National Chimney db335kit 3x35 Ft Aluminum Chimney Liner Kit

Product Description

The NATIONAL CHIMNEY db335kit is a flexible aluminum chimney liner kit measuring 3 inches in diameter and 35 feet in length. Chimney liner kits of this type are used to reline or restore the flue of a chimney, providing a properly sized and continuous passageway for combustion gases to vent safely to the outside. This kit is suited for gas appliance venting applications where a flexible liner is needed to navigate offsets or bends within an existing masonry or factory-built chimney. Installation is typically performed by a licensed chimney professional or HVAC technician.

This liner kit is designed for use with gas-fired appliances such as furnaces, boilers, or water heaters that require a 3-inch flue connection. The 35-foot length accommodates single- and two-story residential chimneys with moderate height. The flexible construction allows the liner to be routed through chimneys that are not perfectly straight, making it practical for retrofit and replacement work in existing homes.

Key Features

• Flexible aluminum construction allows installation through offset or non-straight flue passages
• 3-inch diameter sized for gas appliance venting requirements
• 35-foot length suitable for single- and two-story residential chimney heights
• Kit format provides components needed for a complete liner installation
• Designed for gas appliance venting applications such as furnaces, boilers, and water heaters

Compatibility

Designed as an OEM-style replacement or retrofit liner for residential chimneys requiring a 3-inch flexible aluminum flue liner for gas appliance venting.

Installation Notes

Chimney liner installation should be performed by a qualified chimney sweep, HVAC technician, or contractor familiar with local building codes and NFPA 211 standards. Before beginning work, ensure the appliance is off and the flue is cool. The liner must be properly terminated at both the top and bottom of the chimney with approved fittings, and all connections should be secured and sealed according to manufacturer instructions. Always verify local code requirements for liner material approval before installation.

Technical Specifications

• Diameter: 3 inches
• Length: 35 feet
• Material: Aluminum
• Application: Gas appliance chimney flue lining

Standard Information

• Brand: NATIONAL CHIMNEY
• Manufacturer Part Number: db335kit