Our house has a 3/4" PVC pipe coming out the side which drains condensation from the central air conditioning. It drips at what seems like a normal rate. Taking a wild guess, I'd say a gallon per day. ...
I live in a flat in an older house and I have the disadvantage of living next to an outer wall. In autums/springs there is a period when the central heating isn't turned on yet, but it's already ...