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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.


The durable, all stainless steel constructed cap is designed to minimize downdraft, and features its own spark arrestor and bird debris screen.AV_pg4 AV HS-RCS Cap prod dim

Available sizes (inches)

Part No.SizeABC
6HS-RCS6"6"12"11 1/4"
7HS-RCS7"7"14"11 1/4"
8HS-RCS8"8"14"11 1/4"
10FB-RC*10"10"23 1 /2"10"
10FB-SA Spark Arrestor

*without spark arrestor