Target Subcooling Calculator
Calculate subcooling from saturation temperature and measured liquid line temperature for TXV system charging checks.
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Frequently asked questions
What is subcooling in HVAC?
Subcooling is the amount a liquid refrigerant is cooled below its saturation temperature. It indicates how much liquid refrigerant is available leaving the condenser.
When should I use subcooling to charge a system?
Subcooling is primarily used to charge systems with TXV metering devices. It ensures the correct amount of liquid refrigerant is present.
How do I calculate subcooling?
Subcooling is calculated by subtracting the measured liquid line temperature from the saturation temperature derived from high-side pressure.
What is a normal subcooling value?
Typical subcooling values range from 8°F to 15°F, but always follow the manufacturer’s specifications for the system being serviced.
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