Yeah its one tub on top of the other. I chose to go with the smaller ones because its just personal use so no need to have a bunch of ladies at once. I was way off its more of a 10" fan lol so no it doesn't take the whole top but does pull alot of air out. ( i did the lighter test at my passive ports and got a good pull.) Yeah its flat white. No smell isn't an issue at all and if it for some reason becomes one well thats what this site is for lol. Awesome I'll have to head to the store in the next couple of days and pick some of that up. I'm still doing some work on it so once its completely finished I'll get some pics posted. Thanks for the help.