I built some fursuit head dryers for my local con, FurEh2014. They use a powerfist blower fan ducted to 3" ABS reduced to 2" ABS on each branch. The last blower fan on its own is a little bigger and pushes 1,200 cfm (opposed to 300 cfm on the smaller ones) Its really murr to stand infront of after a hour of dancing in suit.

I was inspired by Nitroshep's design when I went to RainFurest 2013 and VancouFur 2014. His are most advanced with moisture detectors on each brance, and a motion sensor to stop after a set time of inactivity. His blower fan also has a motion sensor. Quite clever! See his here:

http://www.furaffinity.net/view/13455738/