By transferring some of the heat from the drain water to the incoming water through a heat exchanger reduced energy is required.
Drain water heat recovery efficiency.
Extend the life of your water heater since the cold water entering your water heater is pre heated by the drain water.
You ll need a unit with storage capacity for use with a dishwasher or clothes washer.
Benefits energy savings a typical drain water heat recovery system can reduce your water heater s energy consumption by up to 25.
Without storage capacity you ll only have useful energy during the simultaneous flow of cold water and heated drain water like while showering.
Flexibility a drain water heat recovery system.
They generally have the ability to store recovered heat for later use.
Efficient drain water heat recovery in horizontal domestic shower drains 1.
Dwhr systems operate on the principle of heat exchange between the incoming cold water supply.
A significant portion of the heat from the drainwater is.
Drain water heat exchangers can recover heat from the hot water used in showers bathtubs sinks dishwashers and clothes washers.