DWFL-ZC Gas Vent

Extremely rugged made in all stainless with 25-year warranty.
Leak proof high pressure joints.
Cut length available for maximum field flexibility.
Smooth flow and known resistance for accurate factory pressure calculations.
Zero clearance and two-hour fire rated so it eliminates the requirements for an additional fire rated shaft.

Eliminates the need for fire dampers in HVAC ducts and fume venting applications.
Stainless steel and factory-insulated zero clearance assembly for special gas vent.
For use as gas vents, laundry exhausts, make-up air ducts, dryer exhausts, fume venting, HVAC ductwork, and other exhaust systems.

Inner Material	Inner liner made of high-grade ASTM 444 stainless steel.
Outer Jacket Material	Outer jacket made of ASTM 304 stainless steel
Wall thickness	Inner 6” through 36” = 0.035” thick Outer 6” through 24” = 0.025” thick 26” through 36” = 0.035” thick
Inner diameter	6'' - 36'' I.D.
Insulation	3.25” thick compressed ceramic fiber insulation
Connection	Inner connection is a 1.25” overlapping joint with added ½” rolled flange and vee band connection. Supplied sealant is used in the vee band to make seal. Blanket insulation and outer band completes the joint assembly.
Locking band	Attached to each part

DWFL-ZC Gas Vent
UL Listings (and ULC) UL-1738 Standard, Venting Systems for Gas-Burning Appliances, Categories II, III & IV (ULC-S636 Standard for Type BH Gas Venting Systems) UL-2221 Zero Clearance to combustibles and two-hour fire rated-resistive enclosure assembly UL-1978 Standard, Grease Duct (ULC-S662 Standard for Factory-Built Grease Ducts) UL-441 Standard, Gas Vents (ULC-S605 Standard for Gas Vents) 90” W.C. Pressure Listing for all Applications

DWFL-ZC Gas Vent

UL-1738 Standard, Venting Systems for Gas-Burning Appliances, Categories II, III & IV (ULC-S636 Standard for Type BH Gas Venting Systems)

UL-2221 Zero Clearance to combustibles and two-hour fire rated-resistive enclosure assembly

UL-1978 Standard, Grease Duct (ULC-S662 Standard for Factory-Built Grease Ducts)

UL-441 Standard, Gas Vents (ULC-S605 Standard for Gas Vents)

90” W.C. Pressure Listing for all Applications

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