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TLCIS — 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.

TLCIS — Attic Insulation Shield

  • The attic insulation shield must be installed where the chimney enters the attic space in any installation.
  • Designed to keep insulation away from the chimney and to maintain the mandatory 2-inch clearance to combustibles.
  • Must be used when the chimney penetrates an unoccupied attic.
  • Not to be used for enclosed chimneys.

AV_TLCIS_Attic Insulation Shield

Available sizes (inches)

5TLCIS5"117 1/813
6TLCIS6"128 1/814
7TLCIS7"139 1/815
8TLCIS8"1410 1/816
10TLCIS10"1612 1/818
12TLCIS12"1814 1/820
14TLCIS14"2016 1/822