I had a Sani Dry Sedona installed, but I think it was done incorrectly. The way it was installed was at the cold air return, and then returned back into the cold air return. Based upon some diagrams (and some additional reasoning), it seems like the return should go back into the supply trunk for the house. That way, even if the Geo isn't running, I would still get the benefit of whole house de-humidification and purification. I have attached a couple of diagrams that show this, but I would like to get examples of how others have done this, please.