EPA 608 Certification is a federal requirement for any individual who handles or purchases refrigerants like R410A or the new R454B. This certification ensures that technicians know how to properly recover, recycle, and handle these gases to protect the ozone layer. While our DIY mini splits are designed for homeowner installation, most traditional units require a certified pro to complete the connection. We provide technical resources for certified techs on our help page. Maintaining a leak-free system is part of being an environmentally responsible homeowner. Always verify your installer's EPA credentials for any non-DIY project.