Quote Originally Posted by beenthere View Post
2 stage dehumidifies better then a single stage by increasing running time. The SHR isn't lower in first stage.

If your basement is staying better now. You are probably light on return from your first and or second floor. And pullling conditioned air down from the first floor into the basement.
Meaning that you are exchanging your basement air with conditioned air, not conditioning the basement air.
No, it was actually the opposite which started my investigation. The basement door was like a wind tunnel until I changed the return. I may not be the greatest at duct design but if you dump 800cfm in a space shouldn't you take out 800 cfm?

I guess my main point was why have an extra piece of equipment running and hopefully being maintained if what you have can do the work.