Round Gas Vent Product Catalog

Specifications
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
replaces, gas-red 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.
Round Type B Gas Vent 10” - 16”:
Aluminum .016” inner wall, galvanized
.021” outer wall.
Round Type B Gas Vent 18” - 30”:
aluminum .020” inner wall, galvanized
.021” outer wall.
3”-16” diameters feature twist-lock
ttings, screws required for 14” and
larger diameters.
Clearances
1” clearance to combustibles in single
and multi-family dwellings.
Diameters
3”- 30” Round Diameter.
4”, 5”, and 6” Oval.
Listings
UL Listed to UL 441 and UL 1777
(MH6357).
ULC Listed to ULC S605 (CMH1276 &
CMH1407).
UL 441 and ULC S605 System
Type B Gas Vent
DuraVent's innovative system for a lock-tight connection for Type B
Gas Vent called DuraLock. See the alignment indicators meet; feel
the ends grasp together; hear the snap as the connection rmly
locks into place. (See next page.)
DuraVent Type B Gas Vent is designed to meet the rugged
demands of the job site. The inner wall is recessed to eliminate
damage in handling.
Type B Gas Vent has been engineered to heat up rapidly. It
remains hot during the operation of the appliance with minimal
condensation in the appliance and vent system. Pipe lengths
are available in multiple lengths, 6 to 60 inches, with a full
complement of adjustable and rigid ttings.
Type B gas vents are not suitable for use with wood-burning or
coal applications, industrial ovens, exhaust ranges and hoods,
grease or pollution ducting, or as free-standing exhaust vents for
high-temperature applications.
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