High efficiency heat exchanger system with glycol and refrigerant loops

摘要: A condensing gas furnace/heat exchange system is provided which includes two subsystems. first subsystem an outdoor coil, indoor a reversing valve and compressor, the heat medium thereof liquid refrigerant, such as freon. This operative in heating, heat-augmented heating cooling modes of operation, heat-augmenting mode burners provide additional BTU's to system. The other coil pump, but excludes compressor or valve, utilizes heat-exchange water, ethylene glycol, glycol per se nonrefrigerant. pump merely pumps through absorbs heat/BTU's from flames burner are eventually transferred by associated dwelling like.