Metal-Fab 4" Diameter x 35' Length Flex Aluminum Chimney Economy Liner Kit

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Metal-Fab provides complete and comprehensive venting solutions to the HVAC, Hearth and Plumbing markets.  Founded in 1958 on the premise that offering better products and services would be the key to our success.

Metal-Fab continues to operate today as a privately held entity with the same core values that lead to success while creating steady, stable growth over the past six decades.

Customer needs are the highest priority at Metal-Fab that is why every customer receives a unique experience while choosing from a full line of high-quality venting products for commercial, residential and industrial applications. 

Cutting-edge manufacturing systems, innovative designs, patent products, unmatched product quality, and a focus for detail have resulted in a leadership position within the industries Metal-Fab serves.  Our constant product improvement process and experience in developing and engineer products for safe, efficient appliance operation sets Metal-Fab apart from the competition.


Flexible Aluminum Chimney Liners intended for field-installation into new or existing tile-lined or unlined masonry chimneys, venting natural active Category I gas-fired appliances which burn natural gas or propane.  Chimney liners are intended to be installed in accordance with the “Standard for Chimneys, Fireplaces, Vents, and Solid Fuel Burning Appliances,” NFPA 211; “National Fuel Gas Code,” NFPA 54/ANSI Z223.1 or Canada, CAN-B149.1.

Flexible Aluminum Chimney Liners are tested and listed to UL 1777 and ULC –S635 for approved new or existing masonry relining chimney applications.  Flexible aluminum liners are manufactured from a durable aluminum alloy, ensuring maximum flexibility and strength.


  • Available in 25' and 35' sizes.
  • Also available in 3", 4", 5", 5.5", and 6" Diameter.
  • Pre-drilled holes in each sleeve for field attachment of pull bar
  • Sleeve and cap attachment hardware included
  • Do-it-yourself economy

Kit Includes:

  • Specified length of 2-ply aluminum flex
  • Vent cap
  • Lightweight aluminum flashing
  • Mortar guard w/label
  • Attachment hardware package
  • Instructions


For use with Category-1 gas-fired furnaces, fireplaces, water heaters, wall heaters, etc.
Clearances See Installation Instructions
Listing Standard NFPA 211
UL 1777
ULC – S635
Flue Material Specifications: double ply aluminum alloy; .0055 thick each layer.


WARNING: Proposition 65