If you need to purchase a gas-burning forced-air furnace but aren't sure how they work, here's what you need to know.

Gas and oil furnaces burn fuel to provide heat for homes, and that presents a basic problem. Every combustion process produces noxious gases. How do you keep those gases from circulating throughout ...

Newly-manufactured indoor residential gas furnaces will have to be at least 95% efficient starting in late 2028 under a new rule issued by the U.S. Department of Energy (DOE). In an effort to save ...

Heat pumps run on electricity and furnaces run on fossil fuels, natural gas, propane, or oil. Our experts say there's no clear answer for which type is more energy efficient. Location plays a major ...