New BuildSAP Assessments

Find out how Vision Energy can take care of all your compliance needs for your new Build Project

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ConversionSAP Assessments

Vision Energy can take care of your energy assessments for your conversion project, find out more today

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ExtensionSAP Assessments

All Extensions with 25% or more glazing compared to the floor area require SAP & EPC's, find out more

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What are water efficiency calculations?

Building Regulations Part G ensures that each new build dwelling is to achieve no more than 125L per person per day. Water efficiency calculations assess the flow rates of the below to determine the litres per person, per day.

  • Kitchen Taps
  • Other Taps,
  • W/C’s
  • Bath’s
  • Shower’s
  • Rainwater Harvesting
  • Greywater
  • Dishwashers
  • Washing machines
  • H20 softners

Certain regulations/standards will look to achieve an improvement on Building Regulations such as Code for Sustainable Homes, 105 Litres per person per day.

Where can i find the information for my water efficiency calculations?

When it comes to finding the flow rates for your water efficiency calculations, the product data sheet for your fittings should contain the required flow rates for the water efficiency calculations i.e. W/C 4 Ltrs for half flush and 6 Ltrs for full flush.

If you need assistance with your water efficiency calculations, feel free to contact one of our team

Sustainability & Energy Services

Vision Energy are a leading Sustainability & Energy consultancy working nationwide, We specialise in calculations & reports covering Building Regulations, Planning Permission and all other sustainability or energy needs within the construction sector, With a vast amount of knowledge and experience having worked on thousands of projects across the UK, one of our engineers would be more than happy to assist you on your project. SAP Calculations | SBEM Calculations | Energy Statements | BREEAM Assessments | M&E Design | EPC's | Water Efficiency | Air Permeability

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