I used a tupperware container the same size as my fan for a make shift housing which connects my 120mm fan to a 80mm custom filter.
Diy pc fan carbon filter.
Next put holes in each corner of the carbon filter square.
Learn more on carbon filters their types and functions here.
Make sure your fan is an one exhaust fan with at lea.
1 x cut to fit carbon pad for air purifiers.
Insofar as filter changing costs you will find that it is still much cheaper to buy furnace filters and variants of them without sacrificing on quality or air cleaning capacity.
I know everyone says to use the fan to pull out the air rather than push but i found that because pc fans are pretty low pressure i only had luck pushing.
Diy carbon filter for grow room.
See the graph below that shows an example of the filter fan performance.
This is the cheap way i know it looks shitty now but wait till its done and your plants are flourishing.
I used this filter.
Otherwise the whole purpose of the filter will be ruined.
20 x 20 x 1 merv 13 or fpr 10 filter.
Finally make another one.
Form your carbon filter by setting it over the computer fan and cutting it so it barely overlaps the sides of the fan.
We have tested the performance of these filter fans and they dramatically reduce fine particles and black carbon from the air.
What items do you need.
Supplies you need to make your own.
It still struggles a tiny bit but the back pressure makes.
The flanges are must to be of the exact diameter as the ducting and inline fan.