While your central air conditioner produces cool air out of sight — usually in the attic or a closet — the coils in your A/C unit are busy producing something else: Water, and lots of it. Serious water damage can result from condensation that forms naturally on the evaporator coils. A central air conditioner may produce a surprising 5 to 20 gallons of water per day — especially during a humid Indiana summer. In a properly maintained system, the condensate collects in a drip-pan beneath the air handler and drains through a hose connected to your sewer system. If the drain system fails, or the evaporator coils produce more condensate than the drain can handle, gallons of water could silently damage your house before you’re even aware of it.