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InvisibleCLuB99
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About HEPA filters
    #345276 - 06/20/01 11:45 PM (21 years, 3 months ago)

Hi folks...
i'm going to buy an hepa filter from filtersrx.com, metal frame 99.99% efficiency.
the specifications of this filter says:
rated airflow (SCFM): 300
Initial resistance (W.G.): 1.0
so to use this filter in a LFH i need at least a blower with 300 cfm or i need/ i'm missing something else???

thanks

HSM924125 24x12x5-7/8 300 1.0

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OfflineAnnoA
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Re: About HEPA filters [Re: CLuB99]
    #345686 - 06/21/01 09:30 AM (21 years, 3 months ago)

According to stamets the optimum air velocity coming from the filter is 100 feet per minute.
Your filter measures 1ft x 2 ft.
This means that you need a blower that delivers 200 cft/min(5,663 m^3/min) against a static pressure of 1 foot water gauge( that would be 30 mb)
Stamets also recomends using a slightly more powerfull blower, which speed you can adjust.

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OfflineAnnoA
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Re: About HEPA filters [Re: Anno]
    #345693 - 06/21/01 09:36 AM (21 years, 3 months ago)

If you are going to built a glove box like thing to house your flter( with an opening in front, without thw gloves), then you will certainly need less speed.

A pic of my hood:


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OfflineAnnoA
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Re: About HEPA filters [Re: CLuB99]
    #345699 - 06/21/01 09:47 AM (21 years, 3 months ago)

Can you buy a filter at this company at all if you?re not in the USA?

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InvisibleCLuB99
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Re: About HEPA filters [Re: Anno]
    #345849 - 06/21/01 05:42 PM (21 years, 3 months ago)

they say yes....as i'm in mexico.....but they are soooo slow to reply emails.....
thanks anno :smile:

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