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AccessoriesContinuous Composting Toilets
Compost in an ongoing process
Continuous Composting Toilets
What is Continuous Composting?
Continuous composting involves using a large container where new material is added at one end or the top, and finished compost mulch is taken out from the other end. This system is often compared to batch composting, where composting happens in discrete, separate batches. The key advantage of continuous composting lies in its ongoing process, which requires less frequent intervention and offers consistent composting outcomes.
Benefits of Continuous Composting
The greatest asset of continuous composting is its long service intervals. Unlike batch composting, which demands regular switch between composting containers, continuous composting systems can operate for extended periods without requiring maintenance. This makes it an ideal solution for those who prefer low-maintenance, efficient waste management.
Additionally, because the composting units are fixed in place, they can usually be half-buried underground. This way installed, the CF composting toilets do not require as much space underneath the bathroom floor.
Our Continuous Composting Toilet Models:
CF 4 and CF 8
How CF systems are used
CF continuous composting toilets are used just like any regular toilet. The toilets come with a porcelain-made dry toilet pedestal that is fixed in to the bathroom. The toilet looks and feels like any other normal toilet you are used to. The only difference is that the toilet isn’t flushed. Male users can also urinate standing if preferred, unlike with the other commercial urine-diverting toilets with which all users must sit.
How CF Systems are installed
The CF composting toilets are split-system composting toilets, meaning that the composting unit is intended to be installed under the bathroom/outhouse floor level. The composting unit has to be directly below the toilet so that all waste falls into the composting unit through the waste pipe.
The CF 4 is our split-system composting toilet with the lowest profile when partially buried (= needs least space below floor level). If you do not have any clear space below your bathroom, you should have a look at our self-contained waterless toilet options.
The CF toilet’s sub-floor composting unit is delivered without a ready-made hole for the waste pipe. This allows a little flexibility for the installation, so that the dry toilet pedestal does not have to right in the center of the system.
How CF Systems are serviced
The service of CF composting toilets involves shoveling of ready compost from one end of the sub-floor composting unit. The CF composting containers have a hatch on the other end of container that is opened to empty the container. A wheelbarrow is useful when emptying the toilet.
Unlike like you might assume, the toilet waste does not smell at all and should no longer be recognizable as toilet waste. We recommend using dry material such as hemp or peat to improve the compost quality when using the toilet.
CF 4 Composting Toilet – Estimated Daily Capacity
The CF 4 is a continuous composting toilet system featuring a single large 105-gallon container. Unlike batch composting systems (such as the Green Toilet models), the CF 4 is designed for gradual emptying — solids are typically removed in thirds or sections, allowing earlier deposits time to fully compost inside the tank.
This setup allows for either:
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Year-round use with gradual emptying, or
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Seasonal use (e.g. 4–5 months/year) with full emptying once per year
🔁 Continuous Use: Gradual Emptying in Thirds
When used year-round, the CF 4 is typically emptied one-third at a time, effectively composting in three rotating “piles” within the container. Depending on composting conditions and how much bulking material is used, each pile can hold approximately 200–400 poops.
| Service Interval (per pile) | Estimated #2 Visits per Day |
|---|---|
| 30 days (1 month) | ~7–13 visits/day |
| 60 days (2 months) | ~3–7 visits/day |
| 90 days (3 months) | ~2–4 visits/day |
| 180 days (6 months) | ~1–2 visits/day |
| 365 days (1 year) | ~0.5–1.1 visits/day |
💡 These figures assume that one third of the tank is in active use at a time, with older waste given time to compost before removal.
🌤 Seasonal Use: Full-Tank Emptying After Inactive Period
For cabins, cottages, or other sites used seasonally, the CF 4 can be used for a few months and then left idle to allow full composting. In such cases, the entire tank may be emptied once a year.
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Full-tank capacity estimate: ~600–1,200 poops
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Example: 120 days of use (approx. 4 months):
→ ~5–10 solid visits per day on average
CF 8 Composting Toilet – Estimated Daily Capacity
The CF 8 is a continuous composting toilet system featuring a single large 250-gallon container. Like the CF 4, it is designed for gradual emptying rather than batch-style use. Solids are typically removed in thirds or sections, allowing earlier deposits time to fully compost inside the tank.
This setup allows for either:
-
Year-round use with gradual emptying, or
-
Seasonal use (e.g., 4–5 months/year) with full emptying once per year
🔁 Continuous Use: Gradual Emptying in Thirds
When used year-round, the CF 8 is typically emptied one-third at a time, effectively composting in three rotating “piles” within the container.
Because the CF 8 is more than twice as large as the CF 4, each pile can hold approximately 480–960 poops, depending on composting conditions and how much bulking material is used.
| Service Interval (per pile) | Estimated #2 Visits per Day |
|---|---|
| 30 days (1 month) | ~17–32 visits/day |
| 60 days (2 months) | ~8–16 visits/day |
| 90 days (3 months) | ~5–11 visits/day |
| 180 days (6 months) | ~3–5 visits/day |
| 365 days (1 year) | ~1.2–2.6 visits/day |
💡 These figures assume that one-third of the tank is in active use at a time, with older waste given time to compost before removal.
🌤 Seasonal Use: Full-Tank Emptying After Inactive Period
For cabins, cottages, or other sites used seasonally, the CF 8 can be used for a few months and then left idle to allow full composting. In such cases, the entire tank may be emptied once a year.
Full-tank capacity estimate: ~1,440–2,880 poops
Example: 120 days of use (approx. 4 months):
→ ~12–24 solid visits per day on average
⚠️ Disclaimer
These numbers are rough estimates based on typical use and conditions. Actual capacity will vary depending on:
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Climate (temperature and humidity)
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Ventilation and air flow
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How much dry bulking material is added
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User behavior and emptying practices
For best performance, ensure proper aeration, regular bulking material use, and consistent emptying of composted portions.
Consider a Urine-Diverting Toilet
If you’re looking to maximize the capacity of the CF 4 system, we recommend using a urine-diverting (UD) toilet pedestal.
✅ Benefits of Urine Separation:
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Reduces or eliminates the need for dry bulking material, which frees up valuable space in the composting unit
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Helps keep the compost drier, more aerated, and better suited for natural decomposition
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Increases the total capacity of the composting container
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Can lead to faster and more efficient composting, especially in high-use environments
By diverting urine out of the solids container, the volume taken up by absorbent material (like peat or wood shavings) is significantly reduced. This can make a noticeable difference in how often the system needs to be emptied.
⚠️ Downsides to Consider:
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Urine-diverting toilets can take some time to get used to. Users need to sit or aim correctly to ensure proper separation, which might not happen consistently without experience or guidance.
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For this reason, UD toilets are generally not ideal for public or commercial settings where the toilet is used by guests, tourists, or other first-time users. In these cases, misuse can reduce the effectiveness of the system and may even lead to unpleasant maintenance issues.
In short: A UD toilet is an excellent choice for maximizing capacity in private or family use, but for guest or public access composting toilets, a standard non-diverting model may be more practical and user-friendly.
