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  1. 12-13-2012, 03:32 AM #1
    Hasny
    Hasny is offline Regular Guest
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    Built in sound attenuators in AHU

    Are there any such AHUs avialable which have built in sound attenuators. Meaning inside the AHU body, immediately after the blower fan...there is sound attenuators. Thanksj
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  2. 12-27-2012, 09:07 PM #2
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    Shophound
    Shophound is offline Professional Member*
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    Fanwall AHU systems do this. The sound attenuation is inside each fan cube. We are about to install this where I work, meaning we can remove the attenuators in the supply plenum.
    Building Physics Rule #1: Hot flows to cold.


    Building Physics Rule #2:     Higher air pressure moves toward lower air pressure


    Building Physics Rule #3:     Higher moisture concentration moves toward lower moisture concentration.
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  3. 12-28-2012, 01:12 PM #3
    Jarreau
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    Yes, but most all would be custom manufactured units. What CFM range are you looking for?


    J
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  4. 12-29-2012, 12:27 AM #4
    Hasny
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    I have looked few catalogs, Carrier, Trane for instance but don't find any attenuators inside the AHU.
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  5. 12-29-2012, 12:32 AM #5
    Hasny
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    @jerreau
    It is 18000cfm AHU and I have been installing attenuators in my previous designs in the supply air ducts. Looks like you are right, these are mostly customized built AHUs which have attenuators inside. Just curious how and where ther are located, must be i impacting the Overall static as well. Would be great if someone could share a sketch or pic of the same.
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  6. 01-05-2013, 06:56 PM #6
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    Shophound
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    Quote Originally Posted by Hasny View Post
    I have looked few catalogs, Carrier, Trane for instance but don't find any attenuators inside the AHU.
    Look at Temtrol line. And consider again the Fanwall technology...attenuators are right at each blower, not in the duct.
    Building Physics Rule #1: Hot flows to cold.


    Building Physics Rule #2:     Higher air pressure moves toward lower air pressure


    Building Physics Rule #3:     Higher moisture concentration moves toward lower moisture concentration.
    Reply With Quote Reply With Quote
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