Sun-Mar Compact Medium Capacity Composting Toilet Electric


Last updated on September 15, 2023 5:19 am


Sun-Mar Compact Medium Capacity Composting Toilet Electric

The Compact is an elegant low profile unit with the looks to complement any bathroom. Sun-Mar engineers designed this low profile toilet by developing and patenting a new variable diameter Bio-drum which is small at the front and large at the rear. To maintain the uninterrupted lines of the Compact, a patented Bio-drum handle recesses into the body of the unit to mix and aerate the compost.


The Compact differs from the Excel in that all three chambers are smaller, which makes the Compact ideally suited to light residential or light to medium cottage use.


As with the Excel, a 2″ vent stack attaches to the rear of the Compact. A 1/2″ emergency drain at the rear offers protection against heavy or residential use, or prolonged power outage.



Listed capacities refer to the amount of people, on average, using the unit per day. Do not pick a unit that is below your capacity.


Residential/Continuous (Adults/Families) 1 adults or families of 2
Seasonal/Vacation (Adults/Families) 3 adults or families of 4


Electricals must be connected while the unit is in AC use for proper operation


Maximum Amps (With Heater On) 2.0
Fan Watts (Required or Optional Hookup) 35 Required
Heater Watts (When Thermostat switches it on) 200
Average Power Use in Watts (Heater on 1/2 time) 125

Vent & Drains


Vent Pipe 2″ PVC Thinwall
Drains (Required or Optional Hookup) 3/4″ O.D optional

Weights (Lbs.) & Dimensions


Product Weight/Shipping Weight 50-90
Shipping Carton Dimensions (W by L by H) 28″ by 35 1/2″ by 30 1/2″
Depth Required to Remove Drawer 45″
Vent outlet center distance from right side 7 1/2″
Height to center of vent 23 1/2″
Unit Height/Width/Depth 28 1/2″ by 21 1/2″ by 33″


Manufacturer’s Warranty: 5 years on the fiberglass tank and 3 years parts replacement on all other parts