First Composting Toilet to Be Listed With NSF Standard 41
Excel was the first self-contained composting toilet in the world to
be tested and listed with NSF (the National Sanitation Foundation).
NSF listed Excel, 1989.
Sun-Mar is the only small-load composting toilet system (cottage
and regular residential use) to be listed with the NSF!!
is the only body which lists and certifies composting toilets
under Standard 41. While some may test to the same standards, only NSF
Listed products may bear the NSF mark (at right).
all stages of the operation of the unit and the finished compost to
exacting standards. Please click on the link here
to be taken to their website.
here to see a copy of the NSF Test Report for the Sun-Mar Excel.