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WOFATI, an acronym for Woodland Oehler Freaky-cheap Annualized Thermal Inertia, is an innovative approach to sustainable building developed by permaculture expert Paul Wheaton. WOFATI structures are designed to be eco-friendly, utilizing locally sourced natural materials, primarily wood and earth. These structures are intended to be located on or near woodlands, promoting a harmonious integration with the natural surroundings. Annualized Thermal Inertia, a key element of WOFATI design, harnesses the thermal mass of the surrounding earth to provide passive heating in winter and cooling in summer, thereby minimizing the need for artificial temperature regulation. WOFATI structures are inspired by the work of Mike Oehler, a pioneer in earth-sheltered building known for his simple, "freaky-cheap" designs, which Wheaton has adapted and refined to further reduce construction costs. WOFATI buildings are typically characterized by a large gable roof on the downhill side, with at least 35% of the uphill wall featuring glass or other light-transmitting materials to maximize passive solar gain. Allerton Abbey, the first WOFATI structure, and Wofati 0.8 are both located at Wheaton Labs in Montana and serve as prominent examples of this unique building style.

Hugelkultur, is an advanced permaculture technique for creating self-sufficient, raised garden beds by burying wood beneath the soil. Hugelkultur beds can be built in various shapes and sizes, from small backyard gardens to large farm-scale operations. This technique utilizes a variety of wood, from small twigs to whole trees, which decompose over time to create a beneficial environment for plant growth. The wood acts as a sponge, holding water and reducing or eliminating the need for irrigation. As the wood decomposes, it attracts beneficial microorganisms and releases nutrients, creating a fertile "soil on wood" environment that requires minimal fertilization. Hugelkultur is an environmentally sustainable technique that utilizes organic materials that would otherwise be discarded, embodying the permaculture principles of working with nature and reducing waste.. This technique is also applicable to diverse climates and has been proven effective even in desert environments

WOFATI structures excel in effectiveness due to their emphasis on passive design principles, particularly Annualized Thermal Inertia, which utilizes the earth's thermal mass to regulate temperature fluctuations. By strategically incorporating design elements like large windows on the uphill side and a substantial gable roof on the downhill side, WOFATIs maximize passive solar gain, further reducing the need for artificial heating and cooling. This results in significant energy savings and reduced reliance on external energy sources. The use of locally sourced, natural materials, primarily wood and earth, in WOFATI construction minimizes the environmental impact associated with manufacturing and transportation of building materials. The "two-skin" system, a double layer of membrane encapsulating the earthen roof, ensures dryness and longevity, enhancing the building's overall effectiveness and sustainability. As seen in Allerton Abbey, the first WOFATI built at Wheaton Labs, these structures successfully demonstrate the practicality and efficiency of this building technique

Hugelkultur offers advanced techniques and benefits for sustainable gardening and food production. This permaculture method utilizes buried wood to create raised garden beds, fostering a thriving ecosystem that reduces reliance on external inputs. As the wood decomposes, it transforms into "a sponge to hold water," decreasing irrigation needs and attracting beneficial microorganisms that enhance soil fertility. The shrinking wood creates air pockets, naturally aerating the soil and promoting a "self-tilling" effect. This "soil on wood" technique enhances soil health by creating "parking spaces for water and nutrients", ultimately minimizing the need for fertilizers. Hugelkultur beds can be constructed on varying scales, from small gardens to large farms, and are particularly well-suited for locations with limited rainfall, such as deserts. This versatile approach allows gardeners to cultivate diverse "garden plants" while minimizing environmental impact.