SA Affordable Housing November / December 2017 // Issue: 67 - Page 21

FEATURES Standards have been set on how to install comfortable lighting for communities and homes. Part O of the ‘new’ SANS were published in January 2011 after substantial updates by the South African Bureau of Standards (SABS) in collaboration with Agrément South Africa, the South African Institution of Civil Engineering (SAICE), as well as the South African Refrigeration and Air Conditioning Contractors Association (SARACCA). Requirements specified in the SANS include: • general requirements • requirements relating specifically to lighting • requirements relating specifically to ventilation • requirements for designated smoking areas and smoking rooms Electrical Standard SANS 475 and SANS 62031 only mention conforming to safety specifications. However, organisations like the Green Building Council of South Africa (GBCSA) and Solid Green encourage contractors and electrical consultants to opt for LED solutions from a sustainability perspective. LIGHTING AND VENTILATION REQUIREMENTS Changes to Part O of the NBR (when the legislation was updated a few years ago) include a welcome move from WC (short for water closet – and a Victorian term) to ‘toilet’. There are also quite substantial changes to this section of the regulations. While the lighting and ventilation regulations are generally ‘deemed to satisfy’ if they quite simply meet the requirements of SANS 10400-O, the NBR states that if there is not sufficient natural light from windows in habitable rooms, as well as corridors, lobbies and on staircases, artificial lighting should be provided. Reasons for inadequate lighting may be due to: • the size or shape of the room or space; or • the use of thick, patterned or opaque glass for windows, which prevents natural light from illuminating the room. Similarly, if there is insufficient ventilation, artificial ventilation must be installed. The SANS10400 website notes rooms that may be dangerous for health and safety or occupants or a room where natural ventilation is inadequate may require artificial ventilation. LIGHTING AFFORDABLY Ops360 suggests implementing LED lighting and basic Clipsal 2000, or Redisson plugs and switches that are the most affordable and locally produced fixtures on the market. For affordable homes, 5W LED bulbs or panels are most affordable and priced very similarly to current compact fluorescent lamp (CFL) ‘energy saver’ bulbs while saving more than 50% of electricity consumption and lasting more than twice as long. Ogle says that electrical consultants and electrical installers are comfortable installing CFL energy savers as many do not understand the benefits of LED, which include costs, quality and lighting that LED has over conventional CFL bulbs. “LED lighting conventionally is 5W for most applications as opposed to CFL which use 11W or 14W while providing the same output lumens (around 450 lux),” says Ogle. This means LED has the benefit of a similar investment amount to energy savers, longer lifespan and a ‘brighter’ effect in the home for cool white lighting. And this isn’t the only misconception that he has seen in the industry. AFFORDABLE SA HOUSING NOVEMBER - DECEMBER 2017 19