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 ...

Dear Jim: The repairman says I need a new gas furnace. He recommends a super-efficient one because my chimney also needs repairs. What are my options for the best comfort, and why is the chimney a ...

Venting rules change with efficiency — and mixing them up can lead to moisture buildup, heat exchanger damage, and dangerous combustion issues.

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 ...

Add Yahoo as a preferred source to see more of our stories on Google. U.S. Supreme Court building. The U.S. Department of Energy in 2023 and 2024 finalized stricter standards for consumer furnaces and ...

Q: With 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 should I consider?