National Chimney DB425KIT M-FLEX aluminum liner kit 4 inches x 25 feet for gas units

Product Description

The NATIONAL CHIMNEY DB425KIT is an M-FLEX aluminum liner kit designed for gas units with an A.F.U.E. of 83% or lower. This kit provides a complete venting solution, including a UL Listed and Tested 2-ply aluminum liner, an aluminum mortar collar, a 16"x 16" aluminum top plate with a 2" high collar, and an aluminum cap. It ensures proper and safe exhaust for compatible gas appliances.

• UL Listed and Tested 2-ply aluminum liner for durability and safety.
• Includes aluminum mortar collar for secure thimble connection.
• Features a 16"x 16" aluminum top plate with a 2" high collar.

Product Highlights

listed to UL441 standards.

Product Information

Standard Information

• Brand: NATIONAL CHIMNEY
• Manufacturer Part Number: DB425KIT

Technical Specifications

• Manufacturer Part Number: DB425KIT
• Brand: NATIONAL CHIMNEY
• Liner Diameter: 4"
• Liner Length: 25'
• Liner Material: 2-ply aluminum
• Application: Gas Units
• AFUE Compatibility: 83% or lower
• Top Plate Dimensions: 16" x 16"
• Top Plate Collar Height: 2"
• Certifications: UL441