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Thread: 13 seer Eff...

  1. #1
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    13 seer Eff...

    I wondering if the 13 seer units remove more humidity than 10 seer units because of their larger evaporator coils?

  2. #2
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    More than 10 SEER or less?

  3. #3
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    Usually 13 SEER remove a little less moisture, because the coil is slightly warmer.
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  4. #4
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    You'd need to do some research of detailed cooling capacities,for each SEER.

    13 may be less in many cases,but likely not much,or easily offset by lowering the cfms.

  5. #5
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    does a TXV on a 13 seer system help at all

  6. #6
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    Quote Originally Posted by jmiles View Post
    does a TXV on a 13 seer system help at all
    LOL I bet this gets several different answers...

  7. #7
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    Some matches only get 13 SEER rating with a TXV.
    Makes it a mute point on those matches.
    The brands that get 13 SEER with a piston, the TXV should help some.
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  8. #8
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    Quote Originally Posted by BigJon3475 View Post
    LOL I bet this gets several different answers...
    LOL... You still remember that other thread in tech forum. huh.

    I should go talk to dawgcatcher about runniing that test also.
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  9. #9
    Join Date
    May 2006
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    east central indiana
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    Originally posted by jmiles
    does a TXV on a 13 seer system help at all
    Help what? To dehumidify? I would say yes under higher load conditions, but a negligable difference under normal conditions... whatever "normal" means.
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  10. #10
    Join Date
    Feb 2007
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    Quote Originally Posted by jmiles View Post
    I wondering if the 13 seer units remove more humidity than 10 seer units because of their larger evaporator coils?
    Generally a larger coil means less Dehumidification. in the past Manufacturers have cheated this to get a higher SEER.

    The real question is why you are asking. if you are lookingfor a new system and dehumidification is a concern then spend mor on a variable speed blower instead of extra seer

  11. #11
    Join Date
    May 2000
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    I've looked at a lot of brands and models. The SHR varies. Some, like Rheem & Trane with TXV coils run a SHR around .70 or .71. Others, especially with piston coils, run .75 or more. That's 2-3 less gallons of water out of the air on the average day. As dash says, if you have a problem you can lower the airflow.

    As a general rule larger coils run a tad warmer so dehumidify less. We've pretty much gone to always using TXVs even on one brand we sell that ARI rates 13 without them. The SHR published is at 95 out, on a mild day, a piston coil can run a pretty high superheat meaning a good chunk of the coil may be above dewpoint and not dehumidifying.

  12. #12
    Join Date
    Jun 2001
    Location
    Louisville, KY
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    12,150
    The system selected should have a SHR that matches the needs of the home.
    Perhaps you should have read the instructions before calling.

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