Research

Impact of Chimney-Top Appurtenances on Flue Gas Flow

The NFPA 211, Standard for Chimneys, Fireplaces, Vents, and Solid Fuel-Burning Appliances, Technical Committee would like to provide clearer guidance for installing rain caps and other chimney-top devices but lacks technical substantiation to generate such guidance.

Research Goal: The objective of this project is to gather published research on flow resistance of chimney-top devices such as rain caps, exhaust terminations, chimney-top dampers, and decorative shrouds with a focus on venting systems serving solid-fuel burning appliances, particularly open fireplaces.

Download the project summary. (PDF, 335 KB)

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NFPA 211: Standard for Chimneys, Fireplaces, Vents, and Solid Fuel-Burning Appliances, 2013 Edition
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