BS 8542:2011 Calculating domestic water consumption in non-domestic buildings. Code of practice
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BS 8542:2011

Calculating domestic water consumption in non-domestic buildings. Code of practice

Status : Current, Under review   Published : October 2011



What is this standard about?

With an increasing demand for water efficiency, a standardized framework will allow interested parties to estimate and report water consumption in a consistent way. This standard supplies such a framework with recommendations on how to calculate the volume of public mains water consumed for domestic use (i.e. WC flushing and other sanitary purposes, water used for drinking, and water used in food/drink preparation and washing up) in non-domestic buildings.

Who is this standard for?

  • Designers
  • Specifiers
  • Building managers
  • Water authorities
  • Product manufacturers

Why should you use this standard?

It gives recommendations for estimating the total water use from the building’s components, allowing consumption to be indicated on a whole building level against that of other buildings, thereby establishing best practice levels.

It provides a framework for and details the development of water use calculation methodologies in non-domestic buildings.

It provides recommendations for the quality of data used to calculate water use for each component in non-domestic buildings and also standardized reporting for product performance data.

This standard applies to both new and existing buildings and covers:

  • Water that is sourced from unwholesome sources such as rainwater harvesting systems or greywater reuse systems
  • Water that is sourced from wholesome sources including both hot and cold water

There is a wide range of building types that constitute non-household buildings including, but not limited to: offices, restaurants, retail buildings, industrial buildings, hotels, leisure buildings and education buildings.

Standard NumberBS 8542:2011
TitleCalculating domestic water consumption in non-domestic buildings. Code of practice
StatusCurrent, Under review
Publication Date31 October 2011
Confirm Date01 June 2016
Normative References(Required to achieve compliance to this standard)BS EN 1287:2017, BS EN 1111:2017, BS 8515:2009, BS EN 13407, BS EN 60456, BS EN 14743, BS EN 14743/AMD 1, BS EN 60436, BS 8525-1, BS EN 997, BS EN 817, BS EN 50242, BS EN 1286, BS EN 200, BS EN 14055
Informative References(Provided for Information)BS 6465-1/AMD 1, BS 6465-1, BS 5906
Draft Superseded By11/30218883 DC
DescriptorsBusiness facilities, Buildings, Potable water, Sanitary facilities, Recreation facilities, Water supply engineering, Industrial facilities, Domestic, Water supply, Educational facilities, Consumption, Mathematical calculations, Water supply and waste systems (building, Water, Sanitary appliances, Energy conservation, Administrative facilities
ISBN978 0 580 71075 9
File Size2.306 MB

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