It's going to sweat no matter what. WHen I had the Old Air unit in my truck which is pretty much similar I really had no problem sweating here...until I drove to So. Texas! I ended up putting a towel on the floorboard as not to ruin the carpet. My cab is well insulated throughout top to bottom and inside the doors too. All of my windows seal tight. I'm sure it is worse in other trucks. When I got back home I yanked the system and put the Four-Season unit all in. No more issues. Besides having a REAL defroster and the ability to blend the air and the temperature. The evaporator is on the outside. No problems any more
