FEATURES External wall insulation - an example of a retrofit solution. benefits for the developer, whereas smaller stand-alone units tend to use solar or gas installations for hot water heating. Generally, water saving devices are installed at point of use, so the application doesn’t necessarily differ between multi-storey and stand-alone units. What is available on the market are items such as aerators, flow regulators and control valves which can be installed at each point whether a basin tap, shower or bath. More advanced water saving technologies include valves fitted to hot water supply that divert any cold water back into the system to minimise the waste of potable (drinkable) water. Other innovations address toilet flush systems, reducing flushes to as little as four to six litres of water rather than the standard average of 13ℓ; they can also address the correct treatment and use of greywater. SPECIFICATIONS AND SUPPLIER CRITERIA The requirements are gathered from the client, with assistance of a consultant. “It is of the utmost importance that the specification of the system is done by a person with thorough knowledge of the design and of the particular product,” Schröder stresses. Under or over design will cause various problems. “It is therefore important to choose a supplier with a proven track record and experience in the field of, for example, hot water heating and on the related products,” adds Schröder. 22 MARCH - APRIL 2018 AFFORDABLE SA HOUSING Building standards SANS10252 specify the different water usage criteria for different types of buildings and applications. TECHNOLOGY MOVING AT RAPID PACE Technology and innovation are ever changing, in fact changing at such a rate that creating standards and consequently regulation becomes a real challenge. By the time for example, technical committees have been established, technology has already changed and therefore needs constant research and inputs. This was one of the key points addressed at the South African Bureau of Standards (SABS) Standards and Competition Law Indaba held at the end of 2017. Schröder notes, “We strive to stay on the forefront of technological advances, and have partnered with various experts in specific fields, which enables us to stay on top of changes in the markets which will lead to increased efficiency. The cost and client requirements however have an influence on the design and selection of the most efficient system for each particular development.” “Also, putting the customer at the heart of everything we do, means we are constantly revising our approach to energy efficiency and other such critical areas, so that when it comes to other aspects such as fire safety, our non- combustible products have an unbeatable A1 Euroclass (reaction to fire),” Gillott adds.