80mm Fan to 3 in Tube Adapter

thingiverse

I designed this adapter to connect an 80mm fan to a 3-inch dryer duct made from aluminum or spring material. Initially, I created it to work with the "Active Carbon and Hepa Filter assembly set" by Donzi (https://www.thingiverse.com/thing:1764408), which is why two small rubber-band wings are included in the design. Instead of using a band to hold everything together, I chose to screw the fan directly to the mounting bracket, but I left the option open for others who might prefer to use bands. This adapter enables you to reroute the output from the charcoal/HEPA filter back into the printer enclosure, retaining the heat generated by a heated bed. To maximize efficiency, connect a short length of 3-inch dryer duct to an insulation sleeve that fits snugly around it.