Heat Stress Evaluation, Version 2.0 is the result of years of research and ISO studies in ergonomics in the work environment. The program utilizes the most up-to-date thermal indices for comfort situations (Predicted Mean Vote index) and for hot conditions (WBGT index and Required Sweat Rate index). It can analyze constant situations in addition to complex working conditions with intermittent exposures to different environments similar to those usually found in industry.