FREE TOOL IICRC S500 STANDARD MATH
Dehumidifier Requirement
Calculator
Calculate the exact AHAM pints required to dry a structural loss based on IICRC S500 Class definitions.
Room Dimensions
Water Class
Total Volume (Cu Ft)
0
Required AHAM Pints / Day
0
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Dehumidifier Calculator
What is the formula for calculating dehumidifiers?
According to IICRC standards, the foundational formula is: Volume (Cubic Feet) ÷ Class Factor = Required AHAM Pints. Class 1 factor is 100, Class 2 factor is 50, Class 3 factor is 40.
What does AHAM mean?
AHAM rating is the standard measurement for dehumidifier capacity. It represents the number of pints of moisture a unit can remove from the air in 24 hours at exactly 80 degrees Fahrenheit and 60% relative humidity.