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  1. #53
    Join Date
    Jan 2013
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    69
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    Quote Originally Posted by ProperVenting View Post
    Very smart and sensible suggestion, indeed. The real question is, - are they produced / manufactured here in USA / Japan or Europe? So far, I saw only constant speed varieties from guys like Soler / Fantech, Greenheck..etc. I flatly refuse to buy anything from China, especially mechanical devices requiring high quality bearings and other hi quality important components.
    Hmm... after I posted I found That Greenheck actually makes one for Lab ventilation purposes, BTW, this is a link. Anything else I missed?

  2. #54
    Join Date
    Jul 2007
    Location
    Delaware
    Posts
    3,824
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    Dwyer Instruments will help you. This may not be an off the shelf item (It may be, don't know) I will look into this deeper. The "control section" area of this forum may be a better place to get some help. But, like I said, I'll look around for you.

    I have installed many Greenheck fans, nice stuff.
    Always here

  3. #55
    Join Date
    Jan 2013
    Posts
    69
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    Quote Originally Posted by energy star View Post
    Dwyer Instruments will help you. This may not be an off the shelf item (It may be, don't know) I have installed many Greenheck fans, nice stuff.
    I checked the Dwyer Instruments, Inc. WEB site, - they are specializing mostly in flow control & other related categories. I didn't see any fans on their site. Maybe they can refer me to proper mnufactures if I call them

  4. #56
    Join Date
    Jan 2004
    Location
    PA
    Posts
    69,995
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    Quote Originally Posted by ProperVenting View Post
    Gosh, this is devastating all the way from 3000 to 2000 CFM and u still insist to further attenuate the run by putting (2) 90degrees elbows, hence further increasing resistance?
    I was allowing for those ells.

    If you want 3,000 CFM, then you need to have a fan that can move 3,000 CFM at a static of .5". But that isn't what you bought.
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