DIY activated carbon air filter


Old 12-26-19, 12:06 AM
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DIY activated carbon air filter

Hi, I'm looking to make a DIY air purifier for my kitchen by attaching an activated carbon and a HEPA filter to a box fan. Unfortunately I'm only able to find high quality carbon filters for sale by reputable air purifier brands and they seem rather expensive, when activated carbon is so cheap.

I was wondering how I could create my own carbon filter? i.e, what type of activated carbon and which materials I get? I'm hoping to create one with similar dimensions (rectangle shape) as a HEPA filter so I could easily tape it on the side of a box fan.

Btw sorry if I posted this in the wrong section, this is the closest one I could think of
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Old 12-26-19, 04:15 AM
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Did you google carbon air filter, lots of videos on making them with 5 gal buckets, could improvise to a box fan.

HEPA filter is easy, a furnace filter!
Old 12-26-19, 12:14 PM
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This may not be what you are looking for but take a look at it to see if you can use this. I use this filter in my furnace and it works for me. Go to Home Depot or Lowes in their furnace filter section. Look for an item called "The Web Absorber". The last one I bought was about $10.00. If it works, Great and if not continue with your search.
Old 01-03-20, 11:51 AM
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coconut shell based carbon will be much cheaper. Also don't think a box fan is going to move air with a HEPA filter attached do it. Prop fans don't work well with static pressure.
Old 01-03-20, 12:28 PM
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Also don't think a box fan is going to move air with a HEPA filter attached do it. Prop fans don't work well with static pressure.
I agree that static pressure will reduce airflow significantly. I suspect the greatest issue will be the noise the fan makes as the air moves through the filter and encounters friction. High volume (CFM) fans are great at moving air but not very good when they encounter resistance.
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