Every living organism consumes nutrients and creates waste. To transform waste back to nutrients and complete this cycle, nature uses the processes of decomposition and evaporation. As is often the case, nature seems to be doing business in the best way possible.

That’s why Sun-Mar toilets are designed not only to harness these natural processes but to optimize and accelerate them.


Toilet waste is over 90% water content. This can be evaporated and carried back to the atmosphere through the vent system. The small amount of remaining material is recycled into a useful fertilizing soil.

Sun-Mar units are economical, quick to install and easy to use because no chemicals and no septic systems are used, fragile environments can be protected. A Sun-Mar composting unit is an environmentally healthy choice for recycling human waste. The Sun-Mar system produces no pollutants while collecting nutrients. With a Sun-Mar, recycling is made easy!


sun-mar-centrex-3000-drawingAs well as ensuring anaerobic breakdown in the Bio-drum, Sun-Mar ensures an odor free environment by engineering the air flow within the unit to maintain a partial vacuum at all times. Air is being drawn in either by a fan (or on non-electric units by the vent pipe) over the evaporating chamber and up the vent stack. Not only does this evaporate excess liquid, but by continuously pulling air in we ensure no smell escapes from the unit.



Evaporation is assisted by electric units by a thermostatically controlled heater in a sealed compartment underneath the evaporating chamber.



Our Design

Composting Chamber



Evaporation Chamber



Finishing Drawer