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OfflineCapnZ
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Has anyone ever used an air purifier for a flow hood?
    #24011402 - 01/15/17 07:28 AM (7 years, 1 month ago)

So I've been looking into building a flow hood and ran across a few out of the box HEPA air purifiers in the $150-200 range that look interesting. According to the specs true HEPA filtering removes 99.7 % particulates including mold spores and bacteria. Rated at 350-500 sq ft - a room sized filter with 4 diff fan speeds, 4 stage filtering and a washable long use HEPA filter. By the time I build one I've spent almost that much and this is ready out of the box. Thoughts??


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OfflineTheCyndicate
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Re: Has anyone ever used an air purifier for a flow hood? [Re: CapnZ]
    #24011409 - 01/15/17 07:35 AM (7 years, 1 month ago)

No that HEPA setup does not produce enough static pressure to produce laminar flow.

Cyn

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OfflineCapnZ
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Re: Has anyone ever used an air purifier for a flow hood? [Re: TheCyndicate]
    #24011414 - 01/15/17 07:40 AM (7 years, 1 month ago)

Yeah that was a concern but I have never seen one of these operate so was not sure how much pressure they produced. Thanks!


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OfflineAxn
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Re: Has anyone ever used an air purifier for a flow hood? [Re: CapnZ]
    #24011433 - 01/15/17 07:51 AM (7 years, 1 month ago)

IMHO the blowers of the air cleaners are on wrong side of the filter (out going). More than likely the motor setup is molded into the air cleaner case so no re-configuring. most blower motors are weak = low CFM or a hard time overcoming static pressure.  The filter to cabinet seal is usually not that great they are cleaning the air not the clean room device for lab work.

      My opinion based off of the 20+ HVAC yrs. of working with a chemical lab's clean room (positive pressure room ,hoods, design, installation and maintenance of).

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OfflineCapnZ
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Re: Has anyone ever used an air purifier for a flow hood? [Re: Axn]
    #24011451 - 01/15/17 08:04 AM (7 years, 1 month ago)

Ok thanks AXN. Looks like I'm building one!


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