Yes, a residential heat pump operates using refrigerant—historically referred to by the brand name Freon—which circulates through a closed-loop copper tubing system to transfer thermal energy between the indoors and outdoors. While older heat pump systems utilized R-22 Freon (chlorodifluoromethane), which has been phased out due to environmental regulations regarding ozone depletion, modern residential heat pumps use eco-friendly alternative refrigerants like R-410A or R-32. Regardless of the specific chemical compound used, the thermodynamic function remains identical: the refrigerant changes state from liquid to gas, absorbing heat from one environment and releasing it into another. You can verify your specific refrigerant type by checking the manufacturer data plate located on the outdoor condensing unit housing.
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