What do the EPA considered high pressure refrigerant?

The Environmental Protection Agency (EPA) classifies high-pressure refrigerants as those that operate at pressures greater than 15 psig (pounds per square inch gauge) at a temperature of 32°F (0°C). Common examples of high-pressure refrigerants include R-134a and R-410A. These refrigerants are often used in various cooling and refrigeration systems, and their handling is regulated to minimize environmental impact and ensure safety.