Discomfort Index (DI) of Thom and Its Variations

Parameters:

(1) dry bulb temperature (Ta) in °C

(2) wet bulb temperature (Tw) in °C

discomfort index of Thom =

= (0.4 * (dry bulb temperature)) + (0.4 * (wet bulb temperature)) + 8.3

The DI is reported in discomfort units (DU).

discomfort index of Sohar et al =

= (0.5 * (dry bulb temperature)) + (0.5 * (wet bulb temperature))

modified discomfort index (MDI) of Moran and Pandolf =

= (0.3 * (dry bulb temperature)) + (0.75 * (wet bulb temperature))