For shipping to Alaska or Hawaii, please call us at 800-919-2400 to order this product.
The success of the electric Excel Self-Contained Composting Toilet prompted Sun-Mar to design a three-chamber unit for off-grid living or those without a continuous 110-volt supply. The Excel Non-Electric has no fan or heater. Odorless operation is achieved by a 4" vent mounted at the top rear of the unit that acts like a chimney on a wood stove. For good air movement, the vent should be installed vertically and to 2-3 feet above the peak of the roof.
The optional 12-volt fan (available above) should be installed if you need to install the toilet with any bends in the vent. No more than two 45° bends are encouraged, even with the fan. The fan should also be used if the Excel Non-Electric is used residentially or in a location subject to downdraft. The fan draws 1.4 Watts and can be powered by a small solar panel and 12-volt battery.
Evaporating capacity is variable, so the 1" drain at the rear should be connected to an approved drain pit, container, or other facility.
Sun-Mar Composting Toilets save more than 10,000 gallons of water per year, keep water clean for drinking and swimming by not polluting groundwater, and recycle human waste into safe, usable soil. And because their aerobic decomposition produces no sewer gases, they are odor-free! Installation directly into the bathroom is a snap because no water connection is required. Everything for installation and start up, including the vent stack, is included. Great for use in homes, cottages, weekend cabins, pool houses, barns, stables, workshops, or off-grid applications - anywhere you want to minimize your ecological footprint. Real Goods has sold thousands of Sun-Mars with almost universal satisfaction. NSF/ANSI certified. Five year parts-replacement warranty.