Calculates Predicted Mean Vote (PMV) and Predicted Percentage Dissatisfied according to ISO 7730. Results are calculated from the inputs of air temperature, mean radiant temperature, relative humidity, air velocity, clothing thermal resistance and metabolic rate. Built in calculators are included to assist in determing clothing thermal resistance and metabolic rate. Optimisation routines are provided for determining required air temperature or mean radiant temperature for good thermal comfort. Shareware evaluation version is fully functional with 21 day time limit.