Anthony Bolgar published a new build:

Read more about this build...

 

WooHoo...this was build #600 for Openbuilds!

 

It is basically a 3D printed inverted funnel with a high CFM PC fan inside being supported by some 20X20 vslot. I would like to have it recirculate into the room air after passing through an activated charcoal filter, but I have a feeling that the consumables will make it cost prohibitive, so I am trying to devise a lightweight flexible hose than can be exhausted outside as an alternative.

 

OK, I have found a source of activated charcoal filters that won't bankrupt me. 10/20Pcs Black Square Activated Carbon Foam Sponge Air Filter Pads Set 13x13cm | eBay 20 pieces 13cm X 13cm for $10.99 This means I do not need to vent it outside, the build has become much easier to design. I should have some pics/drawings posted in a couple of days.

 

I have decided to trash my original idea on how to build this and am currently mulling over a couple of alternative options. I would like to make this build using as many off the shelf openbuilds parts, and keep the number of 3d printed parts to a minimum (preferably 0 ). In the mean time while I try and decide the new configuration, I can at least start on the filter section of the exhaust system, pretty basic, use some vslot to make a frame that the charcoal filters will sit in. Will post a picture or two once I have it prototyped.

 

Sourced the following fan for the exhaust:
High Air Pressure 120mm 38mm Fan Cord Guard 12V 2Pin DC 240CFM Ball Bearing 0.8A

It moves a whopping 240CFM of air, most 120mm case fans move around 10-20 CFM.

 

Just drawing up some front and back frames for the charcoal filters, will laser cut them out of 3mm acrylic. They will sandwich the filters between them, using a 20X20 vslot as a frame with the acrylic bolted to the extrusion, sandwiching the filters in between.