Water heat recycling

Water heat recycling (also known as drain water heat recovery, waste water heat recovery, greywater heat recovery, or sometimes shower water heat recovery) is the use of a heat exchanger to recover energy and reuse heat from drain water from various activities such as dishwashing, clothes washing and especially showers. The technology is used to reduce primary energy consumption for water heating by preheating the water and putting less strain on the designated water-heating unit, which can extend the life of your water heater and save on energy usage. On a smaller scale, water heat recycling can save a significant amount of energy in household application due to the reduction of need of external energy. If done on a larger scale, this reduction of energy usage could help ease climate change because it would reduce the dependence on fossil fuels. For this reason, many scholars look to water heat recycling as the future of energy efficiency for benefits both economical and environmental.