HVAC - EPA Certification Practice Exam 2026 - Free EPA Certification Practice Questions and Study Guide

R-134A is identified as a potential greenhouse gas primarily due to its high Global Warming Potential (GWP). It is a hydrofluorocarbon (HFC) used in various refrigeration and air conditioning applications. While it doesn't deplete the ozone layer like some older refrigerants, its ability to absorb infrared radiation contributes to the greenhouse effect, making it significant in discussions about climate change and environmental impact.

In contrast, R-22, while also an HFC, has been phased out in many areas due to its ozone-depleting properties. Ammonia is not classified as a greenhouse gas and is primarily known for its efficiency and lower environmental impact. Freon, which is a trade name for chlorofluorocarbons (CFCs), has even higher ozone-depleting potential and is not as commonly mentioned in discussions of greenhouse gases today. R-134A’s status in environmental regulations highlights the need for moving towards more sustainable refrigerants to mitigate global warming impacts.