The Excel is Sun-Mar’s best selling unit in North America, and for good reason. It is a high capacity Bio-drum™ toilet that is simple to operate, features proven technology and is extremely reliable. The Excel was the first ever self-contained toilet to be certified by the National Sanitation Foundation (NSF). So, when you purchase an Excel, you are purchasing a composting toilet that sets the standard.

The Excel has enough capacity that it can be used just about anywhere; in residences, cottages and even in light commercial applications.

Listed capacities refer to the amount of people, on average, using the unit per day. 


3 adults or families of 5


6 adults or families of 8

Electricity must be connected while the unit is in use for proper operation.

Maximum Amps (With Heater On)2.4
Fan Watts 35 
Heater Watts (When Thermostat switches it on)250
Average Power Use in Watts (Heater on 1/2 time)150

Like conventional toilets, all Sun-Mar products must be properly vented per the guidelines present in the unit’s owner’s manual.  

Vent Pipe2″ Thin-wall PVC

1″ OD

Optional for seasonal/vacation use
Required for residential/heavy Use

Measurements are stated in pounds (lbs) and inches.

Height:33 1/4″
Width:22 1/2″
Weight:60 lbs
Shipping weight85 lbs
Shipping dimensions28″ by 36″ by 36″

The Excel is available in two colors – white, on the left, and bone, on the right. 

Both colors are readily available, if you would like more information, please call Sun-Mar’s sales team at 1.888.341.0782 ext 232, and they would be happy to answer any questions you have.