Water is a byproduct of combustion. If the proper venting of flue gases is neglected — as is so often the case, unfortunately, in our industry — water in the form of condensation triggers serious ...

The problem: Replacing an existing gas furnace with a new, more efficient furnace. The apprentice: Allen Charles Edwards (ACE) — First-year mechanic. The technician: N. Arthur Thomas Egan (NATE) — ...

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. A: No. What ...

Q. We have had a persistent leak in the ceiling by our fireplace. I read in your column that a saddle or a cricket behind the chimney would help this. We had a new saddle installed but have found that ...