Help me with my diy carbon filter design.

kabootles

kabootles

New Member
Originally posted over in the DIY section, but figured it might do better here.

Hey guys, noob here. Excited cause I will be starting my first grow soon! (Turning a minifridge into a growbox)


Anyway, being cheap I somewhat came up with my own idea for a simple small carbon filter, mainly inspired by This Thread.


So here's my plan:


I will start with this mesh pencil cup, it's 4.2 inches around and about 5" tall.
View attachment 3027922
Next i will take a standard carbon pre filter, like this one:
View attachment 3027924
Cut it to size, and wrap it around the cup, securing it with zip ties and duct tape.




Lastly I will stick my 4 inch inline fan into it (100cfm). My hope is that because it is somewhat conical the fan should fit into it nicely.


Excluding the cost of a fan, this could be the cheapest filter I've ever seen, with a total cost of under 10$.

How does it look to you guys? I guess my main questions are:
1. How many times should i wrap the carbon filter strip around it?
2. Will a 100cfm fan be able to push enough air through it to accommodate a passive intake? (My fridge is a decent size, I'd guess to be around 3-4 sq feet)
 
NorthofEngland

NorthofEngland

Well-Known Member
"A mini fridge....".

How many plants do you hope to grow in a miniature fridge?

Unless we have different ideas about the size of a mini-fridge....
The one I am thinking of is only big enough for a few cans and a microwave meal.
 
Cascadian

Cascadian

Well-Known Member
I found that the prefilters need a lot of surface area to work well. They also lose their odor blocking ability pretty quick like 2 months.

I made one for my veg room a while back that worked really well for about 2 months then was worthless. If I had it to do over again I would just buy a small cheap carbon filter off ebay for like $40. I think Carbon filters are one of the things that should not be DIY. Unless you are in a legal state or in a situation where it isn't a big deal if it fails.

Anyway, here is the one I made also with a 100cfm fan. Total cost was about $18 not including the fan, it is triple wrapped in the prefilter material and has good surface area. Took about 10 minutes to make it. https://www.rollitup.org/indoor-growing/735566-simple-easy-cheap-diy-carbon.html
 
Luwigy

Luwigy

New Member
LOL "Make a thread"..... ive wanted to do that for days !!!! not that simple on ANY site ive tried and tried theirs no "Make a Thread" button anywhere (do i need to be a paid premium member???)
 
CashCrops

CashCrops

Well-Known Member
Luwigy said:
LOL "Make a thread"..... ive wanted to do that for days !!!! not that simple on ANY site ive tried and tried theirs no "Make a Thread" button anywhere (do i need to be a paid premium member???)
Click to expand...
No, you can start a thread. you need to click on the forum area you want to post in and you should see the green button with the + sign on it for new thread.

newthread.jpg
 

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