Chimney Rain Cap Jeremias TN28080 — storm collar/terminal for 80 mm flue

The Jeremias Chimney Rain Cap TN28080 is a protective terminal designed for 80 mm circular flue systems. It covers the chimney outlet to prevent rain, leaves and other debris from entering the flue while permitting exhaust gases to escape freely. The rain cap also helps reduce the effect of downdrafts and preserves the internal condition of the flue pipe in residential and light commercial installations that require a compact, weather-resistant terminal.

Advantages

This terminal is constructed to fit standard 80 mm circular flue pipes, providing a secure cover that resists water ingress and minimizes blockages from external debris. Its design allows continuous exhaust flow with minimal airflow restriction and helps protect the chimney interior from weather-related wear. The product is compatible with common flue materials and can be installed with typical chimney fittings for a neat external finish.

Suitable for (tasks / use cases)

• Protecting domestic boiler and water heater flues with 80 mm diameter outlets
• Preventing rain and debris from entering venting systems in houses and small commercial premises
• Reducing downdraft issues on short or exposed chimney runs
• Finishing external flue terminations where a compact weather cap is needed

Key specifications

• Compatible flue diameter: 80 mm circular
• Function: rain cap / terminal for exhaust protection
• Intended installation: external chimney/flue outlet
• Primary benefits: prevents water ingress and debris, reduces downdraft
• Typical applications: residential boilers, water heaters, light commercial venting

How to use

Fit the rain cap onto the external 80 mm flue pipe using the appropriate connector or clamp for the flue material. Ensure the pipe end is clean and free of obstructions before installation. Position the terminal so it sits securely on the pipe with adequate sealing or mechanical fastenings as required by the flue manufacturer and local regulations. After installation, check that exhaust flow is unobstructed and that the cap is stable under wind and weather conditions.

Usage recommendations

Inspect the rain cap periodically for buildup of debris, corrosion or damage and clean or replace as needed. Follow the flue pipe manufacturer’s installation instructions and local building codes when fitting this terminal. For installations exposed to heavy weather or aggressive environments, consider additional fastening or protective measures specified for the flue system.