BCA 2010 - ABCB - Australian Building Codes Board

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Client Feature PRODUCT Innovation BCA & INDUSTRY NEWS Leading Products for the Built Environment Philips Innovation: the MASTER TL5 Eco Philips most recent energy saving innovation is the MASTER TL5 Eco. This unique range reduces energy consumption by 10% without reducing lighting quality. These savings are made possible by the unique mix of filling gases and new phosphor technology which improves lighting output while reducing energy consumption. The MASTER TL5 Eco 25W lamps are a direct replacement for a regular TL5 28W and in the application provides the same light output - 2900 lumens. The benefit of a true retrofit solution is the ease of use. MASTER TL5 Eco lamps are designed to work in all the applications that currently use the conventional TL5 lamps and therefore make them perfect for relamping existing TL5 luminaires as well as new buildings and renovations. But energy saving isn’t the only benefit of MASTER TL5 Eco. All of the existing specifications that have made Philips TL5 a popular choice have been included in this new technology : low mercury, (1.4mg), long lifetime, high CRI and ability to be dimmed, mean that this unique range can be included in almost all applications where TL5 is specified. Philips now offers a range of TL5 Eco lamps that will offer energy saving options for most current TL5 applications. We see this as a major step towards making energy saving easy to experience for all customers, while not compromising on lighting quality. For information contact Philips on 1300 304 404 or www.philips.com.au/lighting The future is renewable energy – have you secured a strong long-term partnership? If you have decided to investigate the installation or sourcing of renewable energy technology, it’s a good idea to do your homework and make sure your partner will be there for you when you need them with the quality guarantees to match. As a business building the homes and facilities of the future, a strong reliable partner with the product range to match will save you precious time and money in bringing your projects to completion. Conergy Australia supplies and manufactures a range of Australian designed solar hot water systems, as well as solar power and small wind power solutions for any application. We are the manufacturer of the world’s most popular SunTop III solar mounting system, which is AS1170 certified for use in all wind areas of Australia. Conergy PowerPlus solar panels are manufactured at our vertically integrated German manufacturing facility – the world’s most modern solar production plant. Conergy’s Australian network of state sales office and warehouse facilities in Sydney, Melbourne, Brisbane, Perth and Darwin means we are ideally positioned to support and deliver, wherever and whenever you need it. Whether for small scale, remote area power generation or some of the world’s largest multi-megawatt solar power farms – Conergy has a track record of successful implementation with high quality products and performance guarantees. With quality products in all key areas of renewables, the world’s most modern solar panel production plant, reliable manufacturing suppliers and consistent investment in its international sales networks, Conergy occupies a key position in the solar value creation chain. If you are seeking a strong global partner in renewable energy, contact your nearest Conergy state office on 1300 724 531 or visit www.conergy.com.au for more information. 38 • Australian Building Regulation Bulletin
Client Feature BRANZ: Installed performance of ceiling insulation BRANZ recently compared the in situ performance of ceiling insulation installed in the more traditional layout of friction-fitting between ceiling framing, with the same insulation installed over the top of framing (without any insulation between the framing). Led by Ian Cox-Smith, BRANZ Building Physicist, the recent BRANZ research project looked at what gives the best performance. Figure 1: Polyester insulation fitted against framing in the way the R-value has traditionally been calculated. Figure 2: Thermal resistance improves when insulation is cut to the width of the space between framing plus twice the width of the frame (2 × 45 mm). BRANZ Building Physicist Ian Cox-Smith Different options assessed The project used heat flux transducers to take in situ measurements of thermal resistance. This was measured for the three ceilings in the study after the same insulation material had been installed in each of several different ways: • The testing of ceilings and existing insulation before a sufficient area (approximately 4 m2) of the insulation was removed. • Insulation installed both between and over the framing. (Figure 1) • Insulation cut and friction-fitted between the framing. (Figure 2) • Insulation installed over the framing. (Figure 3) Further laboratory-based measurements were made using the BRANZ heat flow meter, in conjunction with thermal modelling, to confirm the thermal effect of insulation friction-fitted around framing. Better fit, better performance between framing Where insulation was cut to a suitable width and fitted between the framing, it was possible to achieve a visibly continuous insulation layer with no framing showing. When this happened, the thermal performance measured was significantly better than is normally calculated for the common situation with visible framing. It was close to what is expected with the same insulation over the top of the framing, with no convective losses assumed. Thermal modelling has demonstated that it would be possible to adjust Thermal Resistance calculations to account for the better thermal performance achieved when insulation is fitted to cover the framing. In contrast, it would be difficult to model the situation of convective bridging through insulation fitted over the top of framing. Between framing has many pluses Fitting insulation for good performance is easier between framing than over the top of framing. Convective losses from gaps are more likely in the latter case. It is relatively easy to see that insulation fitted between framing is insulating the framing – the framing will not be visible when this has been done correctly. Visually assessing that insulation installed over framing has been fitted well enough to minimise convective bridging is much more difficult. BCA PRODUCT + iNDUSTRY INNOVATION NEWS Table 1: Summary of results from the three ceilings. Figure 3: Installing insulation between and over the top of framing gives the best R-values. Thermal resistance (m²K/W) Estimated measurement (uncertainty 10%) Ceiling A Ceiling B Ceiling C Original insulation R1.5 R1.7 R2.2 Single layer of insulation over the top of framing Calculated from modelling R3.6 Single layer of insulation frictionfitted between framing Calculated from modelling R3.6 Layer of insulation between framing and second layer framing R1.5 (initial) R3.5 (refitted to close gaps) R1.5 R3.5 R3.7 >R5 R4.8 Calculated from modelling R6.5 R5.2 Australian Building Regulation Bulletin • 39
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