A new proof-of-concept device trapped solar radiation and used it to heat an object to a blistering 1,800 degrees Fahrenheit (1,000 degrees Celsius), raising hopes that steel furnaces could be powered ...

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 ...

When Derek Eder started looking for an all-electric heating system for his 100-year-old home in Oak Park, some local furnace installers refused to work with him, saying the technology wasn’t up to the ...