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In 1971 Hardy Sundberg of Sun-Mar developed the world’s first self-contained composting toilet.

For the first time a self-contained toilet could be put in a bathroom and would evaporate liquids and compost solids.

The next big technical breakthrough came in 1979 when Hardy developed his third generation toilet which incorporated a rotating drum as the composting chamber. This was a three chamber design which used separate chambers for composting, evaporating, and compost finishing. Now the environment for each function could be optimized individually.

In keeping with the family tradition, a Sundberg still leads Sun-Mar’s research and development effort. Sun-Mar remains the world leader in composting toilets. Each model is designed to fill a specific need, and each is distinguished by innovative design, superior technology, and Sun-Mar’s legendary quality.

The way a Sun-Mar works is not only unique, it is also elegantly simple. Common sense tells us that the best way to compost is to use a drum. Luckily for Sun-Mar, our many international patents ensure that only Sun-Mar can take full advantage of the benefits a drum offers for mixing and aeration.


SAI Certification


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


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Sun-Mar Compact 240

The Compact is an elegant low profile unit with the looks to complement any bathroom. Sun-Mar engineers designed this low profile toilet by developing and patenting a new variable diameter Bio-drum which is small at the front and large at the rear. To maintain the uninterrupted lines of the Compact, a patented Bio-drum handle recesses into the body of the unit to mix and aerate the compost.
$3,100.00 incl tax

Sun-Mar Excel NE (Non Electric)

If you’re in a situation where you need to be off-the-grid and completely self-sufficient, then this is the Sun-Mar model you want to look at. The Excel NE model was first designed in 1981 and still today it remains the standard setting unit for completely non-electric composting toilets.
$3,200.00 incl tax

Sun-Mar Excel 240

The Excel is the best-selling unit in North America and for good reason. It is a high capacity Bio-drum toilet that is very simple to operate, features well proven technology and is extremely reliable. The Excel was the first ever self-contained composting toilet to be certified by the National Sanitation Foundation (NSF). So, when you purchase an Excel, you are literally purchasing a composting toilet that sets the standard.
$3,650.00 incl tax

Sun-Mar Mobile™

The Sun-Mar Mobile™ waterless toilet has been specifically designed to continue operating under the normal stresses onboard a mobile home or boat. The system has sufficient processing capacity to allow several weeks of coastal water or mobile home use without recourse to pump out facilities. 12-week indent product**
$3,240.00 incl tax

Sun-Mar Centrex 2000 NE (Non Electric) - A/F (Air Flow)

The Centrex 2000 A/F (Air Flow) NE is a low voltage, waterless “off-grid” alternative to the straight Centrex 2000 model. 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.
$4,750.00 incl tax

Sun-Mar Centrex 2000 NE (Non Electric) - M/F (Micro Flush)

Perfect for medium to heavy seasonal or light residential use, the Centrex 2000 NE allows for both a longer composting cycle and larger waste volumes.
$4,720.00 incl tax

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