Research on the Origins of Thermal Comfort

General thermal comfort is defined by certain thermal conditions that, on average, affect the environment in order to ensure comfort from its broader view. On the other hand, local thermal comfort focuses on the study of areas subject to special conditions like draft, asymmetric solar radiation and local perception of air quality. In these sense, and in accordance with ASHRA, ISO and NTP Standards, it is possible to improve comfort through relevant building structural modifications like thermal inertia, its own air conditioning facilities and people's habits like working periods. An adequate combination of all these variables will let an adequate indoor ambience. In present paper it was done a deep research about the principal works about general and local thermal comfort conditions based on results of scientific research and actual ISO and ASHRAE Standards. From this research it was concluded that general and local thermal comfort researches must be focused in relate field and simulation tests. These tests will let to predict the behaviour of indoor environments and, in consequence, to improve energy saving, material conservancy and work risk prevention. Finally, future research works are proposed like new Heating Ventilation and Air conditioning control systems that operate in accordance with these simulations.