What is the total CFM rating required to dry an affected area of 15120 CF using a desiccant dehumidifier rated at 385 CFM?

Boost your preparation for the IICRC Applied Structural Drying Exam. Review with multiple choice questions, flashcards, and detailed explanations. Enhance your readiness for the test!

To determine the total CFM (cubic feet per minute) rating required to effectively dry an affected area of 15,120 cubic feet using a desiccant dehumidifier rated at 385 CFM, it is essential to consider the necessary air turnover rate for optimal drying.

The air turnover rate refers to the number of times the entire volume of air in the space passes through the dehumidifier in one hour. To calculate the required CFM for drying, a common approach is to stay within a standard turnover rate for effective moisture removal, which can often be around 4 to 5 times the volume of the affected area per hour.

For a space of 15,120 cubic feet, at a turnover rate of 4 times per hour, the required airflow for drying can be calculated as follows:

  • First, multiply the volume of the affected area by the turnover rate:

15,120 CF x 4 = 60,480 CFH (cubic feet per hour).

  • Then, convert this value to CFM by dividing by 60 (the number of minutes in an hour):

60,480 CFH ÷ 60 = 1,008 CFM.

This shows that the dry air

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