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    SKU: SM-SS
    Designed for 1 person full-time and up to 3 people part-time, Sun-Mar Spacesaver 240 is a compact composting toilet made for small spaces. Spacesaver 240 is a fantastic choice for baches, sleep-outs, cabins, or any location where there is access to a reliable power supply.

    Choose the Product options below

    Add a wind-driven vent to create redundancy.
    The wind-driven vent will assist the fan under heavy wind conditions and keep the system going in case of power outage or fan failure.

    Required for adaption to smaller vent pipes.

    Note: systems with 50mm piping will require a mounting stay (not supplied).

    Extend your drain pipe to reach your soak pit/trench.

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

    Most soakaways 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 - Special Order | (3-4 months, Estimated Time of Arrival(ETA))
    $3,515.91 excl GST
    excluding shipping
    i h
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     AVAILABILITY: this system is Special Order, please enquire about procurement timeframes 

    Designed for 1 person full-time and up to 3 people part-time, Sun-Mar™ Spacesaver 240 is a compact unit made for small spaces.

    Sun-Mar™ Spacesaver 240 is a fantastic choice for baches, sleep-outs, cabins, or any location where there is access to a reliable power supply.

    Featuring Sun-Mar's™ patented Bio-drum™ technology, the Spacesaver is a true composting system that processes the compost in two stages within the unit itself.

    The Spacesaver is a Bio-drum™ toilet that is very simple to operate, features well-proven technology, and is extremely reliable. 

    Spacesaver 240 has enough capacity to be used in tiny homes, sleep-outs, sheds, cabins, or baches.

    Featuring Sun-Mar's unique Three-Chamber Design, the Spacesaver optimizes composting by staging the process and creating optimum environments at each stage. The Bio-drum™ receives a combination of waste and bulking agent to create the right composting balance. Excess liquids are drained into the Evaporation Chamber, from which they are evaporated with a heating element. Rotating the Bio-drum breaks up and aerates the compost, ensuring aerobic decomposition. Finally, the Finishing Tray matures compost and prepares it for burial.

    The Spacesaver is actively fanned for aeration and odour-free operation. A 2" vent is attached at the top back of the unit and can be installed invisibly by running it through the wall and up the outside wall.

    For comfort, the Spacesaver has a sturdy, detachable footrest that can be removed to pull out the finishing drawer.

    In normal use, the Spacesaver can evaporate all liquids, however, a 1" emergency drain is fitted at the rear for overflow, to ensure effective performance in case the toilet is used heavily or if prolonged power outages occur.


    Sun-Mar Composting Toilet Systems are CSA certified for electrical features under CSA file number LR55925

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

    To simulate residential use the Spacesaver was tested by the National Sanitation Foundation (NSF) at maximum capacity for 6 continuous months, during which the it produced no odour and a clean, safe compost. Only Sun-Mar self-contained units are listed for residential and cottage use by NSF, whose Standard #41 is the toughest composting performance standard in the world. 

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


    Sun-Mar is certified by the NSF under this stringent standard. Testing is conducted for 6 months at an NSF recognized, independent testing laboratory under a strict test protocol. 

    To be certified, the unit must operate odour-free at maximum capacity (including overload conditions) and produce clean, safe compost. 

    What you need to know about Composting Toilets


    As additional verification, NSF obtains and tests additional compost samples from randomly selected field operations, and conducts interviews with the users of these units. For verification, please check the NSF website. 

    NSF International is a not-for-profit, non-governmental organization. It is the world leader in standards development, product certification, education, and risk management for public health and safety, and for 75 years has been committed to public health, safety, and protection of the environment.


    All Product short copy and long copy is the property of Waterless Composting Toilets NZ Limited. Copyright © 2023 WCTNZ® | Waterless Composting Toilets NZ. All rights reserved.