Centrotherm InnoFlue® Flex B-Vent Kits

The InnoFlue® Flex B-Vent Kit is a complete, reliable solution for upgrading or retrofitting an existing B-vent system. Each kit includes all components needed to reline a B-vent pipe, from the universal termination to the base support, making it easier than ever to enhance safety, efficiency, and code compliance in gas-venting installations.

Built with a flexible liner for fast installation, this system eliminates the need for major construction work or additional wall and roof penetrations. Lightweight yet durable, it is rated to 230°F (110°C) and engineered to improve the performance of gas vent pipes serving furnaces, boilers, and water heaters.

Key Features

• All-in-One Venting Kit: Includes flexible vent pipe, termination cap, base support, flex end pipe, spacers, rings, and lubricant.
• Simple Installation: No adhesives, primers, or solvents required, just fit, secure, and vent.
• Durable + Lightweight Design: Rated to 230°F (110°C) and evaluated to UL1738 and ULC-S636 by ICC.
• Ideal for Retrofits: Perfect for relining and upgrading existing double-wall B-vent systems without extra penetrations.
• Safe & Efficient Venting: Designed for proper exhaust flow for high-performing gas appliances.

Applications

• Relining and upgrading existing B-vent pipe systems for improved reliability and longevity
• Maintaining proper venting performance for gas-fired appliances such as furnaces, water heaters, and boilers
• Protecting vent terminations with a high-quality roof vent cap / water heater vent cap / furnace vent cap to keep out debris, animals, and weather

Why choose InnoFlue® Flex B-Vent Kits?

• All-in-One Solution: Every component required for a complete B vent installation is included.
• Time-Saving: Flexible design and pre-packaged components allow for faster installation.
• High-Quality Materials: Rated to UL standards and tested to ensure reliability and durability.
• Versatile: Compatible with a wide variety of B vent pipe systems and gas appliances.
• Safe and Efficient: Ensures proper airflow and protects homes from exhaust gases.

Frequently Asked Questions

What is a B vent kit?

A B-vent kit includes all components needed to safely reline an existing B-vent chimney or flue vent, including the flexible pipe, base support, and vent cap.

How does the InnoFlue® Flex B-vent pipe work?

The flexible liner slides inside your existing double-wall vent pipe and acts as a new sealed pathway to carry exhaust gases from the appliance to the termination point.

Why is a B vent cap included in the kit?

The B-vent cap or roof vent pipe cap prevents rain, debris, and animals from entering the system, ensuring safe airflow and long-term vent reliability