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WOFATI structures are characterized by a thoughtful design that prioritizes passive systems and natural, locally sourced materials. The "two-skin" system, composed of a double layer of polyethylene membrane, encapsulates the earthen roof, providing a durable and waterproof barrier. The lower layer hugs the structure, while the upper layer defines the thermal mass surrounding it, with at least eight inches of dirt between the layers and sixteen inches on top. WOFATI designs emphasize a harmonious integration with the surrounding woodland, incorporating the "soil on wood" building technique. This method eliminates the need for a conventional concrete foundation, making construction faster and more affordable. A distinctive feature of WOFATI houses is the large gable roof on the downhill side, often incorporating glazing to allow light penetration, while at least 35% of the uphill wall features windows for optimal passive solar gain. This strategic placement and sizing of windows is crucial for maximizing natural light and regulating internal temperature, contributing to the effectiveness of Annualized Thermal Inertia.

Rocket mass heaters are better than natural gas heaters because rocket mass heaters are free to operate and have less than 5% of the carbon footprint.

The lorena cooktop, a specialized component of rocket stoves, is designed for optimal heat transfer and cooking efficiency. It features a metal plate with a strategically placed central hole situated directly above the rocket stove's burn chamber. This central hole allows for the placement of large pots, facilitating rapid heating through direct contact with the intense flames generated by the rocket stove. The metal plate surrounding the central hole serves as an additional cooking surface, providing versatility for a wider range of cooking needs. This dual-purpose design is meant to maximize heat utilization from the rocket stove, contributing to both energy efficiency and reduced cooking times. Discussions about the lorena often involve integrating it into an outdoor kitchen setup, further enhancing its practicality. The lorena embodies the continuous innovation within rocket stove technology, aimed at improving heat transfer and enhancing cooking performance.

WOFATI, an acronym coined by Paul Wheaton, stands for Woodland Oehler Freaky-cheap Annualized Thermal Inertia. It defines a type of earth-sheltered, passive building that blends affordability with energy efficiency. Inspired by the work of Mike Oehler, a pioneer of earth-sheltered building, WOFATI designs use locally sourced, natural materials, such as wood and earth, to minimize both cost and environmental impact. Central to the WOFATI concept is Annualized Thermal Inertia, which utilizes the surrounding earth as a thermal mass to moderate temperatures year-round. This means that the building stays warm in the winter by storing heat from the summer, and cool in the summer by retaining the coolness of the winter, greatly reducing the need for artificial heating and cooling. WOFATI structures typically have a large gable roof on the downhill side, and at least 35% of the uphill wall is made of glass or other light-transmitting material to maximize passive solar gain. WOFATI buildings are ideally situated on or near a woodland, emphasizing a harmonious integration with nature. Allerton Abbey, the first WOFATI, along with Wofati 0.8, are examples of this building style and can be found at Wheaton Labs.