The Sun-Mar Compact is an elegant, low profile, medium capacity, electric composting toilet. All Sun-Mar composting toilets incorporate a patented Bio-drum which ensures fast and odorless decomposition. The Compact is especially popular for use in cabanas, guest houses, light cottage use or any remote place where there is an electrical connection but no plumbing. Saves thousands of gallons of water, while recycling waste into soil. The unit is shipped fully assembled. To install, simply plug into a regular 110-Volt outlet and connect the supplied 2 in. vent stack. Seasonal capacity: 3 adults or families of 4. Residential use: 1 adult.