Thanks Clay!
I am definitely going to have a good look at the stand alone units. In the summer time our RH reading can get as high as 70% -- even with the dehumidifier on. I would like to keep it around 50% or less. What we currently have is a $250 unti from the hardware store. I don't think it is strong enough for our size room. The untis in the link are definitely bigger and more powerful so one of those will probably do the job. Thanks again!
Daniel