HotSpot heat recovery systems convert any refrigeration compressor into a CHP (combined heat and power) system which provides the mechanical power to run a compressor while at the same time producing free thermal energy to make hot water, all from the same initial amount of energy input. The waste heat recovery system also makes the compressor system operate more efficiently and the compressor will use less electricity when the heat recovery unit is active. Waste heat energy recovery systems use a desuperheater for water heat recovery, sometimes called a waste heat exchanger. The heat recovery units are designed for waste heat recycling in order to convert a standard boiler into a heat recovery boiler. The waste heat recovery systems for water heating use a double wall, vented all copper heat reclaim heat exchanger to convert a normal heat pump into a heat recovery heat pump. HotSpot products are based on air conditioning heat recovery and work with all refrigerant compressor systems including AC, refrigerator, freezer and heat pumps. In addition to commercial or residential water heating, HotSpot products are suitable for space heating in facilities where a large number of refrigeration compressors operate. HotSpot titanium heat recovery pool heaters can heat pools with no additional energy to provide free pool heating.