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RFS — Firestop Spacer

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.

How to Purchase

Vent FAQs

RFS — Firestop Spacer


Submittal Data (48 KB, PDF)
  • Fits 2" x 6" wall.
  • Available in 4" only.
  • For other firestops, see installation instructionsHC_RFS_drw