khyberkitsune is correct. I'm going to use an elbow under my box and continue the ducting out my window. Should I use another elbow in my box to connect from fan to cooltube since its going to be a 90 degree angle or the ducting works fine? Also, since I'm using a 6" exhaust vent, what size should I cut out for my intake? I don't care for sound proof, I dont want bad pressure in my box.