Shopping for a furnace? Let us help you narrow the field with an overview of the best furnace brands for energy efficiency.

TOLEDO, Ohio — With temperatures plummeting in the last few weeks, people have once again been thinking about how to keep the air in their homes nice and comfortable. In homes around northwest Ohio, ...

Dear Jim: 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 ...

Natural gas furnaces are the most economical home heating devices — cheaper to operate than electric furnaces or baseboard heaters, heat pumps, geothermal or biomass. But energy use still can vary.

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 ...