There's no problem with a one-pipe system, but the rules for venting are different. I've read dozens, maybe hundreds of high-efficiency furnace installation manuals. Every single one of them had ...

Q. With the deep winter snow we had last season, the air intake for our furnace plugged up. I had to separate the pipe from the furnace and let already-heated house air be used in the furnace rather ...

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 ...

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 ...