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.

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 ...

Key Points Check thermostat settings, filters, and fuel supply first when your furnace blows cold air.Call an HVAC technician for issues like sensor failures, clogged burners, or duct leaks.Skipping ...

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 ...