This composting toilet meets the standards of the National Sanitation Foundation Standard 41 testing. Additional Features * Fitted with a high quality turbo fan * Also has vent stack for added odor control * Evaporation is limited due to smaller size * Safety drains are included to prevent messes * Depth required to remove drawer: 38 inches * Vent outlet center distance from right side: 7 inches * Requires drilling into your wall or ceiling for venting * Uses standard toilet paper * Includes a 3-5 year limited warranty Designed for those with very limited space, the Sun-Mar SpaceSaver Electric Waterless Composting Toilet measures only 19.5W x 23D x 30H inches and will fit into a small closet. Rated for use by one adult or families of two, this toilet is fitted with a high quality turbo fan and has a vent stack for added odor control. Evaporation is limited due to its smaller size, so safety drains are included to prevent messes. This toilet requires drilling into your wall or ceiling for venting and comes with a three to five year limited warranty. Sun-Mar 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. * 3 chamber unit fits into extremely small places * Plugs into a standard 110V outlet * Rated for 1 adult or families of 2 * Rated for 3 adults for weekend use * Self contained composting toilet * Measures 19.5W x 23D x 30H inches