health effects of heat and air conditioned environment
No radiant heat gain or loss occurs when the temperature of surrounding objects is the same as the skin temperature (about 35Â°C). Convection is the process by which the body exchanges heat with the surrounding air. The body gains heat from hot air and loses heat to cold air which comes in contact with the skin. Convective heat exchange increases with increasing air speed and increased differences between air and skin temperature.
In this way, the body increases the rate of heat loss to balance the heat burden. In a very hot environment, the rate of heat gain is more than the rate of heat loss and the body temperature begins to rise. A rise in the body temperature results in heat illnesses.