Use this R-410A pressure-temperature chart to convert saturation temperature to gauge pressure. R-410A is a near-azeotropic blend with about 0.2°F of temperature glide, so routine field references use a single saturation-pressure column for both superheat and subcooling calculations.
Quick Temperature Lookup
Results
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Saturation Pressure (psig)
~0.2°F
Temperature Glide
Pressure-Temperature Chart
Highlighted rows indicate a common residential cooling saturation range. R-410A is near-azeotropic, so a single saturation-pressure column is used for routine field reference.
Temp (°F)
Saturation Pressure (psig)
Highlighted rows = common residential cooling saturation range. Pressure values: National Refrigerants R-410A reference guide; cross-checked against published equipment data.
Superheat and Subcooling Targets
How to use these targets
Superheat is measured at the suction line near the indoor coil. Subcooling is measured at the liquid line leaving the condenser. Use superheat and subcooling with the correct charging method for the metering device and the equipment manufacturer. Do not diagnose charge from pressure alone.
Superheat, What to Use in the Field
Fixed orifice / piston systems
Use target superheat from indoor wet-bulb + outdoor dry-bulb
TXV / EEV systems
Verify superheat, but charge to manufacturer subcooling
High superheat
Check charge, load, airflow and restrictions
Low superheat
Check overfeeding, airflow and metering-device operation
Subcooling, What to Use in the Field
TXV / EEV systems
Use the manufacturer-specified target subcooling
Fixed orifice systems
Charge by target superheat; use subcooling as a diagnostic check
High subcooling
Check overcharge and liquid-line restriction
Low subcooling
Check undercharge, flashing and liquid-line conditions
Field Diagnosis Reminder
Suction / discharge pressures
Do not use as standalone charge targets
Evaporator saturation
Interpret with indoor load and airflow
Condenser saturation
Interpret with outdoor ambient and coil condition
Before adjusting charge
Verify airflow, metering device, temperatures and manufacturer data
Key R-410A Properties
Refrigerant type
HFC blend (R-32/R-125)
Lubricant type
POE oil
Temperature glide
~0.2°F (near-azeotrope)
Critical pressure
~711 psia (absolute)
R-410A Phase-Out Notice
R-410A is being phased down under EPA regulations, but service refrigerant remains legal for existing systems. Federal equipment-installation rules changed in May 2026, and state rules can differ. For the current contractor-facing breakdown, see the R-410A rule update.