Certified Indoor Environmental (CIE) Practice Exam

The key idea here is recognizing what the acronym CAFS represents. In credential naming, CAFS is used for a title that focuses on air filtration. The phrase that matches the acronym most precisely is “Certified Air Filter Specialist,” because each word aligns with the letters C-A-F-S: Certified, Air, Filter, Specialist. This signals expertise specifically in filters—their types, selection, installation, replacement schedules, and how they influence indoor air quality and HVAC performance.

The other options don’t fit the acronym or the scope. A title with “Supervisor” suggests a leadership role rather than a technical filtration specialty. A term like “Certified Filtration Specialist” omits the crucial “Air,” which is essential when the focus is on filtration within air systems. “Certified Airflow Systems” points more to system design and airflow, not the filtration element.