Sewage Heat Recovery

Water heat recycling (also known as sewage heat recovery, drain water heat recovery, wastewater 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 wastewater. This can be done at large scale (as in sewage heat systems) down to household systems for heat recovery from activities such as dish-washing, clothes washing and especially showers. The technology is used to reduce primary energy consumption for water heating.

- Adapted from Wikipedia

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Map of wastewater heat recovery potential from sewage systems. The larger sewer trunk lines provide possible sources of heat for transfer to district energy systems (as in South East False Creek) or other users. Click here for more details. Credit: Adapted from Compass Resources Management Ltd. (2005) data by R. Tooke.