I am thinking about improving my air circulation, I currently have a 125mm sucking out via my carbon filter and I have a 125mm blowing fresh clean air in. I have been thinking about upgrading both my fans to 150mm or would it be more beneficial to only upgrade the fan sucking out and leave the fan blowing in as a 125mm?? Any suggestions people??
My suggestion is don't use an intake fan. Just use some ducting to make the intake hole light proof and your exhaust fan will create negative pressure and pull air in. Do you have an air cooled hood?