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    Sun-Mar™ | Centrex 3000 NE (Non Electric) - A/F (Air Flow)

    Brand: Sun-Mar™
    SKU: SMC-3000 NE A/F
    Centrex 3000 NE A/F — high-capacity non-electric underfloor Air Flow split system for larger holiday-house or medium residential demand in off-grid applications.

    Choose the Product options below

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    Please select the primary pedestal (toilet fixture) option you would like to accompany your composting system.

    Note; that the Urine-Diversion (UD) pedestal option is most suitable where there is high use in peek or large family gatherings.

    Note; that with Urine Diversion, it is recommended that the compost mass is kept wet to avoid the pile drying out. Consider getting the hand-held bidet sprayer accessory for facilitating the hydration of compost.

    A hardwearing Nano-Ceramic Non-Stick Coating is applied onto the inner side of the Pedestal (toilet fixture) for maximum cleanliness.

    Note; basic cleaning will still be required.

    Note; non-stick is hydrophobic and repels liquids only.

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    Choose the fan voltage to match your power system.

    ABS pipe (US spec) is supplied with the toilet. This is suitable for straight horizontal vent stacks.

    If you'd like to adapt the unit to NZ pipe, please select this kit. You will need NZ pipe if you're looking to create elbows and bends.

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    You may need additional vent materials depending on how many storeys your building has.

    Single Storey buildings with a high-profile roof (A frame or mono-pitch) require extra lengths of vent pipe - add one 800mm Vent Pipe Extension

    Double Storey buildings require extra lengths of vent pipe. Please add 4 x 1m Vent Pipe Extensions.

    Double Storey building with a high-profile roof (A frame or mono-pitch) require extra lengths of vent pipe - add one 800mm Vent Pipe Extension

    Kit for stepping the vent stack around the eaves of the roof. Allows you to avoid penetrating the roof.

    A wind-driven vent offers the best redundancy for your system ventilation. The wind-driven vent will assist the fan under heavy wind conditions, keeping the system operational in the event of a power outage or fan failure.
    SharkVent™ | Wind Ventilator has high efficiency with a linear wind direction windvane (good for storm-prone areas).
    Universal Vent ACC | Wind-Driven Vent has high efficiency in low windage. 2 colours: white or black.

    Select this reducing collar to adapt the vent from 150mm to 100mm.

    Select this reducing collar to adapt the vent from 150mm to 100mm.

    Select this reducing collar to adapt the vent from 150mm to 100mm.

    Extend your soft connection leachate drainpipe to reach your hard connection leachate drainpipe or soak-pit/trench.

    Soft connections allow for flexible placement of the composting tank in relation to a hard connection or drain.

    The system is packed with 1 meter of 25mm leachate drainpipe as a standard.

    Extend your leachate drain via in-ground hard connection to reach your soak-pit/trench (soak-away).

    Most soak-aways should be installed 3 meters away from the foundations of the structure but this remains circumstantial to the site.

    Run your leachate drain into a soak pit (vertical soak-away) or into a trench (horizontal soak-away).

    Availability: Availability - on backorder and will be dispatched once in stock (Special order – ready in approx. 3–4 months (non-stock item sourced specially from our supplier)).
    $8,593.76 excl GST
    excluding shipping
    Estimated delivery time: Approx. 1–2 weeks (NZ-wide)
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    Availability: Special Order — Call to Enquire

    Sun-Mar™ | Centrex 3000 NE (Non Electric) - A/F (Air Flow)

    The Centrex 3000 NE A/F is a high-capacity, low-voltage waterless underfloor composter designed for medium to heavy seasonal use and medium residential use. It is the off-grid alternative to the heated Centrex 3000 models and is intended for use with a waterless pedestal.

    Featuring Sun-Mar’s™ patented Bio-drum™ technology, the Centrex is a true composting system that processes compost in two stages within the unit itself. With a larger compost capacity than the Centrex 2000 A/F NE model, the 3000 NE A/F can comfortably accommodate up to 7 people in a holiday-house situation. In a residential capacity, compost needs to be emptied more frequently and it is suitable for up to 5 people.

    Capacity and Best Fit

    • Holiday / seasonal use: up to 7 people
    • Residential use: up to 5 people
    • Best suited to: larger off-grid cabins, holiday houses, and medium residential applications using a waterless pedestal

    Capacity note: Listed capacities refer to the number of people, on average, using the unit per day. Do not pick a unit that is below your real use case.

    How this system works

    The Centrex 3000 NE A/F is the non-electric Air Flow version of the Centrex 3000. The system is designed for use in conjunction with a waterless toilet pedestal and processes waste under the bathroom floor. The non-electric system is slightly smaller than its electric counterpart, but still offers significantly larger compost capacity than the 2000-series NE A/F model.

    There is no heating unit in this model, so it will operate well on solar or mains-supported low-voltage arrangements. Without the heater, the evaporation process is not as effective as in the 240-volt system, so an overflow drain to a small sub-surface gravel pit is required.

    A 100mm vent and low-voltage fan help to ensure that odours are dispelled with minimal electrical draw.

    NSF Performance Certification

    NSF/ANSI 41 Standard — Non-Liquid Saturated Treatment Systems

    This system is certified for liquid containment, odours, and solid end products.

    Sun-Mar is certified by NSF under a six-month independent test protocol requiring odour-free operation at maximum capacity and the production of clean, safe compost.

    SAI Global Certification

    Certification

    Australian & New Zealand Standard 1546

    SAI Global certified
    Licence Number: SMKH25591

    Sun-Mar™ Composting Toilet Systems are certified against the "AS/NZS 1546.2:2008 On-site domestic wastewater treatment units – Waterless composting toilets" standards.

    NSF: What you need to know about composting toilets

    NSF Fact Kit

    Note: the system does not include a starter pack. Please purchase bulking agent, microbes, and enzymatic cleaner separately.

    WCTNZ® is the exclusive authorised distributor of Sun-Mar™ composting toilets in New Zealand. All Sun-Mar™ products available through WCTNZ® are guaranteed authentic, include official manufacturer warranties, and come with comprehensive local customer support—making us New Zealand’s trusted source for sustainable, waterless composting toilet solutions.

    Before you choose, think:

    1. Your place — tiny home, bach, family home, RV, or public site

    2. Your building — whether it suits a self-contained or split composting toilet system

    3. Your needs — user numbers, maintenance preferences, and how off-grid you want to be

    To narrow it down properly, start with the Composting Toilet Guide.

    Open the WCTNZ® Selector Guide »