Phone: +1 678-388-2740

    Double wall stainless steel exhaust systems

    Chimneys made of stainless steel with high quality insulation material, available in different designs, materials and colors.


    All-In-One Exhaust, Chimney or Vent

    System features



    DWFL – Double Wall Flanged Joint

    Inner Material

    Inner liner made of high-grade 444 stainless steel

    Outer Jacket Material

    Outer jacket made of 304 stainless steel

    Wall thickness


    5” through 36” = 0.035” thick



    5” through 24” = 0.025” thick

    26” through 36” = 0.035” thick


    Inner diameter

    6'' - 36'' I.D. 


    1.25” Air


    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

    Main features

    • Extremely rugged and made of all-stainless with 25-year 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 condensing and noncondensing appliances, engine and CHP exhaust piping, kitchen exhaust ducts, fireplace chimneys, dryer vents, fume venting, oven and process stacks, paint booth exhaust.


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

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

      25 years warranty!