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

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

Choose for one project:

Navigate to your project > Plans task. Click the 3 dots in the top right corner to view more options then select 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. 

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Choose default for all new projects you make:

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 default for all new projects your Team make:

Navigate to Team preferences > Design tab. Then set the defaults as above. 

​Note: in 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.

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