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  1. #1
    Join Date
    May 2019
    Posts
    8
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    replacing 2.5 ton central with mitsubishi multi position

    i want to replace 2.5 ton central ac unit with 3 ton Mitsubishi heat pump.my only problem is that existing system have 1000-1200cfm and mitsubishi multi position air handler 767-910cfm .. the house is only 1200sqf one floor. Never install Mitsubishi ducted air handler so i dont know how does it work, end if its going to be strong enough,or i should just go by tonnage and count on Mitsubishi design engineers. please any suggestions??thank you.

  2. #2
    Join Date
    Aug 2002
    Location
    Southold, NY
    Posts
    23,030
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    Doesn’t 3-Tons seem large?

  3. #3
    Join Date
    May 2019
    Posts
    8
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    Thread Starter
    well. i was thinking about 30k btu but its cfm its even lower.do you suggest to just go by tonnage and to not worry about blowers cfm??? than you so much..

  4. #4
    Join Date
    Aug 2002
    Location
    Southold, NY
    Posts
    23,030
    Post Likes
    No I suggest you do things in order

    Manual “J” for proper sizing
    Manual “D” to match the Ducts to the unit!

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