Fanduct

This Fanduct is a spin-off of the Hugo project hosted at https://github.com/kr2/Hugo and http://www.thingiverse.com/thing:22586.

This Fanduct should fit on the standard GregsWade extruder, if the carriage isn't too big.
It is designed for two fans, one blows the cool air in and the other sucks it out. This should prevent unwanted airflow over the heated bed.