Filtered Vent for Prusa Core One (Air Filter)

I created this as I wanted to add air filtration to my printer that would use an off the shelf filter which had activated carbon and a HEPA filter, as well as including a fan to reduce the pressure on the built in chamber fans. I took inspiration from bento box air filters and created something stackable which can easily be changed, modified or added to in the future.

I chose the LV-H128 filter as this was cheap and readily available. It also was an easy shape and size to fit into my design.

I selected the Noctua NF-F12 iPPC-3000 PWM fan since it is designed for radiators and uses with higher static pressure. I have just hooked this up to a PSU in the wall so I cannot alter the fan speed currently, I hope to get time to make that in the future. I chose a 100-240V AC to 12V DC adapter with a 2.1mm x 5.5mm barrel connector and used a DC 2.1mm x 5.5mm barrel connector to 4 pin fan adapter to connect the PSU and fan. I got one with a switch so I can easily turn the fan on and off as I require for now.

I have included angled holes in the base so that air from the room can also be pulled through to the filter. This was mainly since I cannot yet slow the speed of the Noctua fan, so if there is not much air blown out of the chamber it can circulate air from the room through. These are angled to reduce chance of air blowing out of the base part from the chamber extraction fans.

All the parts connect to each other using 5mm x 2mm magnets and I have used 10mm x 2mm magnets to secure the base to the printer. This combined with the flat part that sits on top of the printer supports the weight. The fan can be screwed to part 4_Fan_Holder with the 4 screws that the fan is supplied with (standard PC fan screws).

You will require 80mm clearance at the back of the printer to fit this on. The magnets securely hold this to the printer, there is no need for screws. (I tested this using only 2x 10mm x 2mm Magnets at first and this was stronger than required, I have used 4 in the final design just to be sure).

I printed all my parts with PETG instead of PLA for a higher temperature resistance, however ASA or ABS may be more suitable if you are regularly printing materials with higher temperatures.

 Parts List:

• 1x     1_Base
• 1x     2_Adapter
• 1x     3_Filter_Holder
• 1x     4_Fan_Holder
• 1x     5_Fan_Cover
• 4x    10mm x 2mm Magnets (2kg holding ability)
• 32x  5mm x 2mm Magnets (0.5kg holding ability)
• 1x     Noctua NF-12 iPPC-3000 PWM Fan (Can be replaced with any 120mm PC fan)
• 1x     5.5mm x 21.mm DC Barrel Adapter to 3 or 4 pin Fan Connector
• 1x     100-240V AC to 12V DC PSU with 5.5mm x 2.1mm DC Barrel Connector (Must be 12V output for a PC fan)