in 3″ & 4″ diameters
- Available in 3′ (expandable from 2′ – 3.5′) and 5′ (expandable from 2.5′ – 5′) lengths
- Replaces Single Wall Connectors
- Draft Hood Connector Incorporated
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).
