The DuraVent DuraChimney II 8" 30-Degree Firestop is a premium factory-built chimney system accessory designed to ensure safe fire protection and proper clearance in angled chimney installations. Ideal for wood-burning fireplaces, stoves, and solid-fuel venting systems, this firestop is part of the trusted DuraChimney II double-wall chimney system, offering a lightweight, unitized design that eliminates field assembly and supports faster, more efficient installation in residential and commercial applications. It is specifically engineered for 30-degree offset chimney runs where enhanced structural fire safety is required.

Built for performance and compliance, the 30-degree chimney firestop works within a double-wall, air-cooled chimney system that maintains cooler exterior temperatures while supporting a strong internal draft for efficient venting. The system allows for thermal expansion both radially and lengthwise under high heat conditions, ensuring long-term durability and safety. UL 103 listed, DuraChimney II is tested for continuous operation at 1000°F, one hour at 1400°F, and ten minutes at 1700°F, delivering reliable, code-compliant chimney fire protection and installation safety.

Features

• DuraVent DuraChimney II 8" 30-Degree Firestop – Advanced Chimney Safety Component: Designed for the DuraChimney II factory-built double-wall chimney system, ideal for wood-burning fireplaces, stoves, and solid-fuel venting applications.
• Specifically Engineered for 30-Degree Wall Penetrations: Built for use when the chimney passes through a wall at a 30° angle from vertical, ensuring proper alignment and safe installation in angled chimney configurations.
• Enhances Chimney Fire Safety Protection: Provides critical firestop functionality that helps maintain required clearances and improves chimney system fire safety and structural protection.
• Supports UL-Listed Chimney System Compliance: Helps maintain compliance with UL 103 listed chimney system standards, ensuring safe and code-approved installation performance.
• Improves Structural Stability in Offset Runs: Designed to support angled chimney runs while maintaining proper spacing and safe passage through building structures.
• Professional-Grade Chimney Installation Accessory: Compatible with DuraChimney II double-wall chimney systems, commonly used in residential and commercial chimney applications.

Specifications