Sun Mar Centrex 3000 Air Flow (AF) Composting Toilet Systems
The Centrex 3000 AF (Air Flow) is a continuous compost flow design for very heavy cottage or medium residential use. With a continuous flow system, rotation of the drum moves compost along the larger and longer 3000 series drum, before it drops automatically into the collection housing at the end of the unit. Under normal operating conditions the drum will not have to be turned backwards for emptying. Sun-Mar waterfree toilet systems can only be used where the toilet can be placed directly over the composting unit.
All A/F units are supplied with a 1" drain hose which should be connected to the 1" drain at the bottom left of the unit. Liquid output, if any, should be collected or drained into an approved facility. Under seasonal or light residential use, the Centrex 2000 AF and Centrex 3000 AF should be able to evaporate all liquids; hookup of the drain is still recommended as a safety measure. Odor free operation is maintained by a fan which pulls air down through the toilet seat and up the vent stack.
Sun-Mar waterfree systems use the handsome Sun-Mar Dry Toilet in either white or bone ( item #TS11730), fitted with a removable bowl liner, and connected to the central composting unit by means of a 10" diameter pipe section.
HOW TO DECIDE WHICH IS RIGHT FOR YOU: When it comes to picking the right unit for your needs, first decide whether you need an electric or non-electric unit. If you have continuous 110 Volt power, an electric unit is suggested. These feature a 370 watt 120v thermostatically controlled heater in a sealed compartment beneath the unit, and a standard 30 watt turbo fan directing air up a 2" vent stack. The combination of fan and heater are able to evaporate up to 9 litters of liquid per day; depending on usage there may be little or no liquid output.
If you have no electricity, then a non-electric (NE) unit is the right selection. Non-electric units are supplied with a 2.4 watt 12 Volt fan to assist updraft on the 4" stack. The absence of heat and reduced air flow limits evaporation on NE units.
AC/DC units are dual vented units with about a 2" and 4" vent for those who expect to have 110v power in the future, or are running a generator for 12 or more hours per day.
MODELS: The CENTREX 3000 AF has a capacity of 5-7 residential use and 8-10 weekend/vacation use.The Centrex 3000 AF features a 370 watt 120 volt thermostatically controlled heater in a sealed compartment beneath the unit coupled with the standard Sun-Mar 30 watt turbo fan and 2" vent stack.
The CENTREX 3000 AF NE has a capacity of 5-7 residential use and 7-9 vacation/weekend use. The Centrex 3000 AF NE features a 4" vent stack which is used to vent the unit passively. We also include a 12 volt 2.4 watt fan that is required in the vent stack to assist airflow.
The CENTREX 3000 AF AC/DC has a capacity of 4-6 residential and 6-8 vacation use in AC mode. In DC mode, the capacity is 3-5 residential and 5-7 weekend/vacation use. The Centrex 2000 A/F AC/DC combines the features of the non-electric and electric units to produce a hybrid unit that will be ideal for those anticipating 110 volt power in the future, those who are in an area that sees frequent power outages, or those who would like to take advantage of the evaporative capacity of the heater when 110V electricity is available to them. While in AC operation, the unit should not require that an overflow drain be connected, unless it is being used heavily. While in DC operation, the overflow drain should be connected.
Manufacturer's specifications and rough-in drawings are available upon request. NSF certified.
Sun Mar Centrex 3000 Air Flow (AF) Composting Toilet Systems 
The Centrex 3000 AF (Air Flow) is a continuous compost flow design for very heavy cottage or medium residential use. With a continuous flow system, rotation of the drum moves compost along the larger and longer 3000 series drum, before it drops automatically into the collection housing at the end of the unit. Under normal operating conditions the drum will not have to be turned backwards for emptying. Sun-Mar waterfree toilet systems can only be used where the toilet can be placed directly over the composting unit.
