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3 in. x 4 in. B-Vent Increaser

3 in. x 4 in. B-Vent Increaser

Article Number:
  • $ 1374


1 in. minimum clearance from combustible materials . Use with gas or propane burning appliances only . Maximum temperature of flue gas 470°F . Use with factory supports and fire-stop spacers . UL listed . Consult your local building codes for approved installation practices

Increaser for Class B gas appliance venting system. The increaser is made of Galvalume steel a combination of aluminum and galvanized steel that provides enhanced durability and lifespan. Use from appliance to above roof penetration extension.

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