Climate chamber studies: The aim of these studies is to
determine steady-state thermal comfort models. The research
is conducted in an environmental test chamber that can vary
different climatic parameters. The personal variables (clothing
insulation and metabolic rate) are determined by the task, and
are normally assumed to be fixed. The most important reason
to use such a steady-state situation is the ability to produce
the desired environmental conditions (air temperature, radiant
temperature, air velocity, humidity) while controlling
unwanted variables, which might influence the results. This
method has also led to transient body temperature tests which
examine body core and skin temperature to estimate comfort
perceptions