Gary, My window has condensation on the bottom of both sashes, about 3 inches worth. My shabby triple tracks don't have any moisture on them until the temp. goes below 30'. i do not have a humidifier on my furnace and my humidity is running about 45%. i do no think this is a lot of moisture. in the heart of the winter i usually put a pan in the living room with water for more humidity. My window is in my bedroom.