NAFA Certified Air Filter Specialist (CAFS) Practice Exam 2025 - Free CAFS Practice Questions and Study Guide

In cleanroom environments, effective air filtration is crucial to maintain strict cleanliness standards, which is why understanding the types of filters used is important. The correct answer highlights two commonly utilized types of cleanroom filters: the roomside replaceable ceiling module and the fan powered module.

The roomside replaceable ceiling module is designed to allow for easy maintenance and filter replacement without disrupting the cleanroom environment. It can be accessed from the cleanroom side, minimizing contamination risk during filter changes. The fan powered module, on the other hand, integrates fans that assist in circulating the air and ensuring an adequate airflow to the cleanroom while filtering out contaminants.

Together, these systems provide not just filtration but also controlled airflow, which is essential for maintaining the cleanliness levels required in sensitive environments.

In contrast, the other options present various types of filters that, while critical in different contexts, do not specifically focus on the structure and function required for cleanroom applications. For instance, HEPA and ULPA filters are types of high-efficiency filters but don't address the cleanroom module designs. Similarly, pre-filters and final filters as a choice indicate a broader filtration system rather than the specific configurations used in cleanrooms. Activated carbon and electronic filters serve different purposes,