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Green Smart Magazine : GreenSmart 2010
'Using eco panels on the walls was an excellent choice. It has the same, if not more grading as a brick wall,' Eddie says. For power and water efficiency, the house has a photovoltaic system with four panels on the roof. This presents the only visual change to the façade, and delivers a 'carbon positive' outcome. A 2000-litre rainwater tank is connected to the washing machine, toilet and garden tap, while water-efficient fixtures and a native garden reduce the demand for water. Eddie acknowledges the strong synergy existing between the builder and client. 'There were no massive hurdles that could have changed it,' he says. And although the renovation costs were higher, the owners are thrilled despite the fact that a new house may have been cheaper. 'This proves that environmental responsibility in home building is not just the way of the future, it is here now,' Eddie says. gs a light well for further light and ventilation. All other rooms and the position of windows are designed to allow for maximum ventilation. An example is the skylight and attic dormer windows that create a 'chimney effect', letting the hot air escape while drawing cool breezes throughout. 'The renovation is also designed to function without the need for auxiliary heating or cooling systems,' Eddie says. In their place is double glazing to all new windows and doors, a double glazed, operable skylight with a built-in blockout shade, sarking beneath new and existing roofs and draught seals on the front door. The rear section also features a low embodied energy concrete slab, where recycled steel reinforcement is used to reduce the embodied energy of the slab. Another innovation is that all new external walls use the QT EcoSeries wall panel system. A lightweight construction, the panels use recycled polystyrene mixed with aerated concrete and are easy and fast to construct with a thermally efficient rating of R2.5 before added insulation. © Architect: Caitlin McGee GROUND FLOOR ATTIC VITAL TO THE EXECUTION IS THE HIA GREENSMART PRINCIPLE OF RETAINING AND REUSING AS MUCH OF THE HOME AS POSSIBLE The owner -- an architect -- installed an Efergy smart meter to provide real-time feedback on her energy use. It's part of a trial run by the University of Technology, Sydney (UTS), where smart meters measuring water and energy have been installed on the rainwater system. The household also has a smart meter to measure the rainwater system. The savings so far are: • the house uses about 3kW per day (the average home uses about 20kW) • the 1260W photovoltaic system has produced an average of 5.4kW per day since installation. This means that the house is 'carbon positive' • very low usage for the toilet and washing machine due to their high star ratings. Modelling by UTS indicates that a rainwater tank reduces total household mains water demand by about 43 per cent. ideas everyone can use greensmart 2010 23 smarthomes