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natural gas

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  • #20243
    imported_nikkilucy
    Participant

      natural gas Furnace 2 yrs old. i can smell gas outside at the vent when it is running. is this normal?

      #21907
      imported_tomd7735
      Participant

        If you are referring to a high efficiency furnace, the flue is a 2-2 1/2″ plastic pipe. The smell of gas there indicates incomplete combustion. This would cause a higher bill. It would be best to call for service. It may need cleaning of the secondary heat exchanger; especially if the filter doesn't get changed often. Or there could be a problem with the combustion air blower…
        Tom D. HVAC Mech.  ;D

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