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.


    Reduced Clearance Grease Duct

    System features



    Double Wall Commercial Kitchen Exhaust



    Made of all stainless steel (both inner and outer jacket)

    All supports and accessories are stainless steel


    Wall thickness

    Thickness per UL-1978 Listing

    Inner diameter

    6-36 inch
    (use Model DWFL+1 for diameters 38” through 48”)


    1.5” thick ceramic fiber insulation compressed into a 1.25" thick space


    2.2” overlapping joint with Patent-Pending light weight technology and a double female socket permitting fastest alignment/installation on the market

    Locking band

    Attached to each part

    Main features

    • Only 1/16 inch per foot slope is required
    • Factory CAD designs for installation ease
    • All lengths are field cutable for maximum flexibility
    • 100% stainless steel with Limited Lifetime Warranty
    • Smooth flow and known resistance for perfected factory pressure calculations


      Stainless steel duct for connecting cooking appliances and kitchen hoods to the outdoors under negative or positive pressure. Design eliminates welding, second insulation trade, and lengthy inspections in the field. Provides UL/ULC Listed and Certified exhaust solutions.

      UL Listings (and ULC)

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


      UL-103 Standard, Building Heating Appliance Chimney (ULC/ORD-C959 Industrial Type 540°C Chimney)


      UL-103 Standard, Additional Type HT Listing


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


      Additional UL/ULC 20" W.C. Pressure Listing 


      25 years warranty!