DWFL +1, +2, +3 and +4

All-In-One Exhaust, Chimney or Vent:
DWFL – Double Wall Flanged Joint

SYSTEM_DETAIL_ICONS

Extremely rigid and made of all-stainless with limited lifetime warranty
Leak proof high pressure joints
All components are stainless steel
Smooth flow and known resistance for perfected factory pressure calculations
Low and man-safe skin temperatures and dramatically reduced clearance to combustibles

All-stainless and fiber insulated chimney or vent for:

Applicable for all fuels: gas, oil, and solid fuels including wood.

Inner Material	Inner liner made of high-grade 444 stainless steel
Outer Jacket Material	Outer jacket made of 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	Ceramic fiber insulation at: 1.25”, 2.25”, 3.25”, or 4.25” thick fiber
Connection	Inner connection is a 1.25” conical 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 +1, +2, +3 and +4
UL Listings (and ULC) UL-2561 Standard, 1400F Chimney Listing (ULC/ORD-C959 Industrial Type 760 C Chimney) UL-103 Standard, Building Heating Appliance Chimney (Industrial Type 540°C Chimney) UL-103 Additional Positive Pressure Listing to 90” WC UL-103 Additional Type HT Listing (DWFL+ only) UL-1978 Standard, Grease Duct (ULC-S662) Standard for Factory-Built Grease Ducts UL-1738 Standard, Venting Systems for Gas-Burning Appliances, Categories II, III & IV (ULC-S636 Standard for Type BH Gas Venting Systems) UL-641 Standard, Type L Low-Temperature Venting System (ULC-S609 (Canadian) Standard für Low-Temperature Vents Type L) Not exceeding 570°F UL-441 Standard, Gas Vents (ULC-S605 Standard for Gas Vents)

DWFL +1, +2, +3 and +4

UL-2561 Standard, 1400F Chimney Listing (ULC/ORD-C959 Industrial Type 760 C Chimney)

UL-103 Standard, Building Heating Appliance Chimney (Industrial Type 540°C Chimney)

UL-103 Additional Positive Pressure Listing to 90” WC

UL-103 Additional Type HT Listing (DWFL+ only)

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

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

UL-641 Standard, Type L Low-Temperature Venting System (ULC-S609 (Canadian) Standard für Low-Temperature Vents Type L) Not exceeding 570°F

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

Personal advice, optimal service and personal contact with our customers and partners are very important to us.

Do you have questions about our products, would you like an offer or do you need help planning your exhaust project?

Get in touch, we'd be happy to advise you!

Company