Describes factors influencing thermal comfort including temperature and radiation, relative humidity, air speed and turbulence, clothing, other parameters, and the perception of thermal comfort.

Describes how carbon dioxide is metabolically produced and can therefore be associated with the presence of occupants. Also it is relatively easy and inexpensive to measure, and it is fairly stable. In principle CO2 can be used to evaluate the ventilation rate, determine the proportion of outdoor air that is blended with recirculated air and provide an indication of perceived indoor air quality.