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FAQ

What happens to the smells in the solid tank?

In the Air Head, solids are moved under the composting medium and agitated to encourage aerobic bacteria, which act as a natural odor filter, producing a minimal, earthy scent from the included, external fan and vent. This can be installed through external walls or ceilings, and for boats, venting into an anchor locker with external air passage is effective.

For more help with installation, check out our Installation Guide.

By separating both, It helps to reduce moisture in solid waste, speeding up composting and massively reducing odors. It also helps manage nutrient levels, ensuring a more efficient process. Finally, it reduces the amount of times you will need to empty the solids tank.

Once urine and feces are separated, the solid waste is mixed with a carbon-rich material, like our Coco Peat Bricks, which act as a composting medium. This mixture creates the perfect environment for aerobic bacteria to thrive. These bacteria break down the waste into compost, a nutrient-rich soil additive, through a natural, odor-free process.

Absolutely! More and more liveaboards are moving to Air Head Toilets because it allows you to take your boat to areas which are tightly regulated by waste water laws or regular pump outs. It is also much easier to maintain, with fewer moving parts than a traditional manual or electric head would require, meaning you can carry less spares, and spend less time dealing with toilet problems.

Yes! There is no better option for RVers, either full time, or weekenders. Which is great for boondocking. It opens up so many opportunities to not have to find dump station facilities, or places which sell chemicals. Instead, you are free to roam wherever you want, not planning your route around your toilet!

So, the solids tank can take, on average 80 uses. So, if 2 people use the toilet every day, it will last 1 month. But if 2 people are only using it at weekends, it can easily last a full season. Of course it can be emptied more frequently if you are happy to do so.

For liquids it will also depend on usage. But, for 2 people, the small tank will need to be emptied every 1-2 days, and the large tank will last 2-4 days.


When at home, solids from your Air Head should be emptied into a dedicated compost pile or bin, where they’ll further decompose into usable compost for non-edible plants. Away from home, the solids can be placed in a plastic bag and disposed of in a trash receptacle.

The fan is designed to provide continuous air flow, aiding in the composting process and helping to minimize odors by evaporating excess moisture. While it’s generally recommended to keep the fan running to ensure the system operates effectively, it can be turned off for short periods if necessary. Extended periods without the fan may hinder the composting process and could lead to increased odors, along with limiting the ability to repel insects

Yes, Air Head Toilets are completely custom. When ordering, you can choose which options suit your install best, allowing you to easily build the toilet around your space.

Air Head’s exclusive rounded shape will fit into even the smallest locations. Check out our dimensions page for more detail on sizing to see if it fits your space!

We make it as simple as possible. Clean the bowl with vinegar and salt to maintain hygiene. Inspect and clean the fan and vent system for unobstructed airflow, and agitate the composting material to aid decomposition. Check the rubber seals for integrity to prevent leaks and odors. Adjusting the composting medium helps maintain optimal compost moisture. Following these simple routines ensures your toilet remains efficient and hygienic over time.

Optimal composting occurs at temperatures between 55°F (13°C) and 100°F (38°C). Within this range, the aerobic bacteria that break down waste are most active, leading to efficient composting and odor control. At lower temperatures, the composting process slows down, as microbial activity decreases. Conversely, if the temperature gets too high, it can kill the beneficial bacteria or lead to excessive moisture loss, hindering the composting process. The Air Head is designed to maintain a balanced environment for composting, but it’s beneficial to be mindful of external temperatures.

Winterizing the Air Head Composting Toilet in an RV or boat involves a few key steps to ensure it remains functional and odor-free during colder months:

  • Empty the Unit: Empty both solids and urine containers before cold weather.
  • Clean Thoroughly: Use natural cleaners for a thorough clean of the entire unit.
  • Add Antifreeze: If occasionally in use, add non-toxic antifreeze to the urine bottle.
  • Maintain Ventilation: Keep the fan and ventilation system running to prevent moisture build-up.
  • Insulate Pipes/Vents: Insulate external vents or pipes against freezing.
  • Monitor Moisture: Adjust composting medium levels to manage moisture in colder temperatures.
  • Use a Heater: In extreme cold temperatures, consider a seedling mat heater under the unit to maintain composting temperatures.


Absolutely! We have made the install very user friendly for anyone to be able to have up and running in a few hours. Simply follow our installation guide, here: [LINK]

The included fant is designed for low power consumption, making it ideal for use in RVs, boats, and off-grid setups. Typically, this fan uses around 0.06 amps per hour. Given its continuous operation, it translates to approximately 1.44 amp-hours over a 24-hour period. This efficient use of power ensures that the fan can run continuously without significantly impacting your battery life, maintaining effective ventilation and odor control with minimal energy usage.

For first-time users encountering issues with their Air Head Composting Toilet, here are some essential troubleshooting tips to ensure everything runs smoothly:

  • Follow installation guide: Proper fan placement and attention to detail during installation are crucial. Any odors inside your living space often point to a ventilation issue, so double-check that the system is set up correctly.
  • Balance the composting medium: Make sure you’re adding the right amount of composting medium. The ideal texture is crumbly and moist but not overly wet, like mud. This balance is key to effective composting and odor control.
  • Monitor moisture levels: If you notice strong odors near the exterior vent, it’s a sign that there’s too much moisture in the solids tank. By adding more composting medium, this helps manage moisture levels. Less medium means less evaporation, but be aware that this might also lead to more frequent tank emptying.

Remember, these tips are aimed at optimizing the performance of your composting toilet and minimizing issues related to odors or maintenance. For more detailed guidance, refer to the user manual or reach out for support.

Generally, restrictions will be different depending on location, but typically it is ok to use any compost in flower beds, or in your garden, just don’t use it on anything you plan to eat (fruit or veggies). It is generally permitted to dispose of it in the trash as long as it is in a sealed bag. But you are still advised to consult local authorities to find out if there are any location specific rules to follow.

It’s best to avoid chemical-based household cleaners, like bleach, in your Air Head as they can disrupt the composting process by killing beneficial bacteria. Opt for natural, non-toxic cleaners like vinegar, baking soda, or eco-friendly products designed for composting toilets. These alternatives keep your toilet clean and ensure the composting system works effectively and safely for the environment.

In general, there are very few things that can go wrong in your system, which makes maintenance great. However, if you are going away for months or years, we recommend that you carry:

  • Fan Replacement: Keeping a spare fan (and electrical wiring) ensures the ventilation system remains operational.
  • Spare Lids: In case you drop or misplace a lid for the liquids, order a few extra.
  • Composting Medium: While not a “part,” having an extra supply ensures you can maintain the proper composting mix.

Having these items ensures that you can deal with most maintenance or repair needs without a trip to town, keeping your system running smoothly in off-grid situations.

Our brand new model, Tejo, was built with this in mind. It comes without a urine tank, which allows you to install the urine directly to an existing holding tank. This allows you to go much longer without emptying tanks, improving the whole experience.

It’s important to note that U.S. regulations prohibit the discharge of untreated urine into any waterways. However, internationally, this isn’t always the case. (Check your local laws and regulations)

Our brand new model, Tejo, was created to be able to direct urine to an external tank. However, in theory, you could also direct urine directly overboard via an existing thru-hull.

For the installation, we recommend connecting a hose from the Air Head to a Y-valve (diverter valve), with one outlet leading to an internal tank and the other to your thru-hull, incorporating a pump inline to prevent backflow and ensure efficient disposal. This setup reduces the need for frequent emptying, thereby enhancing the usability and convenience of your toilet system.

Again, Always ensure compliance with both local and international maritime laws when configuring your system for waste disposal.

For the composting process in the Air Head toilet, we highly recommend using coir bricks (also known as coco peat) due to their compactness and ease of use. However, a variety of other materials can also serve effectively as a composting medium. These include sphagnum peat moss, non-kiln dried sawdust, coffee grounds, and paper-based pet bedding. While these alternatives can be utilized, it’s important to note that the outcome of using naturally sourced materials can vary, and we cannot guarantee the consistency of the results.

Why Do Our Customers Love Air Head?

I keep telling our customers about your (Air Head) system. We now have been using it for 8 years. We are doing the Baja HaHa this year. I’ll make sure to let all the cruisers about AirHeadToilet.

Ari Castano - Advanced Marine Electronics

Thank you for designing such a great product. Airhead is the first boat toilet we have had that didn’t have any odour! My wife loves it. We no longer dump our maceratored sewage into the Georgia Strait, so that feels good as well. We will sing your praises to all we meet…

Norm Gleadow on "Blue Socks" R25

The airhead composting toilet is a fantastic toilet for van life. It’s the best composting toilet on the market.

Clare - Everywhere With Claire

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