A fine example of biomimicry, the PaxFan is an innovative, spiral fan created by Jay Harman, an Australian inventor. His domestic exhaust fan is half as noisy and three-quarters more efficient than the average fan. Sierra Magazine reports: Harman spent a lot of his life watching water flow, both as a diver and as a […]
Solar water heating works efficiently even in cloudy areas. Home Power Magazine recently ran an article that gives a simple overview of solar water heating systems (well, relatively simple). In the article, they examine various popular systems that have proven themselves reliable.