I want to thank all of you for your valuable info. I agree with you that the heating coil should best be after the cooling coil to help drop the moisture content. I was not lucky enought to have my system set up that way. But what I am trying to do is pull the moisture that the outside air has been introducing to my building. Also, with a return air of 55 degrees and an outside temp this morning of 57 the cooling valve does not have much of a load on it. But by heating the air it forces the cooling valve open to help remove more condensate/mositure. So,its not a perfect system, but we are trying to do the best with what we have.