Not unless heating coil somehow drops below dew point of conditioned air leaving the evap coil. Ain't going to happen as long as water inside coil remains at same temp or slightly above air passing over coil.
Originally posted by mikeinva
If I close the ball valves to prevent hot water from migrating to the heating coil during Cooling season will condensation form on the heating coil as it cools and then fall under which there is no drain pan?? If so wouldnt that lead to a rusting out of the air handler bottom??
Building Physics Rule #1: Hot flows to cold.
Building Physics Rule #2: Higher air pressure moves toward lower air pressure
Building Physics Rule #3: Higher moisture concentration moves toward lower moisture concentration.