For example, a 40-pound bag of heating pellets ... Kerosene heaters are another heat source alternative for those who may want to look beyond using wood logs or pellets, especially during emergencies.

Sunlight and wind, for example, are such sources that are constantly being ... Solar technologies can deliver heat, cooling, natural lighting, electricity, and fuels for a host of applications.

The Fraunhofer ISE has designed a novel method for assessing the potential of low-temperature heat sources for large-scale heat pumps. The five-step process was tested on the German city of Fellbach, ...