A composting toilet must perform three completely separate processes:

  • Compost the waste and toilet paper quickly and odorlessly
  • Ensure that the finished compost is safe and easy to handle
  • Evaporate the liquid

Many years ago Sun-Mar engineers realized that to work properly, these three tasks required independent chambers, each with its own separate environment. This revolutionary new three chamber approach first developed in 1979 proved so successful that today it is incorporated into all Sun-Mar units.

Our commitment to superior design makes Sun-Mar the wise choice for anyone who wants a durable and high quality product. Click on the corresponding part in the diagram to discover the separate use behind each of our three chambers.

The Evaporation Chamber Sun-Mar's Patented Bio-Drum The Compost Finishing Drawer The Evaporation Chamber The Compost Finishing Drawer Sun-Mar's Patented Bio-Drum