Another source of moisture in that area might be the exhaust pipe from the furnace. Most 90% furnace exhaust pipes are located close to the intake pipe, and the exhaust gasses coming from a ...

Q: We have a high-efficiency condensing furnace that vents out a side wall. Should I be concerned about the icicles I see built up on the plastic pipe outside the house? -M.C. Kalamazoo.

Pros say most furnaces will be fine as they run continuously ... “One thing a lot of customers don’t think about are those exhaust pipes that vent out,” said Christina Yendrzeski of Quality ...