120mm Extractor Fan for 3d Enclosure with HEPA/Carbon filters

thingiverse

A housing to be used on plexiglass enclosures, housing a 120mm (max 27mm deep) fan, plus Zortrax HEPA/carbon filters. I used a Tukkari TS enclosure from ww.tukkari.com Requirements: EPDM 2.6mm (or TPU) seals. Can usually be purchased in metres. 3 seals required, one either side of plexi and one to seal the fan. M3 bolts and square nuts. Zortrax filters - readily available (they are 119/120mm) Fan - must be high pressure type. Either a Noctua IPPC 3000 (12v or 24v), or a less powerful X-Fan RDH1225S1. I used the Noctua. Normal PC case fans are not powerful enough to push air through these filters. The filter side is on the outside of the enclosure, fan housing on the inside of enclosure. 8 M3 bolts/nuts hold the two halfs together. Optional wind guard. Due to the fan blasting air into the HEPA fan, the filter is very dense and this results in some blowback. The guard stops this disturbing the print but still allows the fan to suck air. Also included is a template panel for the cutout. ONLY USE THE 8 OUTER HOLES & THE CENTRAL MAIN VENT HOLE. Ignore the 4 fan corner mounting holes. Wiring. In my case i connected the Noctua to a NA-FC1 Noctua speed controller, and then a 12v supply to that. This allows more control of the fan speed. However there is no issue directly connecting the fan to a 12v supply.