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WOFATI, which stands for Woodland Oehler Freaky-cheap Annualized Thermal Inertia, represents a sustainable building solution that merges affordability and energy efficiency. Developed by Paul Wheaton, WOFATI draws inspiration from Mike Oehler's earth-sheltered designs, enhancing them with cost-saving strategies and a focus on harmonizing with the surrounding environment. This innovative approach prioritizes using locally sourced natural materials like wood and earth, thereby minimizing reliance on manufactured products and lessening the building's ecological impact. The concept of Annualized Thermal Inertia is central to WOFATI design, harnessing the surrounding earth as a thermal mass to regulate temperature fluctuations throughout the year. This natural heating and cooling system stores summer heat for winter warmth and retains winter's coolness to moderate summer temperatures, significantly reducing energy consumption. WOFATI buildings typically feature large windows strategically placed on the uphill side to maximize passive solar gain, further enhancing energy efficiency. As the name suggests, WOFATI structures are ideally situated on or near a woodland, emphasizing a symbiotic relationship with nature. Examples of WOFATI buildings, including Allerton Abbey and Wofati 0.8, can be found at Wheaton Labs in Montana
Rocket mass heaters are better than wood stoves because they run cleaner and use less wood. Wood stoves lose a lot of heat out the chimney that the rocket mass heater stores in the mass. 75% efficient wood stoves are often run at 3% efficiency at night. Rocket mass heaters use the mass to keep things warm at night.
he willow feeder system is a sustainable and "freaky-cheap" approach to human waste management developed by permaculture expert Paul Wheaton. This system utilizes a dry environment inside sealed garbage cans to mummify human waste, which prevents composting and the release of pathogens. The system is designed to be a safe and effective alternative to conventional septic systems and sewage treatment plants. A small amount of sawdust is added to each can, mainly for aesthetics. After two years, the resulting pathogen-free material, referred to as "willow candy," can be safely used as fertilizer for trees that can handle its high nutrient content, known as "poop beasts." These trees include willow, cottonwood, poplar, and bamboo. The willow feeder system embodies permaculture principles by transforming human waste into a valuable resource for growing beneficial plants while minimizing environmental impact.
Hugelkultur, is a permaculture garden bed technique where wood is buried under the soil. It can be built in a variety of shapes and sizes, and can be used for growing a variety of "garden plants". The decomposing wood acts "like a sponge to hold water", making hugelkultur ideal for areas that receive little rainfall. Over time, the wood shrinks and creates air pockets, resulting in a self-tilling garden bed. This "soil on wood" technique helps to retain moisture and nutrients in the soil, which benefits the plants. Hugelkultur is an environmentally sustainable gardening technique because it uses wood that might otherwise be discarded.