Derived from the Latin word fornax, meaning oven, a furnace is a large heating appliance designed to evenly distribute heat throughout a building. Furnaces accomplish this by burning fuel internally ...

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 ...

Skipping the manufacturer's instructions during installation may result in a furnace that fails within six months or less. For example, heat exchangers can crack from improper venting, and gas valves ...