Plumbing and water heaters
Compost pile hot tub water heater
...solar energy. These are homesteads, farms and schools fit for a challenging future of peak oil, climate change and economic transition."
By running water through a giant compost pile, it was brought from 7 °C to a blistering 62 °C. Not much more needs to be said that the video doesn't say. We love seeing stuff like t...