3D printed ear savers Made from PLA Color is sent out at random. If you have a preferred color please contact BEFORE purchase. We can do custom phrases * please ask before purchasing. Minimum order of 50 pieces **
Building a Corsi-Rosenthal Air Filter Box for the first time
It took me about 50 minutes to build this Corsi-Rosenthal air filter box with parts from Home Depot here in Toronto. It’s a 20″ box fan, four 20″x20″x1″ 3M 1900 air filters (1″ deep), some duct tape and cardboard. The cardboard came from the fan’s box and from a grocery delivery, so you can use just about cardboard you’ve got around. The shroud has a 15″ diameter hole, as suggested by David Elfstrom on Twitter;Continue…