Controlled humidity works to achieve occupant thermal comfort but not in all cases he said. The ASHRAE Thermal Comfort Tool3 is permitted to be used to comply with this section. Operative Temperature Indoor Environmental Quality With Energy Efficiency This web-based tool for thermal comfort calculations according to ASHRAE Standard 55-2020 is developed at the University of California at Berkeley. . Outer range of air temperatures. See the Master List for all commercial resources Air Movement. Comfort Chart defines values for the title scale type Comfort Points and comfort zone that are fields in the Comfort Chart Definition dialog box. ANSIASHRAE Standard 55-2010 Thermal Environmental Conditions for Human Occupancy. ANSIASHRAE Standard 55-2017 Thermal Environmental Conditions for Human Occupancy simplifies the language of the 2013 standard and clarifies the three comfort. The method used yields the same results.