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 ...

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 ...

Gas furnaces generate heat by burning natural gas. They’re available in varying sizes and energy efficiencies and produce a hot, dry heat. While still the most widely used furnaces, they’re starting ...

It's perfectly acceptable to have a high-efficiency furnace installed with one pipe. Just flip through the pages of any high-efficiency furnace installation manual and you'll find the answer. I'm ...

Dear Jim: With natural gas prices so high now, I think I should replace my old furnace even though it still works. I want the most efficient design to save money and reduce pollution. What models ...

The concept of the “high-efficiency furnace” in popular consciousness dates back to the 1980s. That’s when the National Appliance Energy Conservation Act of 1987 required all new furnaces be 78 ...