matching the ideal Hepa filter with a 465CFM blower

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ghostdad
pudding

Registered: 10/28/11
Posts: 126
Loc: ATLANTIS
Last seen: 2 years, 1 month

matching the ideal Hepa filter with a 465CFM blower

#15994975 - 03/25/12 04:52 PM (14 years, 4 months ago)

To help take my sterile environments to the next level of seriousness I'm starting a Laminar flow hood project.
This may be putting the cart before the horse, but I recently acquired a 465CFM squirrel cage blower fan for a decent price.

I understand the basic math based on the assumption that the desired end result output from the filter is roughly 100CFM.
I know that a 24X24 filter would require a basic 400CFM..which the blower should do fine with.
My concern/worry is the calculation of the other variables like pressure drop and impedance of a pre-filter.

so lets say I have 3 possible HEPA filters I could buy
A) 24X24X12 rated: 1900 CFM

B) 18x24x11.5 no extra stats

C) 15X15X6 rated: 462 CFM @ 1.0 WG (PRESSURE DROP: 0.22WG @ 90FPM)

oddly enough each can be found within $20 of each other
assuming the same quality of materials and efficiency, which would be most suitable?
I do not plan on using any type of rheostat to dial down the motor below its recommended native speed.

wish me luck trying to remember old shop class skills when I try to construct the box.

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bakenast
Muffen Stuffer

Registered: 03/14/11
Posts: 924
Last seen: 2 years, 10 days

Re: matching the ideal Hepa filter with a 465CFM blower

[Re: ghostdad]
#15995100 - 03/25/12 05:28 PM (14 years, 4 months ago)

you wont want a or b A: is rated at 1900 CFM wayy to high B: with thickness is probably the same C: is the best bet but a little small with a 465 cfm blower it should be good for a 12x24 filter but it will depend on the perormance of it a Static pressure of the Filter, but 465 CFM is small for a 24x24 filter,,

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