If you have a two-story home in Chattanooga, you’ve probably dealt with it: the downstairs feels comfortable while the upstairs is noticeably warmer and often feels more humid, even when the AC is running. This is extremely common here. Warm air rises, and so does moisture. In Chattanooga’s humid summers, that rising air makes the upstairs feel muggy and uncomfortable. Add a hot attic (where most ductwork runs) and a single thermostat usually located downstairs, and you get u