IICRC Commercial Drying Specialist (CDS) Practice Test 2026 - Free CDS Exam Practice Questions and Study Guide

To effectively control the drying environment, it is crucial to avoid bringing unconditioned outside air into the workspace. Introducing outside air can significantly affect the temperature and humidity levels inside the drying area. This outside air may be moisture-laden, which would increase the relative humidity within the space, counteracting the effectiveness of dehumidification efforts. A stable and controlled indoor environment is essential for efficient drying, as it allows equipment to function optimally and removes moisture consistently.

Utilizing various types of dehumidifiers, maintaining specific humidity levels, and using appropriate amounts of drying equipment can be beneficial when applied correctly. Therefore, the specific action of introducing outside air, which is typically uncontrolled in terms of moisture content, is a critical factor to avoid for effective drying.