Localized discomfort of the human body - or over-generalized discomfort It is not very common to discuss the localized thermal discomfort with quantifiable measures. Traditionally, thermal comfort is expressed as either a vote-like metric such as Predicted Mean Vote (PMV) or temperature-like metric such as physiologically equivalent temperature (PET). Using environmental parameters (air temperature, relative humidity, mean radiant temperature and air velocity) and personal variables (metabolic rate and clothing factor), the human body is modelled either as a two-node heat budget model where the surface of the occupants are assumed to be at consistent temperature.