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Invisiblebbox244
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Laminar Flow Hood Hepa Filter with Pre-Filter Question * 1
    #14570765 - 06/06/11 06:23 PM (12 years, 7 months ago)

I was doing some research the past couple of weeks regarding glass fiber HEPA filters and pre-filters for building my own laminar flow hood.  I recently received a quote from a manufacturer for the following HEPA filter and pre-filter:



HEPA Dimensions are 915mmX610mmX150mm.  3'x2'x6".
Pre-Filter dimensions are: 595mmX292mmX46mm.

Costs:  44.00 USD HEPA, 2.35 USD Pre-Filter For 100 Units.

The HEPA filter is 99.995% efficient at 0.3 microns, and is tested fully in accordance with NIOSH standards using high pressure/low pressure canister testing, and laser spec.  Approx. 300mg phosphate used in testing each unit as well.  The pre-filter is pp (PolyPropylene) fiber with a MERV8 rating,

I am thinking about getting some sample filters and am wondering if this is good enough for a decent laminar flow hood.  The HEPA filter holds 900g of dust so it'll have a long service life.  Plus, the initial resistance is less than 200 pascals, with nominal flow at 1500m^3/h.  Thats 883 cfm.  The prefilter handles the same airflow.

I have an adjustable blower which does about 1060cfm at 1.48f/s.

Is this sufficient for a good laminar flow hood?

I plan on tweaking a couple of different teks on the board so I get a good "laminar" flow, meaning that I will evenly distribute pressure across the backside of the HEPA filter.  Lemme know what you think, thanks.


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OfflineRogerRabbitM
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Re: Laminar Flow Hood Hepa Filter with Pre-Filter Question [Re: bbox244]
    #14571077 - 06/06/11 07:25 PM (12 years, 7 months ago)

That should work, but you can probably find a better pre-filter.  If you get a really good prefilter, your HEPA should last forever.  Mine is ten years old and I run it 6 to 8 hours a day, 7 days a week.  There's no loss of flow yet.
RR


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Invisiblebbox244
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Re: Laminar Flow Hood Hepa Filter with Pre-Filter Question [Re: RogerRabbit]
    #14571318 - 06/06/11 08:19 PM (12 years, 7 months ago)

Whats the MERV rating on your Pre-Filter?  Dust Spot is okay too, but a MERV rating would be great...  Thanks,


--------------------
.... Always curious, always looking for better ways, mind always wonders ....

TRUE HEPA Filtered Air Pumps TEK
Everything you need to know about tubs TEK
Fast Tub Dehydrator TEK


Extras: Filter Print Post Top
OfflineDavidB
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Re: Laminar Flow Hood Hepa Filter with Pre-Filter Question [Re: bbox244]
    #21296567 - 02/19/15 12:29 AM (8 years, 11 months ago)

I'm looking to purchase some filters as well.  Could you tell me who you are getting your filters from?


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InvisibleRickSanchezC137
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Re: Laminar Flow Hood Hepa Filter with Pre-Filter Question [Re: DavidB]
    #21296617 - 02/19/15 12:49 AM (8 years, 11 months ago)

Why did you bump this ...... i got so excited for cheap 3'x2' hepa


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