Notes from Manufacturer:
The Sun-Mar’s unique patented Bio-Drum™ tumbler optimizes mixing, oxygenation
and moisture distribution. No other composting toilet includes a rotating drum.
Evaporation is optimized via large surface areas, heating evaporated surfaces,
and well-designed air flow. The finishing drawer collects compost from the Bio-Drum,
isolating it from new compost and allowing it to dry before removal.