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• The Water Efficiency Calculator for new dwellings

Planning, building and the environment

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Summary

This document sets out the Water Calculation Methodology for assessing the whole house water efficiency of new dwellings.

The latest document is the September 2009 version and replaces the previous May 2009 version.  

The calculation method is to be used to assess compliance against the water performance targets in Building Regulations 17.K and the Code for Sustainable Homes now uses this calculator as the Assessment Methodology for WAT1.

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• This publication is only available online - see below to download.

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• The Water Efficiency Calculator for new dwellings (external link)
  PDF, 1600 kb, 23 pages

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If you require this publication in an alternative format (eg Braille or audio) please email alternativeformats@communities.gsi.gov.uk quoting the title and product code/ISBN of the publication, and your address and telephone number.

Related publications

• Code for Sustainable Homes: Technical guide - May 2009 Version 2

  • Published: 29 May 2009
  • Site: Planning, building and the environment

• Analysis of Consultation Responses for Water Efficiency in New Buildings

  • Published: 29 June 2007
  • Site: Corporate

• Mandating Water Efficiency in New Buildings - A Consultation

  • Published: 13 December 2006
  • Closing date: 8 March 2007
  • Site: Planning, building and the environment