R-410A Refrigerant Guide
The Industry Standard for Residential & Light Commercial AC
R-410A Phase-Down in Progress
Under the AIM Act, R-410A production is being reduced. New equipment is transitioning to R-454B and R-32. Existing R-410A systems can still be serviced, but refrigerant prices are expected to rise.
What is R-410A?
R-410A (also known as Puron, AZ-20, Genetron R410A, or Suva 410A) is a hydrofluorocarbon (HFC) refrigerant blend that became the standard replacement for R-22 in residential and light commercial air conditioning systems starting in 2010.
It's a near-azeotropic blend of R-32 (50%) and R-125 (50%), which means it behaves almost like a pure refrigerant and can be topped off without significant composition change.
Advantages
- ✓ Higher cooling capacity than R-22
- ✓ Better energy efficiency
- ✓ Non-flammable (A1 safety class)
- ✓ Zero ozone depletion (ODP = 0)
- ✓ Can be topped off (near-azeotropic)
Disadvantages
- ✗ High GWP (2088) - being phased down
- ✗ Higher operating pressures than R-22
- ✗ Not compatible with R-22 systems
- ✗ Requires POE oil (not mineral oil)
- ✗ Price increasing due to phase-down
Technical Properties
| Chemical Formula | CH₂F₂ + CHF₂CF₃ (50/50) |
| Molecular Weight | 72.6 g/mol |
| Boiling Point (1 atm) | -48.5°C (-55.3°F) |
| Critical Temperature | 71.4°C (160.5°F) |
| Critical Pressure | 4901 kPa (711 psia) |
| Safety Classification | A1 (Non-toxic, Non-flammable) |
| GWP (100-year) | 2088 |
| ODP | 0 |
| Lubricant Type | POE (Polyolester) |
| Temperature Glide | <0.2°C (near-azeotropic) |
R-410A Pressure-Temperature Chart
Full Chart →| Temp °F | Temp °C | Pressure (psig) | Pressure (kPa) |
|---|---|---|---|
| 30°F | -1.1°C | 102 psig | 806 kPa |
| 35°F | 1.7°C | 112 psig | 876 kPa |
| 40°F | 4.4°C | 118 psig | 915 kPa |
| 45°F | 7.2°C | 130 psig | 998 kPa |
| 50°F | 10°C | 143 psig | 1088 kPa |
| 80°F | 26.7°C | 222 psig | 1633 kPa |
| 100°F | 37.8°C | 317 psig | 2288 kPa |
| 110°F | 43.3°C | 366 psig | 2626 kPa |
| 120°F | 48.9°C | 418 psig | 2984 kPa |
| 130°F | 54.4°C | 475 psig | 3377 kPa |
Blue = typical evaporator temp, Orange = typical condenser temp
R-410A vs R-22 Comparison
| Property | R-410A | R-22 |
|---|---|---|
| Operating Pressure (high side) | ~400 psig | ~250 psig |
| Operating Pressure (low side) | ~120 psig | ~70 psig |
| Lubricant | POE Oil | Mineral Oil |
| ODP | 0 | 0.055 |
| GWP | 2088 | 1810 |
| Status | Phase-down 2024+ | Phased out 2020 |
Warning: R-410A cannot be used as a drop-in replacement for R-22. Systems designed for R-22 cannot handle the higher pressures of R-410A and use incompatible lubricants.
R-410A Phase-Down Timeline (AIM Act)
2020 - Before Phase-Down
R-410A at peak production, standard for all new AC equipment
2024 - 40% Reduction
HFC production cut by 40%. New equipment begins transitioning to R-454B/R-32
2025 - GWP Limits Take Effect
New residential AC must use refrigerants with GWP ≤700. R-410A (GWP 2088) no longer allowed in new equipment
2029 - 70% Reduction
HFC production cut by 70%. R-410A availability significantly limited
2036 - 85% Reduction
HFC production at 15% of baseline. R-410A for service only
R-410A Replacement Options
- • GWP: 466 (78% lower)
- • A2L mildly flammable
- • Similar performance to R-410A
- • Leading replacement choice
- • GWP: 675 (68% lower)
- • A2L mildly flammable
- • Higher efficiency
- • Common in mini-splits
Note: R-454B and R-32 are A2L (mildly flammable) refrigerants. Technicians should complete A2L safety training before handling these refrigerants.
R-410A Charging Guidelines
Charging Procedures
- Always charge as a liquid from cylinder
- Use manifold rated for 800 psig minimum
- Target subcooling: 10-15°F (TXV systems)
- Target superheat: 8-14°F (fixed orifice)
- Can be topped off (near-azeotropic)
Important Notes
- Never mix with other refrigerants
- Use only POE oil (not mineral oil)
- Keep system dry - POE absorbs moisture
- Evacuate to 500 microns or less
Cylinder Identification
R-410A
Rose/Pink
ARI Standard 34 color code. Always verify refrigerant type on cylinder label.