I am exhausting back into the shed, I think I will change that. Right now I don't have the budget for 6" but I got some side mechanic jobs soon and I'll upgrade.
Good to know!
Thanks for the input guys!
Watch your placement if you have neighbors.. exhaust can look like a dryer vent in cold temps.. pretty obvious if run fulltime.
If you have a wooden floor i'v read where guys exhaust under the shed, I have concrete so I placed vent behind firewood stack facing woodline and away from eyes.