> For the complete documentation index, see [llms.txt](https://cbe-berkeley.gitbook.io/thermal-comfort-tool/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://cbe-berkeley.gitbook.io/thermal-comfort-tool/changelog/changelog.md).

# Changelog

## Version 2.5.6 (2025-08-20)

* feat: change the default color of the comfort zone chart to green
* fix: calculation of comfort zone chart with PMV model
* fix: secant calculation crashing the tool
* fix: issue #84 compare tab
* feat: added siteimprove analytics to the tool

## Version 2.5.5 (2024-03-04)

This version complies with the ASHRAE Standard 55-2023.

## Version 2.5.4 (2023-09-20)

This version complies with the ASHRAE Standard 55-2020. You can access this version of the tool using [this link](https://comfort-tool-ashrae-55-2020-version-6ncu37myea-uc.a.run.app/). Please note that this version is no longer supported and may contain errors that have been fixed in newer releases.

## Version 2.5.3 (2023-09-20)

Fix:

* issue calculation PMV when cooling effect is 0

## Version 2.5.2 (2023-09-20)

Fix:

* issue with e\_max == 0

## Version 2.5.1 (2023-09-20)

Fix:

* Cooling Effect calculation

## Version 2.5.0 (2023-06-23)

Fix:

* Updated coefficient of dilation in SET model

## Version 2.4.2 (2022-03-23)

Fix:

* Hiding globe temperature calculator when operative temp is selected

## Version 2.4.1 (2022-03-23)

Fix:

* Issue with operative toggle in adaptive model

## Version 2.4.0 (2022-03-23)

Fix:

* Upload tool was not using dynamic clothing
* Calculation of CE was done for a sitting person without using dynamic clothing

## Version 2.3.1 (2021-07-30)

Fix:

* Fix equation to calculate radiative heat transfer coefficient in SET equation

Features:

* Assuming that a person is sitting when calculating SET temperature

## Version 2.3.0 (2021-07-29)

Features:

* Added PHS model
* Added fan heatwaves model

## Version 2.2.0 (2021-07-14)

Fix:

* Error calculation of PMV in EN tab

Features:

* Improved tooltip look

## Version 2.1.7 (2021-04-16)

Features:

* Improved documentation and made charts responsive

## Version 2.1.6 (2021-04-09)

Fix:

* Removed old vertical temperature gradient calculator

## Version 2.1.5 (2021-04-06)

Fix:

* Local discomfort tab the code was broken

## Version 2.1.4 (2021-03-30)

Fix:

* Spinner behavior compare tab
* Units in note under range chart
* dilation coefficient in SET equation

Features:

* Implemented test for all the major functions
* Added `bumpversion` to track version of the tool

## Version 2.1.3 (2021-03-17)

Features:

* Changed compliance from ASHRAE 55 2017 to ASHRAE 55 2020

## Version 2.1.2 (2021-03-11)

Fix:

* Equation to calculate heat transfer coefficient SET equation.
* Default value of clo and met dropdown now matches the default input value.

Features:

* Wrote testing for ERF, SET and PMV equations

## Version 2.1.1 (2021-02-04)

Fix:

* Error calculation SHARP and solar altitude supine person.

## Version 2.1.0 (2020-10-19)

Features:

* Changed limit for elevated air speed calculation from 0.2 m/s to 0.1 m/s.

## Version 2.0.6 (2020-09-08)

Features:

* Fixed minor issue in the erf equation. Updated fp tables and E\_diff equation.

## Version 2.0.5 (2020-09-04)

Features:

* Fixed issues with calculation of outputs in the Upload tool and removed link to Codelab
* Added SET chart, which displays SET outputs as a function of the inout variables selected
* Added a note below SET chart
* Added a note below PMV heat loss chart
* Minor edits to the layout of the comfort tool

## Version 2.0.4 (2020-07-17)

Features:

* Displaying the relative air speed and dynamic clothing among the outputs.

Fix:

* Fixed calculation comfort zone in Ranges

## Version 2.0.3 (2020-06-24)

Features:

* The Upload tool can be used to calculate LEED compliance.
* The Share button now also shares the chart type.
* Added notes about relative air speed and dynamic clothing calculation below charts.
* Added mean radiant temperature as input in the SolarCal tool.

Fix:

* Share fixed the issue with air speed and clothing.
* Changes y-label in chart air speed vs operative temperature.

## Version 2.0.2 (2020-06-09)

Features:

* The [dynamic clothing insulation](https://center-for-the-built-environment.gitbook.io/thermal-comfort-tool/documentation/pmv#dynamic-clothing-insulation) is automatically calculated by the tool.

Fix:

* Upload was throwing error for files with more than 1000 inputs.
* Improved calculation speed for Upload tool.

## Version 2.0.1 (2020-06-05)

Features:

* The [relative air speed](https://center-for-the-built-environment.gitbook.io/thermal-comfort-tool/documentation/pmv#air-speed) is automatically calculated by the tool.
* Added Save, Restore and Share button.
* Added tooltips to provide additional information to the user.

Fix:

* Upload not does not throw an error if the cooling effect cannot be calculated.
* Upgraded to new version of pythermalcomfort.
* Fixed issue solar gain calculation with IP units.

## Version 2.0.0 (2020-05-06)

This version complies with the ASHRAE Standard 55-2017. You can access this version of the tool using [this link](https://comfort-tool-63o6tweb2a-uc.a.run.app). Please note that this version is no longer supported and may contain errors that have been fixed in newer releases.

Features:

* Navigation bar responsive.
* Created new documentation website.

Fix:

* Issue with HeatLoss chart.