What are the best waterless toilets for tiny houses?

Many Australians are turning towards tiny homes to help them live a lifestyle that isn’t locked into huge debt, massive mortgages and high yearly expenses for electricity, water and rates, etc. 

Tiny homes have seen a huge uptake in popularity in the past few years and it’s not surprising. More and more people are looking to remove their dependency on town water, electricity and municipal services like sewerage and wastewater removal.

With tiny homes being, well… tiny, it’s super important to utilise space as best you can so it makes sense to find a composting toilet that’s small enough to fit into the space you have available but will suit your needs when it comes to managing waste. 

First things first, let’s talk about smells

There are questions we get asked regularly at Ecoflo… ‘Do composting toilets smell?’ ‘Can you smell poo when you use a composting toilet?’ among other questions. Don’t worry, you can’t phase us, we’ve heard all the questions when it comes to composting toilets and the dreaded topic of ‘poo smells’. 

The bottom line is that composting toilets don’t smell if used correctly. If your composting toilet smells, this is an indication that you’re doing something wrong or there’s an issue with your pile. 

Common factors for composting toilets smelling:-

  • Your exhaust fan has stopped working
  • Your exhaust fan is not working to full capacity
  • You’re not adding enough organic matter after each use
  • There is too much liquid in your composting pile
  • You’ve killed the bacteria and micro-organisms in your composting pile by:-
    • Allowing your pile to become too cold
    • Using harsh chemical cleaners
  • There could be something blocking your exhaust vent (foreign matter, birds/wasps nest, etc)

The benefits of a composting toilet in a tiny home

Because a composting toilet is a fully self-sufficient waste management system, there’s typically no need for council approvals or large connection fees associated with connecting to sewage systems or septic tanks. 

As many tiny homes are built on trailers so they’re movable, it makes sense to have a toilet system that doesn’t require you to disconnect a whole bunch of services (like water, electricity and waste) before you can pack up and move. 

Let’s look at some loos!

OK… now that we’ve covered a few of the things you will want to consider in a tiny home when it comes to toilets, let’s take a look at some models. 

The Sunmar GTG Toilet

This is an ultra-compact composting toilet that’s been purposefully designed for boats, caravans and tiny homes. It’s sleek look and unlimited capacity makes it a great choice for tiny homes. This is a vented toilet so there’s no smell and you will need access to power to run the fan system (can easily be hooked up to solar – see our Electrical and Solar page for more info).

Some quick points about the Sunmar GTG:-

  • Easy to use
  • Sleek design
  • Unlimited capacity
  • Easy to install
  • Can be hooked up to solar
  • Self-contained unit
  • Separates solids and liquids

View Sunmar GTG


The Nature Loo Mini

Another sleek little unit that will fit nicely into almost any tiny home. This is a urine diversion unit that keeps solid waste and liquid waste in separate containers. Made from marine-grade fibreglass this low maintenance composting toilet can easily be used by a couple or small family as their regular toilet in a tiny home. 

Features of the Nature Loo Mini:-

  • Easy to install 
  • Low maintenance 
  • Can easily hook up to solar
  • Soft-close toilet seat
  • Comes with everything you need to get started

View Natureloo Mini


The Clivus Multrum CM2 (with chamber screen)

Another great little two-person full time composting toilet that’s well suited for tiny homes. Easy to install (you can install it yourself) and compact, this self-contained toilet is low maintenance and sits directly on your bathroom floor.

Key features of the CM2:-

  • Inbuilt chamber screen
  • Easy to install
  • 100% waterless
  • Unlimited capacity
  • Can be hooked up to solar
  • Comes with everything you need to get started

View Clivus Multrum CM2


The Nature Loo NL2 

A simple and elegantly designed compact composting toilet, the NL2 is a perfect composting toilet for two people in a tiny home. It comes with 2 x 32-litre containers which means two people can use this toilet full time. 

Key features of the NL2:-

  • Totally self-contained
  • Low maintenance 
  • Install it yourself
  • Doesn’t use any water
  • Can be hooked up to solar
  • Ships with everything you need to install and get started

View Nature Loo NL2 


If you’re looking for more advice or information about composting toilets for tiny homes, feel free to call us on 1300 138 182.