Water efficiencyNew homes must not exceed a new water efficency standard of 125 litres per person per day using the new ' water efficiency calculator'. In the UK we use about 55% more water than we did 25 years ago*, and this is forecast to rise. It is all pure drinking water, yet 63% of it drains away in the bathroom. If, with every shower, bath or WC flush we save a little water, this mounts up to very large volumes conserved. The new building regulations require water saving to be planned into new homes. In this guide we explain how the water efficiency calculator works and which products to choose for the best ratings. Hot water safetyBaths in new homes are required to have thermostatic control of water temperatures. Water should not exceed 48° C. To prevent the risk of scalding all baths in new homes will be required to fit a device that limits the hot water temperature to a maximum 48° C. Hot water needs to be stored at 60° C or above in order to prevent growth of harmful bacteria - but at this temperature healthy adult skin can be scalded and the young and elderly are even more vulnerable. This guide will explain the options for meeting the new mandatory regulations. part G at a glance From 1 October 2009 new dwellings and new dwellings created by a change of use of an existing building must comply with new building regulation. This guide is provided to help you quickly understand the new regulations and how Ideal Standard products can help you comply. Two key areas affect sanitaryware and fittings: * Environment Agency website
02 03 Ideal Standard guide: 4 The Water Efficiency Calculator An introduction to the new Water Efficiency Calculator which provides the way to calculate the theoretical water usage per person per day in a domestic building. The calculator requires the input of water usage data on bathroom and kitchen appliances for a new building or building that has change of use. 6 Low flush WCs Over the years WC flush volumes have reduced from as much as 20 litres in the mid 20th century down to 6 litres or less today. This section explains the options available and the factors that need to be considered in selecting the most effective flush in a building. 9 Low volume baths The bath typically uses a considerable amount of water in the bathroom. Today changing habits mean that showering has reduced bath usage. This section shows the options of baths and shower/ baths available and the water they consume. 10 Flow regulators for taps, mixers and showers For the most efficient use of water it is important to have the right balance between effective flow rate and pressure versus over- consumption of water. This section explains the considerations needed in selecting the optimum fittings. 14 Thermostatic hot water control There are different ways to comply with the new requirement to have thermostatic temperature control on baths. Here we show the different solutions that can meet this need. This guide is provided to help you quickly understand Part G and the considerations you need to make when planning a building. It is not intended to be used in isolation and we would recommend you always consult the water regulations or planning officer before specifying any project. The full Part G document can be downloaded at www. planning portal. gov. uk. The Water Efficiency Calculator document can be downloaded at www. communities. gov. uk.