Originally Posted by CKD-001

here are the pics

the mask
Attachment 1548

the 17mm fan zip tied to the center of the goggle shelf
Attachment 1549

wiring back to the switch
Attachment 1550

wiring from the switch to the battery
Attachment 1551

the battery on the outside of the mask underneath the goggle strap
Attachment 1552

Note this type of fan is power biased i.e. if you hook up the power incorrectly you blow the fan motor. At least it was for me, and I had a second fan to work with. Since the fan is a 5v fan I used a resistor inline with the positive lead to drop the 9v to 5v. Hope this helps.