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HS-FSA — Firestop Assembly

How to Specify

Using tables from the National Fuel Gas Code or our Sizing & Application Guide, determine the diameter of venting required. The Sizing & Application Guide also offers tips on good design including multi-appliance system sizing and design. The System Design and Installation Guide is an additional resource.

HS-FSA — Firestop Assembly


A firestop is required at each floor level, except at ceiling support or roof support, in order to provide correct spacing to combustible materials as the chimney passes through a combustible floor.AV_pg4 AV HS-FSA Firestop Assembly prod dim

Available sizes (inches)

Part No.SizeABC