That’s when the National Appliance Energy Conservation Act of 1987 required all new furnaces be 78 percent efficient, meaning 78 percent of the heat went into the home. Before then, many furnaces ...

This budget is estimated to help reduce the costs of home energy efficiency projects for up to 15,000 households, reported The Center Square. Making upgrades like the examples above are not only ...

However, not all of the energy used in a particular process or device is useful. Some is always wasted, for example, as heat, sound, and light. The efficiency of a device is a measure of how much ...