That’s because fully electric furnaces do not lose any heat through venting gas, so they are all considered high-efficiency. But an electric furnace isn’t the same as a heat pump. Heat pumps ...

Compare this with a typical high-efficiency gas furnace with an Annual Fuel Utilization Efficiency, AFUE, of 96%. That means that we are getting a fraction of one, 96%, in the conversion of energy ...

Get expert advice on improvements to your home, including design tips, how much you'd expect to pay for a pro and what to ask ...

Radiantly versatile – In Cologne, DLR has a unique facility in Germany for irradiation tests with natural and artificial sunlight in the form of the High-Flux Solar Furnace and Solar Simulator. The ...