HVAC - EPA Certification Practice Exam 2025 - Free EPA Certification Practice Questions and Study Guide

The Clean Air Act is a significant piece of legislation aimed primarily at controlling air pollution on a national level. One of its key purposes concerning HVAC systems is to regulate the use and release of ozone-depleting substances. This was driven by concerns over the depletion of the ozone layer, which protects the Earth from harmful ultraviolet radiation.

Within the context of HVAC systems, substances such as chlorofluorocarbons (CFCs), frequently used as refrigerants, have been identified as major contributors to ozone depletion. The Clean Air Act establishes rules and regulations that limit the production and consumption of these harmful compounds. By enforcing these regulations, the Act plays a critical role in protecting the atmosphere and promoting the use of alternative refrigerants that do not harm the ozone layer.

The other options, while relevant to broader environmental and energy concerns, do not directly address the specific mandate of the Clean Air Act in relation to HVAC systems and their impact on air quality and ozone depletion.