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| Our Code: SUMEXCEL-BONE |
Sun-Mar ExcelLong considered the standard in composting toilet performance, the EXCEL is the preferred self-contained electric model for heavy or residential use. Composting speed and capacity on this unit is outstanding! The large Bio-drum engineered into the Excel gives it twice the capacity of compact models.
The Excel has been successfully tested by the National Sanitation Foundation for six continuous months at its maximum residential capacity of four adults. Key criteria were that the unit operated odorlessly, and produced a clean dry compost. For weekend and vacation use the capacity is 6-8 people, and even these numbers can be doubled for short periods.
The 2" vent is attached at the top rear of the unit and can be installed invisibly by running it through the wall and up the outside wall. For comfort, the Excel has a detachable footrest which can be removed to pull out the finishing drawer.
Although the Excel can normally evaporate all liquids, a ½" 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.
Composting Is Nature's WayWherever there is a poorly working septic system, a Sun-Mar can take care of the toilet waste; where there is an outhouse we offer the luxury of an indoor facility; and where there is no toilet at all, a Sun-Mar provides the right environmental choice. Sun-Mar units are economical, quick to install and easy to use.
Because no chemicals and no septic systems are used, fragile environments can be protected. A Sun-Mar composting unit is an environmentally healthy choice for recycling human waste.
The Sun-Mar system produces no pollutants, while collecting nutrients.
As well as ensuring an aerobic breakdown in the Bio-drum, Sun-Mar ensures an odor free environment by engineering the air flow within the unit to maintain a partial vacuum at all times.
Air is being drawn in either by a fan (or on non-electric units by the vent chimney) over the evaporating chamber and up the vent stack. Not only does this evaporate excess liquid, but, by continuously pulling air in it ensures no smell escapes from the unit.
Note: Composting units cannot be used on a continuous basis in temperatures less than 50° F. The microorganisms of decomposition go dormant in lower temperatures. This problem can be overcome by insulating the composting area and heating it with a 100 watt incandescent bulb.
| Capacity | *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) | 3 adults or families of 5 |
| Seasonal/Vacation (Adults/Families) | 6 adults or families of 8 |
| Electricals | *Electricals must be connected while the unit is in AC use for proper operation* |
| Maximum Amps (With Heater On) | 2.4 |
| Fan Watts (Required or Optional Hookup) | 30 Required |
| Heater Watts (When Thermostat switches it on) | 250 |
| Average Power Use in Watts (Heater on 1/2 time) | 150 |
| Unit Dimensions | |
| Height/Width/Depth | 32" by 22 1/2" by 33" |
| Vent & Drains | |
| Vent Pipe | 2" Central Vacuum Tubing (PVC Thinwall) |
| Drains (Required or Optional Hookup) | 1/2" Drains, Optional Seasonal/Vac use, Required for Residential/Heavy Use |
| Weights (Lbs.) & Dimensions | |
| Product Weight/Shipping Weight | 60/100 |
| Shipping Carton Dimensions (W by L by H) | 27" by 35" by 36" |
| Depth Required to Remove Drawer | 48" |
| Vent outlet center distance from right side | 8 1/2" |
| Height to center of vent | 25 3/4" |

Shipping cartons include (at no extra cost) everything needed to install and operate the unit. The only exception is the 3" plumbing pipe and fittings needed to connect a 1 pint flush toilet to a central composting unit.
Contents of Shipping Carton
Warranty
All units carry a full 5 year replacement warranty on the fiberglass tank,
and a comprehensive 3 year replacement warranty on all other parts.
More Information:
In our How-To section:
...and installation instructions at SunMar's information sites:
Central Systems
Self-Contained Systems