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Sun-Mar Composting Toilets

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In 1971 Hardy Sunberg developed the world's first self-contained composting toilet that could be put in a bathroom and would evaporate liquids and compost solids. Over the years he developed a rotating drum with three chambers that would become the foundation for today's toilets. To this day, Sun-Mar remains the world leader in researching and developing composting toilets. From self-contained units, to central units, and even composting toilets that are specially made for RVs and boats, Sun-Mar has over twenty models to choose from, and each is made to fill a specific need. Sun-Mar ensures that each of their toilets take advantage of a using a drum to create compost through aeration and mixing. All Sun-Mar toilets are also certified by the National Sanitation Foundation.