All You Need To Know
About Composting Toilets

New to composting toilets? This guide will tell you everything you need to know, from our sustainability experts.
Composting toilets are a great way to go green in your home. They require no water or electricity, and they can be used by people of any age!
Read on to learn everything you need to know about composting toilets - such as the processes involved in how they work, and an everyday guide to how to use one. We've also created an extensive list of the most popular brands and types of compost toilet systems on the market today, so you can learn what is the best composting toilet.

How does a composting toilet work?

A composting toilet is a type of dry toilet that treats feces through a biological process known as composting.
This process decomposes organic elements, transforming human waste into compost. Microorganisms undertake composting under controlled aerobic circumstances (primarily bacteria and fungus). Because the majority of these toilets do not use water to clean or flush, they are referred to as "dry toilets" or "waterless toilets."

After each use, a carbon addition such as sawdust, peat moss or coconut coir is supplied to assist decompose the solid waste in various types of composting toilets. This method creates air gaps for the aerobic decomposition of human excrement.

This also raises the amounts of carbon and nitrogen, which reduces possible odors.
And you still have unanswered questions, be sure to read our full article on how composting toilets work.

How Does A Composting Toilet Work?

Come and take a deep dive into the nitty gritty processes of how a composting toilet actually works. This simple, sustainable technology has been used for thousands of years and is now making a much-needed comeback!

How To Flush A Toilet Without Water


Are you living off-grid and need a flushless toilet solution? Read on to learn how you can do it.

How Should I Compost Human Waste?


OK, I've got a shiny new composting toilet. Now, what should I do with all this lovely human waste!?

Those Facts About Compost That You've Been Dying to Ask


Oh yes. We know what keeps you awake at night. Never fear, this post will answer those burning questions about compost.

How Much Does A Composting Toilet Cost?


We explore all the different options, from DIY to the more expensive models on the market to give you a clear idea of the costs involved.

Oh No! There's Mold In My Composting Toilet!


Oh shit! There's mold in my composting toilet. Why is that happening and what can I do about it?

How To Use A Composting Toilet


What's it actually like living with and using a composting toilet on a day-to-day basis? We answer all those burning questions you have, and then some!

NSF Certified Composting Toilets


What is NSF, what are the standards and which toilets meet them?

What Are The Pros And Cons Of Composting?


Surely it can't all be good news can it? There must be some cons to composting? Right??

Is This The Ultimate Small Footprint Toilet?


With a growing global interest in climate change and sustainability, families nationwide are looking for actionable things that they can do in their own households to make a difference.

With sustainable living becoming increasingly popular, there are a plethora of eco-friendly product and service businesses to select from.

There are a variety of composting toilets available, including Nature's Head, Sun Mar, Airhead, and Separett, to mention a few, including models such as the centrex 3000, nature's head dry composting toilet and nature's head composting toilet with spider handle and crank handle.

AlasCan, Clivus Multrum, CTS, EcoTech Carousel, Phoenix, and Sun-Mar Centrex are popular systems, with costs ranging from $1,400 to more than $10,000 depending on the system's capacity, volume and intricacy.

When you're just getting started, it might be daunting to weigh out all your options and manage your budget, but our articles on the top four household brands, Nature's head, Airhead, Sun Mar and Separett Villa will undoubtedly calm your worries.



Before deciding on whether it is worth spending extra money on the various kinds of of composting toilet, consider these factors: do you live in an area where water conservation is important? Do you work in an industry where spills are common (e.g., hospitals)?
This article on the whether composting toilets provide the savings you seek, can aid you in answering that question.

Recommended Composting Toilets

ImageProductOur ScoreLearn More
Most Reliable
Sun Mar GTG Portable Toilet
Sun Mar GTG Portable Toilet

Sun Mar has a patent for the most efficient composting method, all while having a long-standing history of creating and producing composting toilets. 

Check Latest PriceRead Full Review
Best Value
Separett Villa 9215 AC/DC
Separett Villa 9215 AC/DC

Separett has been developing waterless toilet solutions for over 40 years with the goal of improving quality of life and making everyday living easier and more pleasant for everyone.

Check Latest PriceRead Full Review
Best Overall
Nature's Head Composting Toilet
Nature's Head Composting Toilet

The Nature’s Head composting toilet is one of the most popular models out on the market right now. Tiny house owners absolutely love them, and for good reason too. 

Check Latest PriceRead Full Review
Best Value
Air Head Composting Toilet
Air Head Composting Toilet

A convenient installation for mobile lifestyles. It eliminates the need for water flushing, is easy to use, has a female-friendly design, and is water efficient, 

Check Latest PriceRead Full Review


The composting toilet is a relatively new technology that has been gaining popularity in recent years.

One of the main reasons for this increase is because people are starting to realize how bad our current sewage system really is. The old-fashioned flush toilet has not changed much over the last 200 years, and it's time we start exploring other options.

In this article, we will discuss all the different types of composting toilets and what living environment or type of person they're best for.

Self contained composting toilet or central composting toilet system

Self-contained toilets are distinguished from central systems by the fact that they are a single, self-contained unit. The pedestal and the composting chamber are the two primary components of central systems.
Because self-contained composting toilet systems are all-in-one, they are excellent for conventional houses constructed on concrete slabs, homes with no underfloor space, and boats. This makes the central composting systems ideal for homes with a space beneath them.
Commercial ventilation systems carry air from the bathroom, via the waste container, and out a vertical pipe that vent hose or vent stack, above the roof. Carbon dioxide and odors are carried by this air movement, typically through an exhaust fan.

But how does an incinerating toilet work?

Incinerating toilets actively eliminate your waste by incinerating it right after you use the facility. This toilet does not flush your waste; alternatively, it burns it!
The incineration process happens through the use of a burning chamber that's lined with insulation made from materials like wool, felt, or stone.

DIY For Off-Grid bathrooms

The majority of us in the West grew up with a regular toilet such as the flush toilets, but many people like us, believe that contemporary comfort and luxury is not worth the harm it causes to climate change and water system, or the fertility it robs from our soil.
An off grid composting toilet is a self-contained, waterless and odorless toilet system. It's designed to be installed in areas where there is no access to running water or sewage systems, like when you live off grid with limited freshwater supply or sanitation infrastructure.
The design of an off grid composting toilet includes three main parts: the holding tank, the composter and the ventilation fan - these are all combined within one portable package that can easily be set up by just about anyone!
There are many simple and effective ways to build your own self contained composting toilet, as a cost effective alternative to buying composting toilet products from a company such as Sun mar or Nature's head where the prices can go up to the thousands.
Most of the DIY methods only require a toilet seat, a bucket and some bedding material such as peat moss.
With finances and budget often getting in the way of being as environmentally friendly as you would like, DIY options are one way of being cost effective.

Composting Toilets in Action

What most people don't realize is that the sort of toilet you choose for your home, has a long-term influence on how you use the bathroom and long term environmental impact, so don't rush into it.
This is why it's important to look through comparisons of the different models and option you have for your toilet.

Composting toilets are environmentally friendly toilets that may be found and installed in a cabin, RV, off grid, marine, tiny house, and even for your own home and bathroom.

Composting toilets, unlike traditional septic systems, do not utilize water and do not require connection to a septic or sewer system.
They function by turning trash into useable organic compost, which is an important resource for landscaping.

The waterless function and lack of need for traditional septic systems and plumbing, makes the composting toilet systems ideal for off grid use, cabin use and simply for your home when you want to live a greener lifestyle.

The waterless function and lack of need for traditional septic systems and plumbing, makes the composting toilet systems ideal for off grid use, cabin use and simply for your home when you want to live a greener lifestyle.


In this article, we will discuss all the different types of composting toilets and what living environment or type of person they're best for.



You may not know that composting toilets are classified into two types: self-contained and central composting toilets.



In recent years, the costs of purchasing, installing and maintaining a residential solar panel system have plummeted



Electric toilets are a great option if you have limited space or don't use much water, but they do come with their own set of pros and cons.



Although it is quite a new idea and system, solar powered toilets are eco-friendly because they use sunlight for energy instead of electricity or gas, and they also look pretty cool too.



In this article, we discuss composting toilet vs incinerating toilet and the benefits and drawbacks of both



Portable composting toilets are the perfect solution for outdoor enthusiasts. They're light, easy to transport, and environmentally friendly.

Composting toilet

In this blog series, follow Fiona and Nick's Journey to going from using the standard cassette toilets to an easier and more sustainable way of managing their waste. Follow their thought process as they research and then make their purchase, install and get to grips with life with a Composting Toilet.

Nick works from the boat (luckily IT can be done anywhere!) and Fiona retired early to help look after her grandchildren.

They love the peace and tranquility of being so close to nature and the freedom to cruise the canals when they want, taking their little home with them.
Follow there blog for the ins and outs of installing a composting toilet and any tips for if you decide to do the same!

Episode One - Introduction To Nick & Fiona

We are Fiona and Nick, and since the Autumn of 2017 we have lived on a 63ft narrowboat called Meand’er on the inland waterways (canals) of the UK.

In this blog series, we will share our journey as we go from using standard cassette toilets to an easier and more sustainable way of managing our waste.

Nick works from the boat (luckily IT can be done anywhere!) and I retired early to help look after my grandchildren.

Episode Three - Should We Buy Or DIY?


Now I am very fortunate to have a husband who is great at DIY! He is currently rebuilding the kitchen in our RV, but he didn’t seem quite so keen when I suggested we could build our own composting toilet.

Episode Seven - Installing On The RV


Having already installed one composting toilet on our boat, doing the same in our RV should be easy... right!?

Episode Four - The Final Choice


After a year of research (a tad excessive maybe?!), we arrived at a final decision as to which composting toilet to buy!

Episode Eight - Living With Our Composting Toilet (Liquids)


Six weeks in and we've got into the swing of using our composting toilet. Read all about our experience with 'liquids'!

Episode Five - Getting Ready To Install


As we're installing composting toilets in both our RV and narrow boat, there was quite a bit of prep work to do to ensure the installation process went smoothly.

Episode Nine - Living With Our Composting Toilet (Solids)


Our first six weeks with our composting toilet have been eventful! Find out what insights we have to share on solids.

Episode Two - The Research Begins


As we began our research it became obvious there wasn’t just one composting toilet, in fact there were many! We needed to determine what the differences were and how they would affect our toilet choice.

Episode Six - Installation Day


The big day was finally here! Join us as we go through the installation process step by step, complete with domestics!


Human consumption and contamination of freshwater has reached a point where water scarcity may restrict agricultural production, ecosystem functionality, and urban drinking water supply in the next few decades.
This makes it all the more important to use the composting toilet system as an alternative to regular, conventional toilets.
The composting process and composting toilet designs are acknowledged by the World Health Organization as a sanitary alternative to conventional toilet.
The above articles and FAQ's can help you to understand the purpose of a composting toilet and the composting process as a whole.