Centrex NE Series
With no fan and heating element, the Centrex NE non-electric composting chambers allow for one to have a traditional looking toilet (or toilets).  Usage level will dictate which model of the Centrex series is appropriate for a particular situation.  To maximize air flow, the vent stack should be erected as close to vertical as possible. An optional 12V fan may be installed if the unit is to be used heavily or residentially, or is in a place surrounded by mountains or tall trees where downdraft can occur. This fan can be powered either by a solar panel, and/or 12V battery. It is supplied in an 11” long section of 4" pipe for installation in the vent stack.  For use with Sun-Mar toilets (purchased separately). Electric models also available. shipping information
Sun-Mar Centrex NE 1000 Capacity: 4 people weekend/vacation use only
Dimensions: 27-1/2”H, 26-1/4”D 
Weight: 45 lbs. net, 90 lbs. shipping
$ 1249
Sun-Mar Centrex NE 2000 Capacity: 6-8 people weekend/vacation use, 3-5 people residential use
Dimensions: 27-1/2”H, 26-1/2”D 
Weight: 87 lbs. net, 108 lbs. shipping
$ 1549
Sun-Mar Centrex NE 3000 Capacity: 8-10 people weekend/vacation use, 5-7 people residential use
Dimensions: 31-1/2”H, 26-1/2”D, 69-1/2”W 
Weight: 96 lbs. net, 202 lbs. shipping
$ 1649
Sun-Mar Vent Fan 12 VDC vent fan & solar panel 
For increased air flow.
$ 159