Last edited 20 Feb 2021

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BRE Group Researcher Website

Predicted percentage dissatisfied

Predicted percentage dissatisfied (PPD) is: ‘…an index that establishes a quantitative prediction of the percentage of thermally dissatisfied people who feel too cool or too warm. For the purposes of ISO 7730, thermally dissatisfied people are those who will feel hot, warm, cool or cold.’

Ref BREEAM UK New Construction, Non-domestic Buildings (United Kingdom), Technical Manual, SD5078: BREEAM UK New Construction 2018 3.0, published by BRE Global Limited.

--BRE Group

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