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WOFATI, an innovative sustainable building technique coined by permaculture advocate Paul Wheaton, stands for Woodland Oehler Freaky-cheap Annualized Thermal Inertia. The design utilizes readily available natural materials like wood and earth to create a "soil on wood" structure that harmonizes with the surrounding woodland. The "freaky-cheap" construction methods pioneered by Mike Oehler and further developed by Wheaton significantly reduce building costs. WOFATI structures are characterized by a double layer of membrane, a "two-skin" system that encapsulates the earthen roof, ensuring dryness and longevity. The principle of Annualized Thermal Inertia is key, using the earth's mass to regulate temperature, providing passive heating in winter and cooling in summer. WOFATI houses feature large windows on the uphill side for optimal passive solar gain, while the downhill side typically boasts a large gable roof, also incorporating glazing for natural light penetration. Allerton Abbey, located at Wheaton Labs, serves as a prime example of a WOFATI house

"Woodland" management, as described by Ben Law in his books The Woodland Way and The Woodland Year, promotes active human participation in shaping and nurturing the ecosystem. This approach prioritizes the long-term health and resilience of the woodland, recognizing its value not only for timber production but also for food, medicine, wildlife habitat, and overall ecological well-being. The choice of "woodland" over "forest" in describing Wofati design reflects a deliberate shift away from extractive forestry practices towards a more harmonious and sustainable relationship with the natural world. This distinction highlights the importance of language in shaping our understanding and approach to land management, emphasizing the need for conscious and mindful stewardship of the Earth's resources.

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.

A dry outhouse, a simple and sustainable alternative to conventional flush toilets and septic systems, is frequently discussed within permaculture circles as a means of minimizing environmental impact and maximizing resource utilization. This type of outhouse is characterized by a pit dug into the ground, strategically located on a higher elevation point to encourage water runoff and maintain dryness. Key design elements for a successful dry outhouse include a "no pee" policy, the use of ample sawdust for odor control and composting, and urine diversion mechanisms, particularly important for accommodating female anatomy. While concerns about groundwater contamination exist, proper placement, construction, and the incorporation of heavy-feeding trees or plants like willows in a "tree bog" system can mitigate these risks. Furthermore, the integration of a urine separator can significantly reduce the volume and toxicity of waste, facilitating easier composting and nutrient recycling. The dry outhouse, particularly when combined with urine diversion and careful management, offers a cost-effective and environmentally sound approach to sanitation, aligning with permaculture principles of resource conservation and closed-loop systems.

Beyond the foundational elements of WOFATI design, there are advanced concepts that further enhance its effectiveness and versatility. The strategic placement and sizing of windows on the uphill side, for instance, are crucial for optimizing passive solar gain and regulating temperature. The design of the "two-skin" system, incorporating a double layer of membrane, demands careful consideration of materials and installation techniques to ensure long-term dryness and durability. The integration of WOFATI principles with other sustainable technologies, such as rocket mass heaters, offers the potential for a highly efficient and self-sufficient dwelling. The concept of WOFATI extends beyond just houses; variations such as WOFATI coolers and freezers, utilizing specialized venting systems and expanded thermal mass, showcase the adaptability of this approach to address various needs. Furthermore, WOFATI principles can be applied to animal shelters, with specific modifications to accommodate larger spaces and functionality. The ongoing development and experimentation at Wheaton Labs, as seen in projects like Allerton Abbey and Wofati 0.8, continue to push the boundaries of WOFATI design and its potential for sustainable living.