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  1. #1
    Join Date
    Apr 2017
    Location
    Massachusetts
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    12
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    Which one is more efficient?

    Is High Velocity more efficient than conventional system?

  2. #2
    Join Date
    May 2000
    Location
    Indianapolis, IN, USA
    Posts
    39,061
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    If you look at SEER ratings, high velocity kills them. That's why they got a loophole around the 13 SEER minimum. There can be cases of a "16 SEER" or higher outdoor unit (matching indoor) that only gets 12 or 13 SEER with a Space Pak or Unico. Also watch capacity, usually end up losing about 1/2 a ton. An 036 might be rated at 30K with a HV air handler.

  3. #3
    Join Date
    Sep 2007
    Location
    State College, PA
    Posts
    1,987
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    Not quite an answer but...

    The problem I have seen with high velocity is that it does not do well to get rid of humidity. Others may have different experience in different areas of the country.
    Can someone please explain to me -
    Why is there never enough time to do it right the first time, but plenty of time to do it twice?


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  4. #4
    Join Date
    Aug 2001
    Location
    Pavilion, NY
    Posts
    3,241
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    Quote Originally Posted by joemach View Post
    Not quite an answer but...

    The problem I have seen with high velocity is that it does not do well to get rid of humidity. Others may have different experience in different areas of the country.
    Most systems run about 300cfm/ton and from my experience it is just the opposite, they have far more latent removal and less sensible

    'The more you know, the more you realize you don't know'
    ...

  5. #5
    Join Date
    Mar 2007
    Location
    Myrtle Beach, SC
    Posts
    2,967
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    When 10 SEER was the norm, high velocity systems only got 9 SEER. When the minimum SEER went to 13, high velocity would only do 10 to 12 SEER. Capacity is almost always lower too. But sometimes there is no room for normal sized ducts, so high velocity is all that you can use. But standard systems are almost always better performing than high velocity systems.
    Remember, Air Conditioning begins with AIR.

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