Excel Non-Electric Composting Toilet

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 as close to vertical as possible.

If the Excel NE is used residentially or heavily, or is in a place which is subject to downdraft, an optional 12 volt fan should be installed in the vent stack. This fan draws 1.9 watts and can be powered by a solar panel and 12 volt battery.

The fan should also be installed if there is to be any bends in the vent stack, as the "chimney effect" is negated by a bend.

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.


5 adults or families of 7 weekend/vacation use,

2 adults or families of 3 residential/continuous use



Width: 22 " Width with Handle: 26" Height: 31 "
Height Footrest to Seat: 17" Footrest Height: 11" Length: 33"

Rough-In Dimensions

Click on Image for Larger, Printable Diagram

Length with Footrest: 42" Required Length to pull out drawer: 51"














Other Specifications

Vents: 4" Vent Pipe and Fittings (Supplied with unit) Drains: 1" Drain (10 ft. Hose supplied) Options: 12 Volt Electric Fan, 1.9 Watts, comes installed in 11" length of 4" vent pipe
Product Weight: 50 lbs. Shipping Weight: 100 lbs Shipping Carton: Width 27", Height 35", Length 35"