A greywater heat recovery system is a type of renewable energy technology that captures the heat from waste water, known as greywater, and uses it to pre-heat fresh cold water before it enters a water heating system. Greywater is typically the waste water from activities such as showering, bathing, washing clothes, or washing dishes. This system works by transferring the heat from the outgoing greywater to the incoming cold water through a heat exchanger. By using this system, the energy that is usually wasted in water discharge can be utilized to reduce the energy required for heating water, thereby saving energy and reducing utility bills. Greywater heat recovery systems are considered environmentally friendly and can be installed in residential, commercial, or industrial buildings.
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