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HS-AIS — Attic Insulation Shield

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-AIS — Attic Insulation Shield


The attic insulation shield is required in unoccupied attic areas to prevent insulation material from infringing on the 2-inch airspace clearance.AV_pg4 AV HS-AIS Attic Ins Shield prod dim

Available sizes (inches)

Part No.SizeAB