I'm trying to work out a way to keep the pressure up. If i put the fan exhaust next to the goggles, or run a very short tube, its like a leaf blower, but when its tubed up the pressure drops to the equivalent of a person exhaling, which to this point has been enough.
If i tape the box up, theres not enough airflow coming in for the fan to work.
So thats my next thing to tinker with.
Or try with 2 smaller fans in a series circuit, but last time i ran out of time, tubing and patience