instructions

Materials needed:
2 5VDC 20mm fans ($4.00)from excess-solutions
2 9V battery connectors
1 push button switch ($0.25 at excess-solutions)
2 9V batteries
1 project box ($1.99 at Radio Shack)
Soldering iron & solder
Heat shrink tubing
18 AWG wire
2 Bread ties

Connect battery connectors in parallel, the fans in series and the switch as per the illustration above. Use the 18 AWG wire to make a long enough run to mount the fans on the top of the goggles with the bread ties and the box wherever you want. I mounted mine on the back of my mask strap. This configuration will give you 9V at double the current potential across a 10V fan load.