When you’re building or moving into a tiny house, you might be considering adding a composting toilet. These toilets eliminate the need to be hooked up to public water and septic systems. Plus, they’re environmentally friendly!
We’ve compiled a list of the 5 best compost toilets for tiny houses to help you choose a toilet that fits your needs.
- Separate containers for urine and solids collections
- Vent hose and van help to circulate air
- Single chamber design
- No water nor electric needed
- Central system design sends liquid waste to greywater system or chamber
- Handles a large volume of waste
- Compact and easy to move
- Dual-chamber system
- Urine separating design
- Built-in fan
5 BEST COMPOST TOILETS FOR TINY HOUSES
This self-contained composting toilet is made in the USA by Nature’s Head. It contains a urine separating design, so users must empty the urine tank and solids tank separately.
When it’s time to empty, the toilet quickly dissembles for easy emptying. This design helps to decrease odors, and the toilet’s built-in fan circulates the air and eliminates odors in your tiny home’s bathroom.
The toilet features an attractive design and all stainless hardware. It is important to note that the seat is a bit higher than those of some other toilets, so children may require a stool to climb up.
- Easy to install
- Does not produce many odors
- The spider handle allows the toilet to fit into narrow spaces
- Users must frequently empty the urine bottle
- Urine diversion sometimes cannot handle a strong stream, leading to urine entering the solids container
The Sun-Mar Excel is the perfect composting toilet for the off-grid tiny home. It doesn’t require water or electricity, but it can handle the waste of 2-3 people in a residential setting.
The toilet doesn’t come with any built-in fan, but if you want to increase airflow in the toilet, you can add a 12V or solar fan.
Both the liquid and solid wastes enter into the same Bio-drum compartment; this is a single chamber toilet. Users can manually turn the waste in this compartment to evenly distribute moisture and speed up composting.
- There’s no need for water or electric
- The Bio-drum is easy to turn via the recessed manual handle
- The sleek design fits into any bathroom
- The overflow drain can leak if not installed correctly
This waterless and urine-diverting composting toilet sends urine to a greywater system or holding tank. This tank can be located below a home, or nearby.
The solid waste is held in a separate holding container inside of a compostable bag. This means that users don’t have to empty the waste chambers as frequently, making it perfect for frequent use.
While this toilet doesn’t require water, it does require electricity. The single-speed fan operates on either AC or DC battery and can be vented to as far as 20 feet away.
Since the urine is separated from the solids, this removes any odors that occur when urine and fecal waste mix. The fan also does an excellent job of removing any underlying odors.
- There’s no need to empty a small urine-holding container
- This system is odor-free
- No need to manually turn a solids container
- Requires electricity
The GTG composting toilet is a compact toilet that can fit just about anywhere – perfect for the space-limited tiny home. It has a simple design that is easy to install, understand, and operate. And it doesn’t require any water.
The toilet features a dual-chamber system that helps separate solids and liquids into different chambers. The solids chamber can hold up to six gallons.
It’s important to understand this is a very simple design. If you’re looking for a system that is easy to understand, this might be the toilet for you. However, the simple design does mean that it requires frequent emptying.
- Fits in tiny spaces
- Very simple design
- The built-in fan helps keep odors at bay
- Users must frequently empty the chambers
This self-contained toilet features a urine separating design, so liquids go to one chamber while solids enter another chamber. When it comes time to empty the toilet, users must empty both the liquids and solids chamber.
This dual-chamber design helps eliminate odors, and a built-in fan with a five-foot vent hose decreases odors even further. The fan does require electricity or a solar panel.
The standard crank handle is used to mix the solid waste, which helps increase aeration and speed up the composting process.
The toilet is a bit bulky with a molded design that is a bit utilitarian. The toilet’s seat is higher than those on other toilets.
- Crank handle makes it easy to turn solid waste
- The separate liquids and solids chambers decrease odors
- Easy to install and use
- The design is a bit bulky, especially with the crank handle
WHAT TO CONSIDER WHEN BUYING A COMPOST TOILET FOR TINY HOUSES
How many people will be using the toilet
It’s important to consider how many people will be using your composting toilet. If you have a big family or will be having lots of guests over to your tiny home, you’ll probably want a toilet with a larger waste capacity.
You can also consider using a central-system toilet that sends waste to a larger holding tank or greywater system. If you choose a central system design, you’ll rarely have to empty your waste tank.
However, if you are the only person in your house, or if you’re gone a lot of the time, you’ll be fine with a toilet that has a smaller waste capacity.
Whether or not you have access to electricity
Some composting toilets require electricity to operate internal fans. While most of these toilets can be operated off of solar power, you might not want to deal with that.
An alternative option is to choose a toilet that relies on batteries to operate the fan. You can also choose a super simple design without any fan, but this can lead to unpleasant odors.
The amount of space you have for the toilet
Since you’re looking for a composting toilet for a tiny home, you’re probably looking for a small and compact design. However, some composting toilets are smaller than others.
Before you buy a toilet, make sure you take a look at the dimensions of the toilet (and be sure to take the handle size into account).
Another thing to think about is how much space you’ll have to navigate from your bathroom to your exterior door. Carrying five gallons of waste is harder than two gallons.
If you don’t want to have to walk around corners with waste, you might be better off with a toilet that contains a central-system design.
A composting toilet can be a great choice for a tiny home. They remove the need for water as well as sewer systems, fitting into the simple design of these houses. Even more, they are eco-friendly and can create nutrient-rich compost for your surrounding garden. But remember, it’s still important to learn the basics of composting!
However, before you choose a composting toilet, make sure you think about which toilet fits your needs. Read through the pros and cons, and think about what is important for your home. Chances are, one of the five we’ve listed above will work great for your tiny home.