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-   -   Sears 600 Wall Furnace Manual/ HEATING Efficiency (https://www.askmehelpdesk.com/showthread.php?t=810817)

  • Apr 21, 2015, 06:14 AM
    MontyLaurie
    Sears 600 Wall Furnace Manual/ HEATING Efficiency
    Do you know the gas heating efficiency percentage rating
  • Apr 21, 2015, 11:33 AM
    ballengerb1
    QWe would need the model number, usually starts with 867XXXXX
  • Apr 21, 2015, 12:25 PM
    ma0641
    That heater is at least 40 years old, obsolete for parts. Maybe 60% efficiency back then.

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