Editorial method
Regulatory statements are based on current U.S. EPA MVAC and Section 608/609 overlap resources. Provider-specific details link to the live approved-program list instead of being guessed.
Practice method
Questions are original scenarios mapped to six federal knowledge areas. The practice center does not claim that all approved programs use one universal question count or time limit.
Update method
When EPA changes a program list, equipment standard, refrigerant rule, or shop requirement, the guide, source directory, structured data, and sitemap date should be updated together.