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  1. #1
    Join Date
    Mar 2020
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    1
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    2.5 single or 3t 2 stage?

    This question is very similar to a question below but.

    Im now looking to replace. Manual J has my 1400sf home (Dallas TX) at 2.38. I am replacing a 3t unit that has always been too large.
    The price differences between a 2.5 Single stage vs a 3T 2 Stage is fine with me if it will run longer and dehumidify.
    Is this a good candidate for the 3T, 2 stage? The ducting is on the edge of 1200cfm. A return would need to be added.
    I dont mind spending he money if this will help with humidity in the spring and deal with the 108F temps in the summer, but dont want to spend more and still have issues.
    Im guessing a 3t 2 stage should be designed for a 3ton home, but the 1 ton increments tend to screw that.
    Do the r410 systems do a better/worse job at removing humidity? Or approx the same?

  2. #2
    Join Date
    Aug 2002
    Location
    Southold, NY
    Posts
    27,162
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    2-ton with a whole house dehumidifier!

  3. #3
    Join Date
    Nov 2006
    Location
    Athens, Ohio
    Posts
    7,288
    Post Likes
    Quote Originally Posted by pecmsg View Post
    2-ton with a whole house dehumidifier!
    Does Dallas have humidity?
    I love our dehumidifier in our green grass area in Ohio.
    AOP Rules: Rules For Equipment Owners.

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    Questions should end with a question mark "?" Statements end with a period "."

  4. #4
    Join Date
    Nov 2004
    Location
    SW FL
    Posts
    9,969
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    Quote Originally Posted by yesterday View Post

    This question is very similar to a question below but.
    I'm now looking to replace.

    Manual J has my 1400sf home (Dallas TX) at 2.38.
    I am replacing a 3t unit that has always been too large.
    The price differences between a 2.5 Single stage vs a 3T 2 Stage is fine with me if it will run longer and dehumidify.

    Is this a good candidate for the 3T, 2 stage?

    The ducting is on the edge of 1200 cfm.
    A return would need to be added.

    I dont mind spending he money if this will help with humidity in the spring
    and deal with the 108F temps in the summer, but don't want to spend more and still have issues.

    Im guessing a 3t 2 stage should be designed for a 3ton home, but the 1 ton increments tend to screw that.
    Do the r410 systems do a better/worse job at removing humidity? Or approx the same?
    Two stage system Will run longer and dehumidify
    IF it is sized appropriately and air flow is set accurately.

    I would not take someone else's calculation at face value
    given 2.38 and Your situation / locale.

    Q. Sensible _ _, _ _ _ BTU/HR
    S.H.R. ___ 0. _ _
    DeRate at 110'F ________

    Age of house __ / Built 1999 or ___

    Windows: _S.H.G.C. 0._ _ [ < 0.29 ?]
    Glass Area: ___ Sq Feet

    Infiltration: 0._ _ A.C.H. Natural

    ASHRAE 1%
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    74.5'F WB ______ R.H. 31.9%

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    My Gmail address: racingdan11
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