The PMV index predicts the mean response of a larger group of people according the ASHRAE thermal sense scale:
+1 slightly warm
-1 slightly cool
The PMV index is expressed by P.O. Fanger as
PMV = (0.303 e-0.036M + 0.028) L (1)
PMV = Predicted Mean Vote Index
M = metabolic rate
L = thermal load - defined as the difference between the internal heat production and the heat loss to the actual environment - for a person at comfort skin temperature and evaporative heat loss by sweating at the actual activity level
PPD - Predicted Percentage Dissatisfied Index
Predicted Percentage Dissatisfied - PPD - index is a quantitative measure of the thermal comfort of a group of people at a particular thermal environment.
Note! - at least aprox. 5% of people in a group will be dissatisfied with the thermal climate - even with PMV = 0.
Human physiology, air quality and comfort temperatures, activity and metabolic rates, health effects of carbon monoxide and more.
Clo is used as a measure of clothes thermal insulation.
Comfort vs. dry bulb, wet bulb and dew point temperature.
The resultant or globe temperature.
Equivalent heat index vs. air temperature and relative humidity - in degrees Fahrenheit and Celsius.
The influence of humidity on the apparent temperature and the heat index.
Specific heat of the human body - compared to substances like protein and wood.
Metabiolic Rate - Met - is used as a measuring unit for human body heat or power production.
Human metabolic heat gain in air conditioned rooms.
Working with relative values.
pH in human materials like blood, salvia and more.
Heat production from the human body vs. activity.
The Wet Bulb Globe Temperature can be used to measure the general Heat-Stress index.