The ECU Desuperheater is connected to a water heater and an air conditioner, heat pump, or refrigeration compressor. A small pump circulates “cold” water from the bottom of the water heater tank through the heat exchanger within the ECU where it interacts with the hot refrigerant gas from the compressor via a heat exchanger. The resulting heated potable water is then pumped back to the water heater or in many commercial situations a pre-heater storage tank. The commercial unit comes in sizes to match your existing AC units or refrigeration units. Reclaiming waste heat from high compressor discharge temperatures is a proven principle of energy recycling that produces abundant hot water safely and economically and as a by-product will increase the SEER of the AC it is connected to.