In 1997 ASHRAE published the ASHRAE Thermal Comfort Tool to provide a simplified, consistent method for evaluating thermal comfort under a range of thermal conditions. The software is consistent with ASHRAE Standard 55-1992 and indicates whether a set of environmental conditions is in compliance with that standard. ASHRAE subsequently published ASHRAE Standard 55-2004, which incorporates several important changes from Standard 55-1992. The purpose of this project was to make several important changes to the existing ASHRAE software so that it is consistent with the 2010 version of the standard.

The most fundamental changes to the software were to change the basis for compliance with Standard 55-2010 to PMV rather than ET and to include the adaptive model, however many changes were made to the software to make it consistent with 55-2010 and to improve the user interface.

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