IMPORTANT - This version of the tool (v2.0.0) complies with the ASHRAE 55 2017 Standard. This version is no longer supported and may contain errors that have been fixed in newer releases. Please visit the CHANGELOG page to find out more.

CBE Thermal Comfort Tool for ASHRAE-55
Compare comfort conditions
Air temperature
°C °C °C
Mean radiant temperature
°C   °C   °C  
Air speed
m/s m/s m/s
Relative humidity
% % %
Metabolic rate
met met met
Clothing level
clo clo clo
#1 #2 #3
PPD % % %
SET °C   °C   °C  
Dry-bulb temp at still air °C °C °C
Cooling effect °C °C °C