I live in a 2 story 2 zone heating and air conditioning home in Virginia Beach. My home is heated by 2 Janitrol furnaces located in the attic. One of the units (Downstairs) is a high efficiency unit (AFUE 92.6). the other (upstairs) unit is rated at AFUE 80.0. The problem I have is as follows: When the temperature stays below freezing (believe it or not it does that in Virginia) for several days, an icicile forms between the dischage line located outside the house ( its 1" pvc protruding 4" from the siding and about 14" above the ground. If I dont regularly go outside to kick the icicile from under the discharge line then then the water will back up all the way to the attic, fill the drip pan around the furnace and then dump water in the attic causing severe water damage. I know these units are probably being used in places like Buffalo NY, so my question is what do I do. I would like to know what to ask a HVAC contractor to "FIX" so that this problem will go away. Right now I have a Bucket filled with rock salt under the discharge line. I punched holes in the bucket for water thats been melted by the rock salt to escape. I periodically add rock salt to the bucket as needed. There has got to be a BETTER WAY!! HELP PLEASE.