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OfflineBlipstir
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I'm a teapot


Registered: 05/05/14
Posts: 439
Loc: CO Mountains
Last seen: 1 month, 22 days
HEPA Filter Direction of air flow?
    #27814972 - 06/11/22 05:51 PM (2 years, 7 months ago)

Hello team, So from what I understand about HEPA Filters is Air flow is suppose to go one specific way. Meaning air will be filtered when going through it one way, but not the other way. Or at least filter at lower success rate. Because of this many HEPPA Filters come with a bright colored sticker with an arrow pointing to which direction the air should flow through.

I'm curious if there are any other methods to identify the correct way to install a filter with out obvious directions like an arrow point "this side down." This is my filter


There are no stickers on it but the edges are different on both sides.
One side has a little lip that gives a bit extra space between the edges and surface of the filter netting.


On the other side the filter netting is much more flush with the edges.


My gut is telling me the more flush side should be coming in contact with air first then pushing through clean air out the side with the extended lip. Any thoughts on this? thanks everyone!

Edited by Blipstir (06/11/22 05:52 PM)

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Invisiblesandman420
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Registered: 06/17/04
Posts: 5,387
Trusted Cultivator
Re: HEPA Filter Direction of air flow? [Re: Blipstir]
    #27815019 - 06/11/22 06:19 PM (2 years, 7 months ago)

I think the face would be the flush side. But it shouldn't matter as long as it stays installed the same way through it's life.


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OfflineBlipstir
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I'm a teapot


Registered: 05/05/14
Posts: 439
Loc: CO Mountains
Last seen: 1 month, 22 days
Re: HEPA Filter Direction of air flow? [Re: sandman420]
    #27815262 - 06/11/22 09:12 PM (2 years, 7 months ago)

Quote:

sandman420 said:
I think the face would be the flush side. But it shouldn't matter as long as it stays installed the same way through it's life.




I was also hoping that as long as I use it the same way it would be alright. I'm going to an HVAC place Monday to ask some questions. I recently started with agar which is why I got this flow hood.

I keep getting mostly bacterial contams and sometimes other fungus too. I'm almost positive it's because I didn't think of adjusting my PC cycle to the elevation I'm at. I moved my station around today which why I had time to take this pics and ask about this. Thanks for your thoughts sandman

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