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Offlinelasting4ability
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Registered: 06/10/06
Posts: 2
Last seen: 17 years, 7 months
cfm ?
    #5766538 - 06/19/06 01:43 AM (17 years, 7 months ago)

got two large squirl blower fans out of two old furnaces. But i cant tell what cfm they are. they are big i think like 800 cfm or something. Question is can you have to much air flow through hepa rendering usless? Or is there only such thing as not enough air ?


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OfflineRogerRabbitM
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Registered: 03/26/03
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Re: cfm ? [Re: lasting4ability]
    #5766878 - 06/19/06 05:07 AM (17 years, 7 months ago)

When you hold a bic cigarette lighter in front of the HEPA, it should bend the flame between 45 and 90 degrees, but not blow it out. If you have too much flow, you can easily block off part of the intake to the fan. This will also reduce current flow on the motor because less air is being moved. Another, but more expensive way to reduce flow is to use a motor speed controller, not a lighting dimmer on the motor itself.
RR


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