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  1. #27
    Join Date
    Jun 2001
    Location
    Moore, Oklahoma, United States
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    4,296
    As long as they allow "replacement part" R22 condensers the minimum EER of new systems is meaningless. Dry condensers account for about 1/2 of all AC sales at the local supply house. Without airflow testing, "box" EER is also meaningless.

    If Energy Star wanted to make a real difference they could limit the tons per sqft for each area. Then again, have government programs ever really fixed anything?

  2. #28
    Join Date
    Mar 2012
    Location
    Gilbert, Arizona, United States
    Posts
    45
    Quote Originally Posted by 54regcab View Post

    If Energy Star wanted to make a real difference they could limit the tons per sqft for each area. Then again, have government programs ever really fixed anything?
    Well, Energy Star is a certification for energy efficiency, and not everyone is required to follow it, unlike the minimum federal standards set by the U.S. DOE. Proper sizing would be worthy of consideration for the Energy Star program, however, it would be too difficult to enforce if such requirements were included in the minimum federal standards.

  3. #29
    Join Date
    Jun 2013
    Location
    Austin, TX
    Posts
    641
    Evaporative condensers (AKA "hybrid air conditioning") would make an awful lot of sense in dry climates like Arizona. As energy costs increase, the extra maintenance costs can be well justified even in residential applications.

  4. #30
    Join Date
    Jan 2004
    Location
    Lancaster PA
    Posts
    68,119
    Quote Originally Posted by NiHaoMike View Post
    Evaporative condensers (AKA "hybrid air conditioning") would make an awful lot of sense in dry climates like Arizona.
    Swamp cooler.
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  5. #31
    Join Date
    Jun 2001
    Location
    Moore, Oklahoma, United States
    Posts
    4,296
    Or is he talking about something like the freus?
    Want to REALLY save energy? Tighten up the house/ductwork and downsize the HVAC system. Smaller units keep stable temps, dehumidify better, run quieter in addition to using less power.

  6. #32
    Join Date
    Jan 2004
    Location
    Lancaster PA
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    68,119
    Quote Originally Posted by 54regcab View Post
    Or is he talking about something like the freus?
    Don't know for sure what he is talking about. but in dry climates, a swamp cooler is often far better, and is also more efficient then a vapor compression unit.
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  7. #33
    Join Date
    Jun 2013
    Location
    Austin, TX
    Posts
    641
    I'm referring to a scaled down version of the cooling towers often used on large chillers. It's mostly for climates that are relatively dry but where a plain evaporative cooler isn't enough.

  8. #34
    Join Date
    Jun 2001
    Location
    Moore, Oklahoma, United States
    Posts
    4,296
    Quote Originally Posted by NiHaoMike View Post
    I'm referring to a scaled down version of the cooling towers often used on large chillers. It's mostly for climates that are relatively dry but where a plain evaporative cooler isn't enough.
    http://www.freus.com/
    It's the only residential condenser I've seen that's water cooled. Hasn’t done well due to maintenance issues.

  9. #35
    Join Date
    Jan 2004
    Location
    Lancaster PA
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    68,119
    Quote Originally Posted by 54regcab View Post
    http://www.freus.com/
    It's the only residential condenser I've seen that's water cooled. Hasn’t done well due to maintenance issues.
    Be better off adding a desuperheater/HRU to a standard air to air A/C.
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