R410A is a near-azeotropic HFC (Hydrofluorocarbon) refrigerant blend consisting of R32 (50%) and R125 (50%). It was developed as a high-pressure alternative to R22, specifically for use in modern residential and commercial air conditioning and heat pump systems.
General Characteristics
- Environmental Profile: It has zero Ozone Depletion Potential (ODP = 0) and a Global Warming Potential (GWP) of 2088.
- Safety Classification: Rated as A1 by ASHRAE (Non-toxic and non-flammable).
- High Pressure: R410A operates at significantly higher pressures (approximately 60% higher) than R22. Therefore, it requires equipment specifically designed to handle these pressures and cannot be used as a retrofit for R22 systems.
- Temperature Glide: It is a near-azeotropic blend with an extremely low temperature glide (< 0.1 K), allowing it to behave much like a single-component gas.
- Efficiency: It offers excellent heat transfer properties and high refrigeration capacity, leading to more compact and energy-efficient HVAC units.
- Lubrication: It is compatible only with POE (Polyolester) synthetic oils.
Technical Specifications
| Property | Value |
| Components | R32 / R125 |
| Molecular Weight | 72.58 g/mol |
| Boiling Point (at 1 atm) | -48.5 °C (-55.3 °F) |
| Critical Temperature | 71.3 °C (160.3 °F) |
| Critical Pressure | 49.0 bar (710.7 psia) |
| Liquid Density (at 25°C) | 1060 kg/m³ |
| Vapor Pressure (at 25°C) | 16.5 bar (239.3 psia) |
| Safety Group | A1 |
Typical Applications
- Residential Air Conditioning: Split units, multi-splits, and window ACs.
- Commercial HVAC: Chillers, rooftop units, and VRF (Variable Refrigerant Flow) systems.
- Heat Pumps: Domestic and industrial heating systems.