Hi. I am currently working on a supermarket with humidity problems. Humidity cant get lower than 70%rh. I put a data logger and sometimes RH% gets to 90!!!! There is even starting to grow mold on the ceiling. The problem is mainly in the freezers and refrigeration area that is close to the entrance of the supermarket. They installed a motored air curtain in the entrance to keep the outside air outside. The a/c for that area is a 25 ton York split system. Some people recomended me that they should install a reheat coil in the supply duct to reduce humidity. Is it true that reheat coils remove humidity and need a drain? I have no experience with reheat coils. I wanted to know what you guys recomend. Thanks!