Air conditioners (ACs) commonly use **refrigerant gases** to absorb and release heat. The type of gas depends on the model and age of the AC unit. Here are the most common ones:
1. **R-22 (Chlorodifluoromethane)** – Older AC units (being phased out due to ozone depletion).
2. **R-410A (Puron)** – Common in newer units; more environmentally friendly than R-22.
3. **R-32** – Newer, more energy-efficient, and has a lower global warming potential (GWP) than R-410A.
4. **R-134a** – Used in some specific AC systems and refrigeration units.
Would you like to know which is best for home use or for a specific model?