Sunday, November 01, 2009 8:30:00 AM

WRc are pleased to announce the launch of their online water calculator which follows the methodology provided in CLG’s ‘The Water Efficiency Calculator for new dwellings’. The calculator can be used for assessing water efficiency in new dwellings in support of The Code for Sustainable Homes and the new Part G of the Building Regulations.

From October 2009 all new dwellings will be required to prove the water using products installed in the home meet the requirement of 125 litres per person per day consumption, as calculated by this methodology.

The online version, produced by WRc, is freely available for everyone including plumbers, architects, designers, Building Control and Approved Inspectors to use to ensure that new dwellings meet this requirement. The calculator has been audited and is endorsed by LABC.

The calculator can be found at

WRc will continue to improve and enhance the calculator over time and therefore welcome any suggestions to be sent to