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OfflineLHFSHP
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Registered: 08/18/20
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Building my first flow hood
    #26885958 - 08/18/20 01:35 AM (3 years, 5 months ago)

Hi ! I'm trying to build my first flow hood, it's been a difficult task because my country is kinda limited in blower options. I'm trying to make a floow hood mosty for agar work and making prints and spore syringes.

So I was looking for a filter of 20x16 inches and had a hard time finding a right/cheap fan.So I thought: maybe I'm aiming to high and maybe a 12x12 inch filter size will be enough?. I was checking some more, and there is much more availability for Indoor extractors.



I think for a 12x12 inches filter I need the VK 200 model wich is (I think) just on the specs needed. (And still is like 110 dollars)

Anyone has any experience, or know if this kind of extractor/"blower" is any good for a flow hood or if I need a bigger or a smaller one?


THANKS !


Edited by LHFSHP (08/18/20 01:36 AM)


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InvisibleBsdgaou

Registered: 02/20/19
Posts: 340
Re: Building my first flow hood [Re: LHFSHP]
    #26887566 - 08/18/20 11:13 PM (3 years, 5 months ago)

You need blower.


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OfflineLHFSHP
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Re: Building my first flow hood [Re: Bsdgaou]
    #26887572 - 08/18/20 11:23 PM (3 years, 5 months ago)

TY! I don't know if it counts or not, but this would blow air to my understanding a extractor is a fan but backwards sucks and blow air.


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OfflineRoscoeReturnsS
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Re: Building my first flow hood [Re: LHFSHP]
    #26887971 - 08/19/20 08:45 AM (3 years, 5 months ago)

Those fans are not very good at moving air against back pressure. You need to know how much volume it can move @ a specific pressure, then compare to your filter’s rated static pressure at the airflow needed to produce laminar flow. I don’t think you’ll have much luck with extractor type fans. They are not designed for what your using it for.


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OfflineLHFSHP
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Re: Building my first flow hood [Re: RoscoeReturns]
    #26888103 - 08/19/20 10:09 AM (3 years, 5 months ago)

Thanks for your reply!!!, I got the graph online for this model the VK200 and got that is just enough for a 35x35 hepa filter (with prefilter) considering 1.3 inWg (or 320 Pa) at volumetric flow of 225 m3/h(aprox. 100 fpm of flow at pressure).



You can see the interactive chart here https://ventilation-system.com/product/vk-200#sheet

Again I'm not sure, It just the theory I wanted some practical input.


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