Most noncondensing residential furnaces use natural draft to drive the combustion process. Even 80%-AFUE furnaces with combustion blowers are natural-draft furnaces. The combustion blower in an 80% ...

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 ...

Q. My question is about chimney bricks. In 1987, I bought a twenty year old brick house. The furnace, gas water heater, and fireplace are all in the basement so the double flue chimney rises from ...

QDEAR BARRY: We're buying a 12-year-old house and there is a difference of opinion between our home inspector and a heating contractor. Our inspector checked the forced-air furnace for carbon monoxide ...

I'm going to guess that you have a newer furnace. If that's true, you're probably getting condensation in the flue. Older furnaces didn't have that issue. The hot flue gas they produced literally shot ...