Properties and Characteristics

Table 1. Comparisons between R32 and R410A

PROPERTIES R32 R410A
Boiling point -51.7°C -51.0°C
Critical temperature 78.4°C 72.0°C
Saturation pressure at 4°C 818kPa 806kPa
Saturation pressure at 40°C 2380kPa 2337kPa
Global warming potential 675 2088
Flammability rating A2L lower flammability A1 non-flame propagation

Note: R32 systems tend to have a smaller charge size than R410A. The effective reduction in GWP is about 75 per cent.

Table 2. Safety groups as determined by flammability and toxicity (AS/NZS ISO 817)

FLAMMABILITY CLASS SAFETY GROUP
Higher flammability A3 B3
Flammable A2 B2
R32 Lower flammability A2L B2L
No flame propagation A1 B1
  Lower Toxicity Higher Toxicity

Table 3. Characteristics of R32

CHARACTERISTICS
Non-Toxic
Hydrofluorocarbon (HFC) gas
Oil: POE (Poly Olester Oil)
Non-ozone depleting

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