That new high-efficiency furnace you’re installing might come at a high price: a buildup of carbon monoxide around the water heater or condensation in the chimney. The source of the problem is what ...

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 ...

Q. Jean asks: I live in a 57-year-old home, heated by the original "gravity" furnace installed when the home was built. During the winter months, water condensation appears on some of the windows, ...

Natural gas furnaces not only heat your home, they also produce a lot of pollution. Even modern high-efficiency condensing furnaces produce significant amounts of corrosive acidic condensation and ...