IICRC Applied Structural Drying Practice Exam

To determine the appropriate number of Air Filtration Devices (AFDs) needed for the given room size of 30 feet by 40 feet with a ceiling height of 8 feet, we first need to calculate the volume of the room. The volume can be calculated using the formula for volume, which is length × width × height.

In this case, the volume equals 30 feet × 40 feet × 8 feet, resulting in a total volume of 9600 cubic feet.

Next, IICRC guidelines typically suggest that one AFD can effectively handle a certain volume of air when operating at a specific airflow rate, which in this case is 700 CFM (cubic feet per minute). To evaluate the number of AFDs necessary, you would generally consider the recommended CFM coverage based on the room's volume and the required air changes per hour for effective drying or filtration.

Since AFDs can remove airborne contamination and improve air quality, having one unit in this scenario is deemed sufficient to manage the air quality effectively within the volume of the room. This is particularly true when considering that the airflow of 700 CFM can adequately circulate and filter the entire room's air multiple times in an hour, providing adequate coverage