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Making Your Home Sustainable - A Guide to Retrofitting Spear & Jackson offering precision and control inSustainable ideas, using natural energies, to improve existing houses in a cool temperate climate In 1991, architect and solar consultant Derek Wrigley moved into a townhouse in Canberra and faced a new design challenge how to retrofit an existing suburban house to use renewable energies rather than fossil fuels. Convinced that building design could do more to achieve sustainability, he developed a series of innovative devices to improve the energy
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