Corr/Guard®  3"- 5"

Single and Double-Wall Positive Pressure Special Gas Vent engineered for venting today’s high efficiency natural gas-burning or propane fired appliances, categories II, III and IV as defined by the Standard for Gas-Fired Central Furnaces, ANSI Z21.47 and NFPA 54.

Applicable Standards
  • ANSI Z223.1/NFPA 54

    National Fuel Gas Code

  • ANSI/CSA Z21.47/CSA 2.3

    Gas-fired central furnaces, same as CSA 2.3

  • ANSI/NFPA 54

    National Fuel Gas Code

  • ANSI/UL 1738

    Standard for Venting Systems for Gas-Burning Appliances, Categories II, III, and IV

  • NFPA 54

    National Fuel Gas Code

  • ULC 636

    Standard for Type BH Gas Venting Systems

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