R32refrigerantR32 Refrigerant
Lower-GWP pure HFC increasingly used in next-generation split AC and heat pumps (ASHRAE A2L).
About this refrigerant
R32 (difluoromethane, CH₂F₂) is a pure HFC with roughly one-third the GWP of R410A (675 vs 2088, IPCC AR4) and strong thermodynamic performance. It is widely specified for new residential and light-commercial split systems and many heat pumps.
ASHRAE classifies R32 as A2L — lower toxicity, mildly flammable with low burning velocity. Install and service only with A2L-rated components, correct charge limits and local code compliance. ODP is zero; POE lubricants are typical.
Applications
Next-generation split AC
Wall and multi-split units factory-charged or specified for R32.
Heat pumps
Air-source heat pumps designed for R32 efficiency and charge rules.
Light commercial AC
Small commercial packaged and ducted systems migrating from R410A to R32.
Technical properties
- Chemical name
- Difluoromethane
- Formula
- CH₂F₂
- CAS / ID
- 75-10-5
- Type
- Pure HFC
- Composition
- 100% R32
- Molecular weight
- 52.02 g/mol
- Boiling point (1 atm)
- −51.7 °C
- Critical temperature
- 78.1 °C
- ASHRAE safety class
- A2L
- ODP
- 0
- GWP (AR4, 100 yr)
- 675
- Typical lubricant
- POE (polyolester)
GWP values are IPCC AR4, 100-year. Typical published figures; confirm with product documentation for critical designs.
A2L refrigerant — follow manufacturer charge limits, ventilation and ignition-source rules. Confirm ACC cylinder stock.
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