Hello, Thank you for your question. The emptying of a Sun-Mar self-contained toilet, including this Spacesaver model depends on how often it is being used (residential vs. weekend/vacation/seasonal use). Each model has it's own capacity rating for both residential and seasonal applications, therefore the timeline will not change across each different model/type of Sun-Mar composting toilet - In residential applications, where the toilet is being used every single day, finished compost will be taken out approximately once every three months. In weekend/vacation/seasonal applications, where the toilet is being used primarily on weekends and/or only during certain times of the year (spring, summer etc.), finished compost will be taken out approximately once, or at most, twice a year - so in both cases, not very often. The end product will be finished compost (or dirt, top soil, fertilizer etc.) which you can use on grass, tree's, plants and flowers etc. All Sun-Mar self-contained toilets are emptied by pulling out the finishing drawer, located at the bottom front of the toilet. Each toilet comes with a very thorough owner's manual and detailed instructions on how to use them. Very easy to maintain and operate a Sun-Mar toilet. Please do not hesitate to contact Sun-Mar should you have any additional questions - Toll Free at 1-888-341-0782 Ext. 232. Thank you.
Date published: 2019-01-19