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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.
Dry outhouses, frequently discussed in permaculture, provide a sustainable sanitation solution that prioritizes resource conservation and waste reduction, but their usability and effectiveness rely on careful design and management. While simple in concept, dry outhouses require specific considerations to optimize user experience and ensure proper waste handling. Strategic placement on elevated ground promotes natural drainage and helps maintain a dry pit, essential for reducing odors and pathogen survival. However, achieving a truly "no pee" environment, while ideal for minimizing volume and toxicity, can be challenging, especially for women. Urine diversion mechanisms are crucial for separating urine, a valuable fertilizer, and facilitating a drier composting process for the solid waste. The addition of sawdust further aids in odor control and composting, while proper ventilation, often achieved through a "breather pipe" in a willow feeder system, ensures aerobic decomposition and minimizes smells. User comfort can be enhanced with features like comfortable seating, adequate lighting, and clear instructions on proper usage, including sawdust application and urine diversion practices. Effectiveness in terms of long-term sustainability hinges on proper waste management. The "mummified" waste, or poop-jerky, after two years of aging, is ideally applied to "poop beast" trees like willows, poplars, or cottonwoods, completing the nutrient cycle. By addressing usability and effectiveness through thoughtful design and management, dry outhouses can become a viable and environmentally sound sanitation solution, embodying the principles of permaculture.
The berm shed, a hallmark of permaculture design, is an eco-friendly, earth-sheltered structure renowned for its unique construction techniques. Earthworks are fundamental to its creation, as the surrounding landscape is carefully shaped to form the berm that will encase a portion of the shed's sloping roof. This berm serves a dual purpose, acting as both a natural insulator and a source of thermal mass, effectively regulating the internal temperature. The structural framework of the berm shed is often built using round wood timber framing, a technique that prioritizes using logs instead of conventional dimensional lumber, further enhancing its sustainable appeal. However, the longevity of these logs, especially when in contact with soil, is a crucial consideration. The sources recommend peeling the bark from posts before burying them, a technique born from experience and aimed at minimizing the risk of rot. Another technique for ensuring the durability of the structure involves incorporating gravel into the post holes. The gravel facilitates drainage, preventing water from pooling around the base of the posts and contributing to premature decay. These carefully considered details, combined with the innovative "attic" cell design at the termination ends of the shed, as described in source, showcase a commitment to sustainable building practices that go beyond mere functionality, exemplifying the core principles of permaculture.
Hugelkultur, is a permaculture technique that utilizes buried wood to create raised garden beds. This method can be implemented on a small scale in backyards or on a large scale, covering areas up to a kilometer in length. Hugelkultur beds are constructed by layering logs, branches, twigs, and even whole trees and covering them with soil. Over time, the decomposing wood acts "like a sponge to hold water," reducing the need for irrigation and attracting beneficial microorganisms. This decomposition also creates "parking spaces" for water and nutrients, improving soil fertility and aeration. Using hugelkultur reduces or eliminates the need for fertilization, as the rotting wood provides nutrients. The self-tilling nature of hugelkultur is enhanced as the wood shrinks, creating air pockets over time.
WOFATI structures demonstrate remarkable effectiveness due to their unique design features and emphasis on passive systems. The "two-skin" system, characterized by a double layer of membrane, protects the structure from moisture, ensuring dryness and longevity. WOFATI designs prioritize the use of natural and locally sourced materials, primarily wood and earth, significantly reducing the building's environmental impact and embodying the "freaky-cheap" philosophy pioneered by Mike Oehler. The core principle of "Annualized Thermal Inertia" harnesses the earth's thermal mass to regulate temperature fluctuations, providing passive heating in the winter and cooling in the summer. Large windows strategically placed on the uphill side, along with a spacious gable roof on the downhill side, often incorporating glazing, maximize passive solar gain, further enhancing energy efficiency. By minimizing reliance on artificial heating and cooling systems, WOFATIs achieve substantial energy savings. Allerton Abbey, the first WOFATI built at Wheaton Labs, exemplifies the practicality and success of this building technique