Thanks billy!
You're right.....the fan doesn't make any audible noise outside of the cab.....the problem is the "whoosh" noise of the air exiting.
I'd like to avoid using a muffler as I would prefer to have everything housed inside the cab. I've heard of some people pushing their exhaust into their carbon scrubber and claiming it doubles as muffler. While others I've read claim the scrubber won't work as well when pushed into instead of having air pulled thru it.
If I did decide to use a muffler I need someway to make a big thing sticking out of my box discrete while still allowing air to escape. Any suggestions?? I have a 4 in hole I'm exhausting thru right now and its located on the upper backside of my cab. I was thinking of using a box of some sort but I can't think of a way to make it have good airflow while still being stealth.
THanks for any input