In-Use / BIU International Commercial V6 / Part 2 / 04 - Water /

WAT 13 - Water consumption reporting

Information correct as of 14thJanuary 2025. Please see kb.breeam.com for the latest compliance information.

Apportioning Water Consumption – common areas only assessment - KBCN1679

For assets where only the common areas are being assessed, the water consumption targets and actual figures reported should be based on the water used within the assessed areas only. Therefore, where metering is provided for the whole building consumption and no separate metering of common areas is available, a logical assessment of the sanitary (and other) water use and distribution should be carried out so that the figures are based on an accurate estimation of water usage within the common areas. Apportioning must not be based purely on the percentage of floor area. A logical assessment could be based, for example, on the percentage of water using equipment installed, such as the proportion of toilets/taps/dishwashers etc within the scope of the assessment against those outside of the scope. Justification and calculations should be provided within the evidence to support the reported figures.

Water consumption reporting – Link to Man 04 - KBCN1611

The link to meeting compliance with Man 04, outlined in Wat 13 Criterion 1 is incorrect and should be disregarded. Answer option D in Man 04 includes targets for Energy, Water and Waste. Whereas the intent of Wat 13 relates to targets for Water only. This will be updated in the next reissue of the technical manual.
Information correct as of 14thJanuary 2025. Please see kb.breeam.com for the latest compliance information.