DWFL-ZC Gas Vent

Zero Clearance Gas Vent

DWFL-ZC Zero Clearance

Inner liner made of high-grade ASTM 444 stainless steel.

Outer jacket made of ASTM 304 stainless steel

Inner

6” through 36” = 0.035” thick

Outer

6” through 24” = 0.025” thick

26” through 36” = 0.035” thick

6'' - 36'' I.D.

3.25” thick compressed ceramic fiber insulation

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.

Attached to each part

Eliminates the need for fire dampers in HVAC ducts and fume venting applications.

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.

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.

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

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