Drain Water Heat Recovery Efficiency

Without storage capacity you ll only have useful energy during the simultaneous flow of cold water and heated drain water like while showering.

Drain water heat recovery efficiency.

By transferring some of the heat from the drain water to the incoming water through a heat exchanger reduced energy is required. A significant portion of the heat from the drainwater is. Drain water heat recovery to qualify as a drain water heat recovery system for use for compliance with applicable performance compliance credits the heat exchanging unit shall be certified to the energy commission according to the requirements contained in ra3 6 9 using the following declaration statement. Benefits energy savings a typical drain water heat recovery system can reduce your water heater s energy consumption by up to 25.

Extend the life of your water heater since the cold water entering your water heater is pre heated by the drain water. They generally have the ability to store recovered heat for later use. Drain water heat recovery saves energy simple systems have speedy payback the energy department estimates that energy losses in hot water amount to 80 to 90 a good argument for installing a drain water heat recovery dhr system. Efficient drain water heat recovery in horizontal domestic shower drains 1.

You ll need a unit with storage capacity for use with a dishwasher or clothes washer. Dwhr systems operate on the principle of heat exchange between the incoming cold water supply.