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    effex1's Avatar
    effex1 Posts: 1, Reputation: 1
    New Member
    		  
    #1

    May 20, 2009, 04:55 PM
    Replacing a 3 ton 10 seer AC with a 3.5 ton 10 seer
    Can I use the existing evaporator or would I need to replace the evaporator coil


    How about using a 4 ton 10 seer unit
    mygirlsdad77's Avatar
    mygirlsdad77 Posts: 5,713, Reputation: 339
    Plumbing Expert
    		  
    #2

    May 20, 2009, 05:12 PM

    You can keep the existing a-coil if you size the orafice correctly, or have a txv valve. However, it is best practice to have the a-coil and condernser matched. I would also suggest having a minimum 13 seer installed(coil and condenser), as ten seers is a thing of the past.
    dac122's Avatar
    dac122 Posts: 463, Reputation: 17
    Full Member
    		  
    #3

    May 20, 2009, 07:03 PM

    Just curious why are you up-sizing the outdoor unit? I also agree you should jump to a 13 SEER unit.
    wmproop's Avatar
    wmproop Posts: 3,749, Reputation: 91
    Ultra Member
    		  
    #4

    May 20, 2009, 08:23 PM
    I`m guessing you are replacing the 3 ton with a used 3.5 ton condenser,, around my state there are no more new 10 seers units to be had
    If this is the case you won`t have a warranty to worry about,because the condenser and evap coil don`t match
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