The Anticipated New Approved Document G and the Water Efficiency Calculator

Oct 7, 2011 |NBS

This programme investigates the anticipated new Approved Document G on Sanitation, hot water efficiency and water efficiency, as well as the Water Efficiency Calculator, both of which are devised to monitor the amount of water used in a typical dwelling house.

The Building Regulations (England and Wales) Approved Document G, scheduled for publication in 2010, is compared to the previous 1992 edition, while regulation 17K and its performance target of 125 litres per person per day is explained in the context of Code for Sustainable Homes levels. The document's stipulations on water quality are discussed, including definitions of 'wholesome' and 'non-wholesome' water, and there is a detailed look at hot water safety. The Water Efficiency Calculator is explored as a tool for assessing the notional water efficiency of new dwellings. The mathematical workings of the Water Calculator are explained and an example calculation worked through.

Our latest articles

Designing sustainability into construction – proof over promises in sustainable construction

With tightening regulations and growing client demand, the construction industry is under increasing pressure to demonstrate measurable progress against carbon reduction targets. For specifiers, that means ensuring every product installed stands up to scrutiny, not just in material, but in source, traceability, and lifetime carbon footprint. JELD-WEN, a specialist timber door, door kit and doorset manufacturer, explains the critical considerations when selecting sustainable materials.

Sponsored

Dulux Trade launches new solution for high-humidity spaces

Because of how they are used, kitchens and bathrooms experience more moisture, more contact, and more ongoing maintenance. Standard emulsions are not designed for this level of use. Over time, finishes can lose their appearance or fail to cope with the environment. Kitchens and bathrooms benefit best using a product formulated specifically for their daily demands.

Construction ProductsSponsored

The hidden cost of compliance: why architects are demanding a new era of product transparency

Few pieces of legislation have reshaped the UK construction industry as significantly as the Building Safety Act 2022 (BSA). Introduced to improve accountability, traceability and safety standards across the built environment, the legislation has fundamentally changed the responsibilities placed on architects, contractors and manufacturers. While the principles behind the Act are widely supported, the reality for architectural practices is proving more challenging than many anticipated.