Certified Safety Professional Practice Exam

The type of biological safety cabinet that provides partial containment is indeed Class 1. Class 1 biological safety cabinets are designed to offer a basic level of protection for the operator by drawing air into the cabinet and filtering it through a HEPA filter before it is exhausted. This type of cabinet protects the operator and the environment from exposure to airborne contaminants but does not provide protection for the materials or products being handled inside the cabinet.

This makes it different from Class 2 cabinets, which provide both operator and product protection through a combination of HEPA-filtered intake air and laminar airflow within the work area. On the other hand, Class 3 cabinets offer complete containment and are designed for high-risk pathogens, featuring sealed environments and decontamination processes. Class 4 cabinets provide the highest level of protection, suitable for the most hazardous biological agents, also emphasizing total containment.

Thus, Class 1 cabinets are specifically characterized by their partial containment features, serving certain safety purposes while lacking the comprehensive protective measures offered by higher classes.