We have a 5 year old burm style home with the furnace unit and duct work in the attic. During the winter, water will drip at times from the registers. Now our ceiling is stained and unless we run the circulation fan it will do this. Does anyone have any ideas on how to keep this from happening? We heat with a woodstove and are right now running the dehumidifier to keep the static out of the clothes. HAHA! Thanks for any and all help.