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| Characteristics of natural refrigerant CO2 | |||
| ODP* | GWP** | ||
| CO2 | Natural refrigerant | 0 | 1 |
| R410a | HFC | 0 | |
| R407c | HFC | 0 | |
| R134a | HFC | 0 | |
| R22 | HCFC | 0.055 | |
| * Ozone destruction potential | |||
| ** Global warming potential | |||