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Lennox HP19-511-1P

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bayoudonnie
bayoudonnie Member Posts: 1
in A-C, Heat Pumps & Refrigeration
This is a 1989 unit that finally bit the dust. It has served us well but it’s time for a new one. I believe it’s a 4 ton but I don’t know the BTUs of the system. I would like to get the equivalent of what we had. Any help would be appreciated 

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  • pecmsg
    pecmsg Member Posts: 4,866
    edited September 2023
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    Get an accurate heat load loss performed. 
    Has the duct static pressure been tested?

    most systems I see are oversized on undersized ducts. 

    When hot and humid how often did it cycle?
    mattmia2
  • JUGHNE
    JUGHNE Member Posts: 11,063
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    Lennox manual indicated the 511 having a max output of 4 tons.

    Being installed in 1989 it is most likely oversized.

    And under ducted as stated above.

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