What is the accepted refrigerant for modern HVAC systems?

The accepted refrigerant for modern HVAC systems is R-410A. This refrigerant is a hydrofluorocarbon (HFC) that was specifically designed to be a more environmentally friendly replacement for R-22, which has been phased out due to its ozone-depleting potential. R-410A operates at a higher pressure than R-22, making it more efficient and effective in cooling applications.

Furthermore, R-410A does not contain chlorine, which is harmful to the ozone layer, aligning with global efforts to reduce substances that contribute to climate change. In contrast, R-22 is being phased out, R-134A is primarily used in automotive systems, and R-404A is typically found in commercial refrigeration applications rather than residential HVAC systems.

Overall, R-410A has become the standard in new heating, ventilation, and air conditioning installations due to its efficiency, minimal environmental impact, and compliance with current regulations.