I have the temp one on order should be here in 2 days, our house is so dry, that the humdifier in the tent has to be on continually, it's also "adjustable", whereas the fan isn't! If I can just have the fan turn on when it gets over 77F or so, that should really help! Thanks again Wally for all your assistance. I spent 30 years wiring locomotives, and really tend to over think electrical problems, I always think I can fix it with a few resistors or capacitors, but sometimes it's just pointless.