R-410A (Puron) Pressure at 135°F — Saturation P-T Data
How This Was Calculated
Saturation pressure interpolated from ASHRAE tabular data for R410A. Very high pressure — elevated condensing conditions.
- P_sat
- Saturation pressure: 519 PSI
- T_input
- Input temperature: 135°F
- T_data
- ASHRAE tabular reference data: R410A
Important Considerations
At 135°F, R410A reaches 519 PSI — well above the 450 PSI threshold. This is an extreme condensing condition. Verify system high-pressure cutout is properly set and functional. Check for blocked condenser airflow, dirty coil, or refrigerant overcharge. Operating at sustained high pressure significantly reduces compressor life and increases risk of safety relief valve opening.
135°F is an extreme operating temperature — above the rated ambient limit for most residential HVAC equipment (typically 115–120°F). At this condition, R410A reaches very high saturation pressure which stresses compressor windings and discharge valves. Most manufacturers void warranty for operation above rated ambient. Consider condenser shading, pre-cooling, or equipment with expanded ambient ratings for installations in direct sun in hot climates.
The saturation pressure shown (for R410A at 135°F) is the baseline for measuring superheat and subcooling. Suction superheat = suction line temperature minus evaporator saturation temperature. Subcooling = condensing saturation temperature minus liquid line temperature. Typical targets: 8–12°F superheat at the evaporator (TXV systems), 10–20°F subcooling at the condenser. Deviations indicate improper charge, metering device issues, or non-condensables.
R-410A is classified A1 (non-toxic, non-flammable) by ASHRAE Standard 34. It can be handled with standard HVAC practices. However, rapid release can displace oxygen in enclosed spaces. Always work in ventilated areas. EPA Section 608 certification is required for purchase and handling.
R410A has a GWP of 2,088 — meaning 1 lb released equals 2,088 lbs of CO2 equivalent warming over 100 years. This places it in the high-GWP category subject to accelerated phase-down under the AIM Act (American Innovation and Manufacturing Act). EPA regulations are reducing HFC production and import allowances through 2036. Lower-GWP alternatives are available: R-32 (GWP 675), R-454B (GWP 466), and R-290 (GWP 3) depending on application.
Saturation pressure-temperature data for R410A derived from ASHRAE Fundamentals Handbook, Chapter 30 (Thermophysical Properties of Refrigerants), and verified against manufacturer published data (Chemours Opteon, Honeywell Solstice). Values represent saturated conditions at sea level.