Author Topic: Box fan Air filter?  (Read 1868 times)

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Offline tp4tissue

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Box fan Air filter?
« on: Sun, 10 May 2015, 20:15:30 »
Update:  LOOK at all the pollen, and it's only just begun... used 10 days..






Any of ya'll do 1 of these?

I've put it off for several years..

But this year, since I'm training myself to survive under heat and fresh air,  I figure I'd tape one together.

The front cover is important, minimizes ingestion of room air..  I get more positive pressure with the front cover

I noticed that it was sucking in air from at least 3 inches of the front bezel..  The blades are too short and not close enough to the bezel..
 

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Offline noisyturtle

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Re: Box fan Air filter?
« Reply #1 on: Sun, 10 May 2015, 21:47:48 »
Get a tower fan you n00b!

Offline tp4tissue

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Re: Box fan Air filter?
« Reply #2 on: Sun, 10 May 2015, 21:57:43 »
Hahahahaha...  Tower fans are the biggest consumer Ripoffs ever created..

Sure they're compact,  but they move very little air.. 

Even worse, they move very little air relative to the Noise they generate. 




Offline noisyturtle

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Re: Box fan Air filter?
« Reply #3 on: Sun, 10 May 2015, 22:01:58 »
Really depends on the model. My Honeywell is quieter than my computer and I keep it off max setting because it's too much/blows everything all around the room. Then again I've had tower fans that are loud and barely move air 3ft in front of them. I've owned a lot of fans, and short of just getting a high velocity fan that sounds like a turbine engine this Fresh Breeze is the best fan I've owned.

Offline tp4tissue

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Re: Box fan Air filter?
« Reply #4 on: Mon, 11 May 2015, 22:17:59 »
So I've been running this thing for 2 days now..

"prolly placebo" haha..  But, I feel great..

Got positive pressure,  uses almost no electricity, 59watts,  24hours = $0.25  at my rates.


I guess time will tell if it actually cuts down on the dead skin cellz // pollen

Offline VoteForDavid

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Re: Box fan Air filter?
« Reply #5 on: Tue, 12 May 2015, 23:24:18 »
You have a filter with too much restriction for this kind of fan, is why it was sucking air in the front.  The fan is trying to move air, but can't move air through the filter from the rear very well, so it moves air around from the front instead.  If you could get the shroud around the blade, instead of over front of the box, that would (be difficult but it would) help.  Getting more surface area on the filter, or just increasing the number of filters would also help.  The shroud you have is a band-aid... which, if it works, I entirely support!  If it works, it works.

Living in the allergy capital of the universe, I have rigged up a DIY HEPA FFU for use in the house.  My work was going to pitch new-ish 20" square 3" thick HEPA filter modules, and I slapped a 20" box fan on one.  Not much air flow, too much static pressure. It did what you noticed, sucking air from the wrong side.  I made a box with 3 of the 20" HEPA filters for sides, cardboard for bottom and front, and the fan on top.  Tape to hold it all together.  Over top of this, a big cardboard shroud directs air toward the front panel, because it was circulating air from the top to the filters on the sides.  Now it blows in one direction, LOTS of cleeeeeean air.  Recommended, if you can spare the space.  And can stand to look at it.
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Offline tp4tissue

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Re: Box fan Air filter?
« Reply #6 on: Wed, 13 May 2015, 21:25:54 »
I'm not sure I need Hepa.

The air around here is decent, I just need pollen filtration..

Offline engicoder

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Re: Box fan Air filter?
« Reply #7 on: Wed, 13 May 2015, 21:30:16 »
   

Offline tp4tissue

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Re: Box fan Air filter?
« Reply #8 on: Wed, 13 May 2015, 22:56:02 »
http://amzn.com/B00L3DDZQO

Yea I was looking at that,  but it seems that it is not merv rated.. So the manufacturer can pretty much put any numbers they want on there..

Also, even with that filter, I think the shroud is still needed.

Offline jamster

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Re: Box fan Air filter?
« Reply #9 on: Sun, 17 May 2015, 06:18:24 »
The best site that I have seen for DIY filters (complete with particle counting info and longer term testing) is run by a bunch of geeks in Beijing, where the air quality is horrendous:

http://particlecounting.tumblr.com/
http://smartairfilters.com/en.html
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Offline tp4tissue

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Re: Box fan Air filter?
« Reply #10 on: Sun, 17 May 2015, 13:08:45 »
The best site that I have seen for DIY filters (complete with particle counting info and longer term testing) is run by a bunch of geeks in Beijing, where the air quality is horrendous:

http://particlecounting.tumblr.com/
http://smartairfilters.com/en.html

Yea.. those are essentially of the same breed as the boxfan style builds.

The issue is, those people are trying to "FILTER" air from the entire room..


I think that is useful for high pollution areas..

But, for me,  I just want my "incoming air" free of the larger dust, so I don't have to vacuum as much..

I think the air around here is good enough that I don't need the "hardcore" Hepa filtration..




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Re: Box fan Air filter?
« Reply #11 on: Sun, 17 May 2015, 13:11:14 »
I made one of these with a 24 x 24" filtrete filter (had to order them on amazon for a house project I was working on anyways) in order to have suction of spray paint fumes and particles/dust it leaves as I was doing some artwork and keyboard case painting indoors. Montana Gold smells SO good but it is SO bad for you.
My wife I a also push her button . But now she have her button push by a different men. So I buy a keyboard a mechanicale, she a reliable like a Fiat.

Offline tp4tissue

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Re: Box fan Air filter?
« Reply #12 on: Sun, 17 May 2015, 13:40:42 »
I made one of these with a 24 x 24" filtrete filter (had to order them on amazon for a house project I was working on anyways) in order to have suction of spray paint fumes and particles/dust it leaves as I was doing some artwork and keyboard case painting indoors. Montana Gold smells SO good but it is SO bad for you.

Yea..

I think overall, it's been a fun thing to do.. hahaha..

I can definitely see the filter working, even though it's only been a few days.


Anyone got a laser particle counter I could borrow? 

LOL

I promise I'll give it back.

Offline jamster

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Re: Box fan Air filter?
« Reply #13 on: Mon, 18 May 2015, 05:38:07 »

Yea.. those are essentially of the same breed as the boxfan style builds.

The issue is, those people are trying to "FILTER" air from the entire room..

I think that is useful for high pollution areas..

But, for me,  I just want my "incoming air" free of the larger dust, so I don't have to vacuum as much..

I think the air around here is good enough that I don't need the "hardcore" Hepa filtration..

I thought Geekhack was all about tech overkill :)

If you are just wanting to reduce dust for cleaning, then why not just slap 3M Filtrete over whatever you use to move air into the room (assuming you're using a fan for input). It has negligible air resistance and filters dust well- I use the stuff on my computer intakes and haven't had to dust a computer for over three years now.
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Offline tp4tissue

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Re: Box fan Air filter?
« Reply #14 on: Mon, 18 May 2015, 10:05:29 »

Yea.. those are essentially of the same breed as the boxfan style builds.

The issue is, those people are trying to "FILTER" air from the entire room..

I think that is useful for high pollution areas..

But, for me,  I just want my "incoming air" free of the larger dust, so I don't have to vacuum as much..

I think the air around here is good enough that I don't need the "hardcore" Hepa filtration..

I thought Geekhack was all about tech overkill :)

If you are just wanting to reduce dust for cleaning, then why not just slap 3M Filtrete over whatever you use to move air into the room (assuming you're using a fan for input). It has negligible air resistance and filters dust well- I use the stuff on my computer intakes and haven't had to dust a computer for over three years now.

I use the box fan to move air into the room.

The Vac HEPA type filter is way too restrictive for the box fan. I'm already at a dramatically reduced flow using my Merv 8

I might try a Merv 13 in the future,  but I know HEPA is Merv 16+,  and there just won't be enough fan pressure for it.

Trying to get away from AC-addiction and "Fatness"

Offline tp4tissue

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Re: Box fan Air filter?
« Reply #15 on: Wed, 20 May 2015, 11:20:21 »
Update:  LOOK at all the pollen, and it's only just begun... used 10 days..