Skip to main content

How can I choose between the 99th and 99.6th percentile outdoor design temperature (ODT)?

​heatpunk.co.ukThis guide applies to Heatpunk UK. 

Choosing the 99.6th percentile ODT means that no additional uplift is needed for intermittent heating or exposed locations. 


Choose default for oneall project:new projects your Pro team make:

Navigate​For Pro teams only

An admin or owner can navigate to yourTeam projectpreferences > PlansDesign task.tab Click> the 3 dots in the top right corner to view moreand optionsedit thendefault selecttemperatures. temperature

configuration.

With either postcode lookup or zone lookup selected, you can use the toggle to switch between 99th percentile coldest outdoor dry bulb temperature and 99.6th percentile coldest outdoor dry bulb temperature. The default will be the 99th percentile. Click confirm. 

Screenshot From 2026-10-08 10-16-57.png

Note: Your Pro team's design settings take priority over your individual user's design settings. 


Choose default for all new projects you make:make as an individual user:

Navigate to My account > Preferences > Design tab > View and edit user-level default temperatures. Then you can use the toggle as above before clicking confirm. 

Choose

Note: For individual users not in a Pro team, these settings will apply by default forto all new projects youryou Teamcreate, make:unless individual project values are adjusted. 

image.png


Choose setting for one project:

Navigate to Teamyour preferencesproject > DesignPlans tab.task. Click the 3 dots in the top right corner to view more options then select temperature configuration. Then setyou can use the defaultstoggle as above.above Pleasebefore noteclicking yourconfirm. 

team'sNote: designThis settingsoverrides takeTeam priorityand overUser yoursettings, individualletting designyou settings.change temperatures on a per project basis when needed.


​Note:Note: inIn the Performance task, the outdoor low temperature uses the 99.6th percentile, regardless of which ODT is selected.

​Find out more about how the ODT is set.

​Find out more about how to change the ODT.