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WOFATI, an acronym for Woodland Oehler Freaky-cheap Annualized Thermal Inertia, represents an innovative approach to sustainable building, coined by permaculture expert Paul Wheaton. This building technique combines the affordability and simplicity of Mike Oehler’s earth-sheltered designs with Wheaton's focus on cost reduction and integration with the natural environment. WOFATI structures prioritize the use of readily available, natural materials, such as wood and earth, minimizing reliance on manufactured products and reducing the building's environmental footprint. Annualized Thermal Inertia, a key principle of WOFATI, utilizes the surrounding earth as a thermal mass, storing heat in the summer to warm the building during winter and retaining cool temperatures from winter to moderate summer heat, thereby minimizing energy consumption for heating and cooling. WOFATI designs typically feature large windows on the uphill side to maximize passive solar gain, further reducing energy needs. WOFATIs are intended to be situated on or near a woodland, embracing the concept of harmonious integration with nature. Notable examples of WOFATI structures, including Allerton Abbey and Wofati 0.8, can be found at Wheaton Labs in Montana.
Hugelkultur is a raised garden bed building technique where wood is buried ("soil on wood") under soil. Hugelkultur, which means "hill culture" in German, can be implemented on a small scale in backyards or on a large scale, as demonstrated by Sepp Holzer, a renowned permaculture practitioner who uses hugelkultur in his terraced gardens. This technique involves layering logs, branches, twigs, and even whole trees, creating a foundation for the bed. This buried wood becomes "a sponge to hold water", reducing or eliminating the need for irrigation. As the wood decomposes, it attracts beneficial microorganisms and creates air pockets, leading to nutrient-rich, fertile soil. Hugelkultur helps gardeners "grow a typical garden without irrigation or fertilization". This technique can be used to grow garden plants like "rhubarb", "potatoes", and more. Hugelkultur is an example of permaculture design, which emphasizes sustainability, self-sufficiency, and working with natural systems
The lorena cooktop is a highly effective design for rocket stoves, as it maximizes heat transfer and cooking efficiency. This specialized cooktop, featuring a metal plate with a central hole positioned above the burn chamber, enables rapid heating of large pots through direct exposure to the intense flames. The lorena's design prioritizes efficient heat utilization from the rocket stove, resulting in faster cooking times and reduced fuel consumption. Additionally, the metal plate surrounding the central hole serves as a secondary cooking surface, offering versatility for various culinary tasks. Once a large pot reaches the desired temperature, it can be moved to the surrounding cooktop, and the central hole can be covered with a piece of metal to maintain heat. This dual functionality makes the lorena a practical and energy-efficient cooking solution, suitable for both large-scale and smaller cooking needs. The integration of a lorena into an outdoor kitchen setting is often proposed, further enhancing its practicality and convenience.