Sun-Mar Excel

Long considered the standard in composting toilet performance, the EXCEL is the preferred self-contained electric model for heavy or residential use. Composting speed and capacity on this unit is outstanding! The large Bio-drum™ engineered into the Excel gives it twice the capacity of the Compact. The Excel was first introduced in 1977, and has been continuously improved ever since. The current model is the fourth generation Excel.

The Excel has been successfully tested by the National Sanitation Foundation for six continuous months at its maximum residential capacity of four adults. Key criteria were that the unit operated without odor, and produced a clean dry compost. For weekend and vacation use the capacity is 6-8 people, and even these numbers can be doubled for short periods. The 2" vent is attached at the top rear of the unit and can be installed invisibly by running it through the wall and up the outside wall. For comfort the Excel has a detachable footrest which can be removed to pull out the finishing drawer. This step is very sturdy and has been stress-tested to hold 300 lbs. Although the Excel can normally evaporate all liquids, a ½" emergency drain is fitted at the rear and this should be connected if the unit is to be used residentially or heavily, or if prolonged power outages are expected.

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