8 Best Composting Toilet for Tiny House 2022


Created At 1 year ago

There are numerous alternatives for the best composting toilet for tiny houses on the market, but not all tiny house toilets are equal. Knowing your requirements, expectations, and desire to maintain an alternative toilet will assist you in selecting a toilet that suits your lifestyle and enhances the pleasure of your new house.

A composting toilet might be the answer if your mobile home or compact house lacks the infrastructure to sustain a regular flushing toilet. This unique toilet breaks down human waste with aerobic bacteria and stores it in a tidy, easy-to-remove container. Composting toilet separate liquids from solids, then breaks down solid waste with organic components and bacteria to produce human waste (a.k.a. humanure). If your local rules allow, you may dispose of this waste in a trash bag, but you can also use it in your garden—yes, even on edibles!—if you choose.

A high-quality composting toilet will minimize odors and leaks, which is especially important in a compact living area but has many other aspects to consider. This article will support you in getting that selection by describing why the following composting toilets are among the finest on the market.

Reviews of Best Composting Toilet for Tiny House

Now that you have a larger conclusion of the best composting toilets, here are some of the most excellent options. You might be able to locate the best composting toilet for your requirements here.

1. Separett Villa 9215 AC/DC

Check out the Separett Villa 9215 composting toilet for an all-around high-quality composting toilet. This waterless self-contained composting toilet uses an electric fan to exchange gases and may be used in a house or boat, or RV with a 12V system. It’s lightweight, weighing only 34 pounds, and it’s simple to set up.

The toilet, adapters for both 110V and 12V electricity, and all parts for direct venting and connecting the liquid drain into a greywater system are all included in the package. The tank is large enough for an average-sized household to utilize for three weeks.

2. Sun-Mar Excel Self-Contained Composting Toilet

When seeking an environmentally-friendly toilet, the Sun-Mar Excel Electric Waterless Composting Toilet is worth considering. An electric fan is used to dry liquids in this composting toilet, but it also draws air into the tank and pushes waste gases out of the vent to eliminate smells. Three individuals or a family of five can fit in the self-contained tank.

3. Nature's Head Self Contained Composting Toilet

Efficiency is crucial when it comes to small composting toilets. To begin with, the rubbish being composted should have no odour. The compost should be safe to handle after that. The liquid component should finally be evaporated. All of this appears to be accomplished by the Nature’s Head model, and it does so without generating any compost byproduct odours. The toilet separates liquid waste into its container using a dry composting approach.

4. SUN-MAR GTG Portable Toilet

When looking for a compact, portable toilet that composts, the Sun-Mar GTG Composting Toilet is worth considering. The self-contained GTG generates the same compost as other, much larger toilets, unlike other travel versions that still need to be emptied into a sewer. The GTG is a 12V-powered waterless toilet with a fan. It separates liquids from solids and divides them into two containers that are easier to remove. It weighs just under 30 pounds and measures 24 inches deep by 15.75 inches wide and 19.8 inches tall so that it will fit in most compact houses, RVs, and campers’ restrooms without difficulty.

5. Nature's Head Dry Composting Toilet

Nature’s Head Dry Composting Toilet with Crank Handle is a reliable and easy composting toilet solution for a cabin, boat, or RV. This self-contained toilet features a durable, molded plastic construction that is suitable for boats and RVs, as well as rust-resistant stainless steel fittings. It has a detachable liquid jug that separates liquids from solids. It features a 12-volt fan and a 5-foot vent pipe for exhausting gases.

6. Sun-Mar Compact Self-Contained Composting Toilet

The Sun-Mar Compact is a smaller version of Excel and is better suited to small families with up to two persons. It’s not as big as the Excel model, but it’s a lot more appealing. It features a low-profile, stylish design that will fit into most compact areas. Sun-unique Mar’s Bio-drum is used to shrink it. It has a smaller diameter in the front and a larger diameter in the back.

The drum is stirred using a single agitator handle. It extends from the unit’s front. The fact that it disappears into the unit’s body is a beautiful space-saving feature that Nature’s Head versions don’t have. This model’s front-operated handle makes it excellent for small areas, but it’s not perfect for short-length restrooms. This composting toilet is one of the tiniest on the market.

7. Reliance Products Luggable Loo Toilet

The Luggable Loo is about as simple as a toilet for your compact house can get. It’s just a 5-gallon bucket with a plastic toilet seat affixed to the top. The genius of it is that these buckets are sturdy enough to hold the majority of people. They’re also made to be completely airtight. It is ideal for something that will use to store garbage.

8. Porta Potti 92306 White Thetford Corp

Deservedly the gold standard for portable toilets, the Porta Potti Curve from Thetford will perfectly fit your camping, travelling, and boating needs. Long gone will be the days of digging cat holes in the wild or dashing 100 meters to the campground toilets at night. A look behind the curtain reveals that the Curve’s manufacturer, Thetford Corp, is an award-winning company for its innovative yet environmentally conscious products. 

Composting Toilet Buying Guide

Check to see if a composting toilet will function in your area before buying one. Self-contained and split/central systems are the two sorts, and while they both break down waste, they operate differently and have distinct needs.

A self-contained system:

A self-contained system includes a tiny toilet with a removable tank and a liquid drain for waste removal. Some self-contained systems are portable, making them ideal for camping vacations or boat journeys. They may also be set up in areas where plumbing isn’t available, such as a workshop or garage.

As the name implies, the whole composting process takes place within the toilet. When the tank is filled, remove it and empty the manure. Freshwater tanks or supply lines are occasionally included in these systems to flush waste into the chamber below.

Central System or Split System:

Composting toilets that are connected to a central or split system are comparable to regular toilets. They link to a network of pipes that transport trash to a central bio-drum, hopper, or tank, where it is composted. The garbage is churned in the hopper, which allows it to decompose while simultaneously releasing odorless fumes. When the tank reaches capacity, empty it as if it were a self-contained toilet.

Because split systems require a hopper, which is generally put beneath the toilet, they are significantly more costly than self-contained composters. The hoppers are helpful since they enhance the amount of compost that can store. These composting toilets are an intriguing option for permanent off-grid or environmentally aware houses, but their design makes them unsuitable for mobility.

Available Space:

Composting toilets take up a little more room on the floor than regular toilets, and they don’t have a separate holding tank to deal with. Look for a compact model with a smaller waste tank if you’re building a tiny house or boat.

If room for a split system is available, the greater holding capacity may be worth the expenditure. Adding a hopper to areas like garages and cottages is occasionally possible. Installing the tank outside is a possibility in warmer climes.

Composting vs. Portable:

Although a portable toilet and a composting toilet may appear identical, there are several key distinctions. Microorganisms break down human waste in composting toilets. They distinguish between liquids and solids, allowing bacteria to feed on the organic chemicals found in both. Humanure can be used to strengthen a lawn or garden after it has been composted. The composting process produces a byproduct that fertilizes the soil and provides nutrients to plants.

That is not the case with a portable toilet. Everything flows into one waste tank with portable toilets, and liquids and particles are not separated. Even after adding enzymes and deodorizer to the tank to break down particles and mask odors, the final product must still be disposed of through a sewage or septic system. While portable toilets are convenient for camping and boating, they may not be ideal for permanent housing such as mobile homes and compact houses.

The Capacity of Tank:

When looking for the best composting toilet, consider how many people will be using it. It will help you estimate how much of a tank you’ll need. Manufacturers frequently categorize this based on the size of the family and the intended usage.

A split system with a large tank, for example, might manage the waste of three adults or a family of five, but a self-contained composting toilet with a five-gallon tank would suffice for one adult. The theory is that by appropriately designing the tank, waste will have enough time to decompose into manure before it fills up.

Use of a Utility:

The aerobic bacteria that break down the waste require a lot of oxygen, abundant in the air. A fan that pulls air into the tank and across the waste is powered by electricity in specific composting toilets. It also vents the carbon dioxide produced by the bacteria into the atmosphere. Many functions with a 110V system in the home, while others work with 110V AC and 12V DC from a vehicle or RV battery.

A water line may be required for a composting toilet. While it may seem paradoxical, water-using composting toilets use considerably less water each flush than a typical household toilet. There are also waterless and non-electric versions available, so consider your utility arrangement and household budget when selecting a toilet.

Odor Elimination:

The gases must be produced by the microorganisms in a composting toilet evacuated. Otherwise, smells may develop, and the bacteria’s function may deteriorate due to a lack of oxygen. The blower that draws air into the tank on some versions also drives gases out of the vent, removing odors. After each use, add organic materials, such as sawdust, on top of the waste to cover the scent while allowing the bacteria to break down the solids.

We’ve compiled a list of the best composting toilets for tiny homes below. Each of these toilets is for its capacity to work daily and its ability to be on the move without spilling if you decide to take your small house on the road.


The bottom line is that these toilets aren’t cheap! Despite their rudimentary appearance, they attract high fees. That’s where we’re at with the entire “going green” issue right now. It appears to be subject to a tax, which is unjust. Nature’s Head model, on the other hand, is currently the cheapest model of actual quality available.

It also has a teeny-tiny footprint. The spider handle model takes up only 18″ (W) x 17.75″ (L) of floor space (allowing a few more inches to rotate the handle comfortably). If you’re building a tiny house or RV, this model is worth looking at. Finally, we suggest this toilet since it is long-lasting. It’s made to last, with a 5-year warranty included.

However, we have listed the best composting toilet for a tiny house. If you want to know more then you should read this article and find for yourself.

Frequently Asked Questions (FAQs)

Answer: The Sun-Mar Compact is a smaller version of Excel and is better suited to small families with up to two persons. It’s not as big as the Excel model, but it’s a lot more appealing.

Answer: Liquid and solid waste are generally separated in toilets. Substantial trash will be collected in one chamber and mixed with peat moss to aid in the decomposition of the garbage. Otherwise, you’ll be able to compost the solid waste.

Answer: Composting toilet rules do not often apply to households that also have a flush toilet. If the following requirements are satisfied, a composting toilet does not generally breach any regulations (even when it is not explicitly authorized) in existing homes: Your composting area and toilet are both on your property.

Answer: Yes, you must drain it as well, but it is less dirty and odorous. The composting toilet differs from a water-based system in that urine and solid waste is collected separately in the composting toilet. As a result, the outcomes aren’t as obnoxious. You won’t even need to utilize your black tank.

Answer: It is possible to redirect urine away from the toilet, although it is not required. If there is pee in the mix, more sawdust is added to soak up the extra liquid. Composting toilets are frequently utilized in places where wood shavings, leaf duff, or other appropriate cover is readily available.

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