Superheat and Subcool

Superheat or subcool from line temperature and pressure.

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Example

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You get

Details, formula, and sources

Superheat = suction-line temperature − saturation temperature at suction pressure. Subcool = saturation temperature at liquid-line pressure − liquid-line temperature.

Classical refrigeration cycle; manufacturer P-T tables for the saturation lookup.

Refrigeration-cycle texts free at university OCW; manufacturer P-T tables free per refrigerant-pt.

Estimate. AHJ and licensed mechanical contractor govern. ACCA Manual J / D / S supersede rules of thumb.

Field names used by the API: refrigerant, system_pressure_psig, line_temperature_F, mode, saturated_temperature_F, superheat_F

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