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Superheat The difference in temperature between the boiling refrigerant and the suction line temperature is known as superheat. Superheat is the sensible heat added to the vapor refrigerant after the change of state has taken place. (Heat added to refrigerant after it is in a vapor state) Superheat is the method of checking to see when a refrigerant coil has a proper level of refrigerant. When a metering device is not feeding enough refrigerant to the coil, the coil is said to be a starved coil and the superheat is greater. Sensible Heat = Heat that causes a change in the level of a thermometer. Latent Heat = Heat energy that is absorbed or rejected when a substance is changing state and there is no change in temperature. A change in state (example) from a liquid to a vapor with no change in temperature. (a change in state without a change in temperature)

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