Hello, Uncle Doug...
Do you have a Window in your room that adjoins the outside? Even though you're Not concerned about smell, I still think you need an exhaust setup (along with a regular fan) to give your plants some ventilation.
If you have a window to the outside, you could take a pane out, put up a piece of plywood and cut a round hole for the exhaust. I used a regular dryer-type fitting for the exhaust pipe to connect to (Be Sure to tape, caulk or use some of that expanding foam to seal off the vent so you don't get any light leaks or unwanted cold or hot air coming in.
Are you going to be able to control the temp and humidify in that Room? Just some things to think about... I sure others may be able to add some helpful suggestions.
Good Luck with your new grow room and your future grows!