Have you ever noticed small water stains near the edge of your ceiling in certain areas and wondered how that can be? You just had your roof replaced a few years ago, and the contractor said it was a ...

QUESTION — I read your piece on capping redundant flues, which involve chimneys. My high-efficiency furnace has made a straight-up-thru-the-roof flue superfluous. It’s capped at the bottom, in my ...

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 ...

Question: Several years ago, we had a tankless water heater and very high efficiency furnace installed and the installers tape-sealed off the old metal furnace chimney in the basement, as the new ...