IICRC Approved Calculations Sheets The following forms are approved for use during the listed exams. WRT/ASD US English Imperial Measurements Airmover and Gallons Calculation Worksheet Psychrometric Chart Initial Dehumidification Recommendation Factors and Formulas English Metric Measurements Airmover and Gallons Calculation Worksheet Psychrometric Chart Initial Dehumidification Recommendation Factors and Formulas Spanish Imperial Measurements Hoja De Trabajo […]