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-   -   Day and night furnace model numbers (https://www.askmehelpdesk.com/showthread.php?t=766428)

  • Sep 9, 2013, 11:38 AM
    robertmellis
    Day and night furnace model numbers
    I'm trying to find age of my unit. Model 100 u 19A SN LEGGA 45914
  • Sep 9, 2013, 03:29 PM
    ma0641
    They used any number of formats. My guess would be August 1959.

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