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  • Sun-Mar Excel Composting Toilet
    Sun-Mar Excel Composting Toilet
  • Sun-Mar Three Chamber System
    Sun-Mar Three Chamber System


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Availability: In stock.


SKU: 088-01007-W

Quick Overview

Same as "EXCEL" but with no electric features.
Residential/Continuous - 3 Adults or Family of 5
Weekend and Vacation Use - 6 Adults or Family of 8
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The success of the Excel design meant that a three chamber unit could be specifically designed for those with NO continuous 110 volt supply. First launched in 1981, the Excel NE has long been the standard toilet for those living off the grid. A 1998 redesign gave the unit a rounded look, and recessed the drum handle.

The Excel NE has no fan or heater. Odorless operation is achieved by a 4" vent mounted at the top rear of the unit which 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 DC fan should be installed if you need to install the toilet with any bends in the vent. No more than 2 45° bends are encouraged, even with the fan.

If the Excel NE is used residentially or heavily, or is in a place which is subject to downdraft, the optional 12 volt fan should be installed in the vent stack. This fan draws 1.4 watts and can be powered by a solar panel and 12 volt marine battery (see Related Products at left.)

Evaporating capacity on the Excel NE is variable, so the 1" drain at the rear should be connected to an approved drain pit, container, or other facility (instructions available from us.)

Product weight is 47 pounds. Shipping weight is 81 pounds. Approximate shipping charge calculated based on shipping weight (crated), as shown in the "Additional Information" tab. Shipped FOB Tonawanda, NY from Sun-Mar warehouse.

Please contact us if you have any questions, or if there is no shipping weight noted for a shipping cost quote. Prices online subject to change without notice due to supplier price increases. We will contact you if current price is more than the online price prior to processing the order.