Oh, the exhaust fan has a max cfm of 80 and is routed perfectly straight up through 5' of ducting. I have both a regulator to dial up/down the speed of the fan as well as thermostats to control the fans if needed but neither are hooked up currently.

The intake on the left side of the box is really connected to 20" of flexduct to keep it right at the bulb for fresh cool air.