Energy conserving water heating system

摘要

Incoming cold water is delivered to a storage tank upstream from the customary domestic hot water heater. Waste heat recovery coils are located in the furnace flue and on the outlet of an air conditioning condenser unit. A system pump upstream from the water heater and between it and the storage tank circulates water from the storage tank through the two coils and back into the water inlet line leading to the water heater in a preheated state enabling the thermostatic setting of the water heater to be set at a significantly lower level than is customary.