@macnasty; I forgot to mention another advantage to (some) windowless units. They have a dedicated dehumidifier setting. When we first started that room we had a humidity problem from water comming thru the floor, we'd run that thing just to get the water dried up many times.

@TankJR; I knew you were not picking (nit-picking?) on me, just wanted you to realize that I understood more went into sizing an AC then just the lights. BTW you are correct about BTUs, they are not created equal. A windowless 12k will compete with a 10k window unit which will compete with a 8k split system.

@Rusty; I got to give you credit for all the help you provide, especially in the plant problem department. I think I have to look into starting the ball rolling on Sainthood for you. I know I'm familar with your "dealing with heat issues" thread, I hope mini-mac reads it too. Good point about sizing the AC larger, it truly is more energy efficent that way.

For everyone: As good as AC's are at cooling don't overlook chillers.

IMHO a well designed chiller system is more energy efficent then AC.
[I can hear the keyboards starting up now]

OM :jointsmile: