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Offlinearea5one
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Registered: 05/04/09
Posts: 18
Last seen: 8 years, 2 months
HEPA filter basics
    #19121300 - 11/11/13 03:40 PM (10 years, 2 months ago)

Hi all,

I got the idea to build a glove-box, which is supposed to have air-filtering, and I've acquired a HEPA filter (see below photo - its a part for some vacuum cleaner).

The very basic question I'm wondering about is, which way is the air actually supposed to blow through this thing?

The idea that I have is to cut a hole in a large plastic storage box, and blow air through it using a PC cooling fan, but this would only work if the air is filtered from the inside-out of the cylinder. Does this make sense?

Any other comments too appreciated!



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InvisibleSpitballJedi
Ancient Astronaut
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Registered: 10/13/12
Posts: 8,598
Loc: Nibiru Flag
Trusted Cultivator
Re: HEPA filter basics [Re: area5one]
    #19121787 - 11/11/13 04:59 PM (10 years, 2 months ago)

That filter will not work very well for making a sterile work environment. It won't clean the air well enough and then you will just be blowing contaminants around you box.

For clean moving air, you need to build a proper laminar flow hood. Flowhoods are not a cheap endeavor though.

Most of us just use a still air box (SAB). This a very cheap and effective alternative. The idea here is to have very still air so contams can't float in to your sterile work.

If you can't obtain a flow-hood, then a SAB is the second best option.

Here's my SAB.


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OfflineNotfromarkansas
Really im not.
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Registered: 11/11/13
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Re: HEPA filter basics [Re: SpitballJedi]
    #19122082 - 11/11/13 05:57 PM (10 years, 2 months ago)

The filter isnt needed in my opinion ive got some 4 inch b+ growing in the closet 4 feet away i open it to let air exchange if your grow enviroment is really dirty ig a filter could be needed but anyways that filter is designed so air comes in from the outside.


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InvisibleThadeous
On the path

Registered: 08/02/11
Posts: 1,101
Re: HEPA filter basics [Re: Notfromarkansas]
    #19122478 - 11/11/13 06:54 PM (10 years, 2 months ago)

Spitball nailed it; the still air box relies on no air movement and can work splendidly for all things mushroom.


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