Water efficiency calculations are a crucial component of Part G Building Regulations in England and Wales. These calculations are essential for ensuring that new dwellings and certain types of building work meet the required water efficiency standards.

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Part G of the Building Regulations sets out specific requirements for water usage in residential properties. The regulations aim to promote sustainable water use and reduce overall consumption. Water calculations, also known as water efficiency calculations, are used to demonstrate compliance with these standards. 

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Key aspects of water calculations for Part G include:

1. Estimating the potential consumption of wholesome water by occupants of the dwelling

2. Calculating the water usage of various fittings and appliances, such as toilets, showers, and washing machines

3. Determining the overall water efficiency of the dwelling

4. Achieve building control sign off

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The target water consumption rate for new dwellings is typically set at 125 litres per person per day, with an optional higher standard of 110 litres per person per day in areas of water stress.

 

By using Home+ Energy, developers and builders can ensure their projects meet the necessary standards and contribute to water conservation efforts. These calculations also help homeowners understand the water efficiency of their properties and can guide decisions on water-saving fixtures and appliances.