20mm/25mm Filter Upgrade - 120mm IKEA Platsa fan with filter

This is an upgrade for IKEA Platsa 120mm fan with filter to use larger activated carbon filters. It is just a quick and dirty deisign. 

This is just the box for a 20mm or 25mm filter, you can find all other parts on the page of the original design. The original design used a 15mm filter.
 

I have used a filter from the automotive sector. 

• 25mm Filter (amazon)
• 20mm Filter (amazon)

I also made a 140mm fan version.