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  1. #14
    Join Date
    Aug 2002
    Location
    Office and warehouse in both Crystal River & New Port Richey ,FL
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    18,836
    Originally posted by teigo
    Quick question regarding return duct for High velocity system. Can you have to much return air. Or is more return better to service as many rooms as possible with return duct work. Thanks

    M

    [Edited by dash on 10-30-2005 at 11:09 PM]

  2. #15
    Join Date
    Apr 2002
    Posts
    11,808
    Originally posted by dash
    Originally posted by teigo
    Quick question regarding return duct for High velocity system. Can you have to much return air. Or is more return better to service as many rooms as possible with return duct work. Thanks

    More returns equals more resistance in the duct system,which is fine if the ducts are sized properly.
    dash, just trying to follow what you are saying. You mean more returns as in more extensive return duct work, such as a return from all rooms but bathrooms/kitchen etc would mean more resistance?

    More resitance as opposed to 3 feet of duct to a central return grille?

    The way we build has a greater impact on our comfort, energy consumption and IAQ than any HVAC system we install.

    http://www.ductstrap.com/

  3. #16
    Join Date
    Aug 2002
    Location
    Office and warehouse in both Crystal River & New Port Richey ,FL
    Posts
    18,836
    I

    [Edited by dash on 10-30-2005 at 11:10 PM]

  4. #17
    Join Date
    Mar 2005
    Posts
    37
    The reason I ask is that I requested a return duct to the only room in the home that didn't have a return duct in it. I'm just not sure if you can have too much return air since it wasn't initially spec'd. The other three bedrooms are serviced by a separate High velocity unit and they all have return ducts although smaller sized.

  5. #18
    Join Date
    Jan 2004
    Location
    Lancaster PA
    Posts
    67,922
    Are they Unico, or Space Pak systems?
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  6. #19
    Join Date
    Mar 2005
    Posts
    37
    Unico,

  7. #20
    Join Date
    Jan 2004
    Location
    Lancaster PA
    Posts
    67,922
    If you have them add the return, make sure they check the static pressure in the supply, and adjust the static plate if need be.
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  8. #21
    Join Date
    Mar 2005
    Posts
    37
    I'm pretty sure that unit is 3 ton and has 18 supply ducts. I do have concerns with the supply duct work. The supply line go approx 30" than does a 180 over the airhandler to take a sharp 180 back the other way. Any concerns here. The work seems tight but the duct planning concerns me. The main supply line runs about 50 feet. Starts out 9" reduces to seven inches for about 20' of the fifty at a 90 degree angle.

  9. #22
    Join Date
    Jan 2004
    Location
    Lancaster PA
    Posts
    67,922
    Thats some what typical duct work for Unico systems.
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  10. #23
    Join Date
    Mar 2005
    Posts
    37
    Thanks, beenthere for your help

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