The Excel is the best-selling unit in
North America and for good reason. It is a high capacity Bio-drum toilet that
is very simple to operate, features well proven technology and is extremely
reliable. The Excel was the first ever self-contained composting toilet to be
certified by the National Sanitation Foundation (NSF). So, when you purchase
an Excel, you are literally purchasing a composting toilet that sets the
The Excel has enough capacity that it can be used just about anywhere;
in residences, cottages and even in light commercial applications.
To simulate residential use the Excel was tested by the National
Sanitation Foundation (NSF) at maximum capacity for 6 continuous
months, during which the Excel produced no odour and produced a
clean, safe compost. Only Sun-Mar self-contained units are listed
for residential and cottage use by NSF, whose Standard #41 is the
toughest composting performance standard in the world.
The 2" vent is attached at the top back of the Excel and can
be installed invisibly by running it through the wall and up the
outside wall. For comfort the Excel has a sturdy detachable footrest
which can be removed to pull out the finishing drawer.
In normal use the Excel can normally evaporate all liquids, however
a 1" emergency drain is fitted at the rear and this
should be connected if the unit is to be used residentially or heavily,
or if prolonged power outages are expected.