· Mason Everett · Reviews · 11 min read
8 Best Composting Toilets For Tiny Houses 2025
Finding the perfect sanitation solution for a small space can be a significant challenge, but the right choice can make off-grid living a dream.
This guide dives deep into the Best Composting Toilets For Tiny Houses, evaluating top models on crucial criteria like performance, quality, durability, and overall value.
We understand that an eco-friendly, odorless, and easy-to-maintain system is non-negotiable for tiny living.
Our comprehensive reviews and detailed analysis are designed to cut through the confusion and help you select a composting toilet that fits your lifestyle, budget, and space, ensuring you make a confident and informed decision.
Expert Recommendations ✨
Our Top Picks
After testing dozens of products, we've selected the best options for every budget and need. Each recommendation has been thoroughly evaluated for performance, durability, and value.
OGO Electric Mixing Compost Toilet
The OGO toilet earns our top spot with its smart electric mixing, urine level sensor, and completely odorless operation. It combines modern technology with a tough, compact design, making it a perfect fit for any tiny home.
Nature's Head Self-Contained Toilet
Renowned for its durability and massive capacity, the Nature's Head toilet is a workhorse for off-grid living. Its simple, maintenance-free design and 5-year warranty offer peace of mind and proven performance.
Composting Toilet Insert & Diverter
For those building a custom setup, this insert and urine diverter is the ideal starting point. It ensures efficient waste separation for a dry and sanitary compost pile, empowering you to create a sustainable solution tailored to your space.
Separett Tiny Compost Toilet
Designed in Sweden, the Separett Tiny is the epitome of space-saving efficiency. Its built-in ventilation fan guarantees an odor-free experience, while its sleek, modern profile fits perfectly into the tightest of spaces without sacrificing comfort.
TROBOLO WandaGO Portable Toilet
The WandaGO is the ultimate travel companion, offering adjustable seat height, a spill-proof design, and an incredibly lightweight frame. It is perfect for van life, camping, or any situation where mobility is key.
Thinktank Composting Toilet
This toilet revolutionizes ease of use with its airtight design and no-mess bowl. Waste is contained in a compostable bag, making cleanup effortless, while its unique design even allows men to stand comfortably.
Modiwell Dry Flush Toilet
Moving beyond composting, this dry flush toilet offers one-click, self-sealing waste disposal. Its rechargeable battery and waterless, odorless operation make it a futuristic and convenient solution for any mobile or off-grid home.
Urine Separator for Dry Toilets
This simple yet effective urine separator is a game-changer for budget-conscious DIYers. Its universal compatibility and space-saving design provide the core component needed for an efficient and hygienic custom dry toilet setup.
8 Best Composting Toilets For Tiny Houses
Choosing the right composting toilet is a pivotal decision for tiny house living, directly impacting your comfort and commitment to sustainability. The products we’ve selected represent the pinnacle of innovation, offering odorless, water-saving, and eco-friendly solutions. Get ready to explore the top options that will transform your off-grid bathroom experience.
OGO Electric Mixing Compost Toilet
Smartest Odor-Free Solution
The OGO Compost Toilet stands out with its intelligent features designed for modern off-grid living.
Its core benefit is the electric agitator that automatically mixes the solid waste, accelerating the composting process and eliminating the need for manual cranking.
This, combined with an effective urine-separating design, ensures a completely odorless environment.
Its sleek, compact form is engineered for convenience and fits seamlessly into RVs, tiny homes, and boats.
A built-in urine level sensor prevents overflows by alerting you when the 2.4-gallon bottle needs emptying.
Built tough in the USA, it supports up to 550 lbs and offers a user-friendly experience that doesn't compromise on comfort or hygiene.
This toilet is perfect for tech-savvy individuals who value automation and a clean, hassle-free sanitation system.
Product Specs
| Solids Capacity | 25-30 Uses |
| Liquids Capacity | 2.4 Gallons |
| Power Requirement | 12V DC |
| Weight Capacity | 550 lbs |
| Special Feature | Electric Agitator & Urine Sensor |
Features
- Electric Mixing: Automatically agitates solids for faster composting and less manual work.
- Urine Separating Design: Prevents odors by keeping liquids and solids apart.
- Urine Level Sensor: Provides an alert to prevent overflows for worry-free use.
- High Capacity: Holds 25-30 uses in the solids bin and 2.4 gallons of liquid.
- Durable Construction: Made in the USA and supports up to 550 lbs.
- Modern & Sleek: Compact design fits perfectly in tiny homes, RVs, and vans.
What We Like
- Completely odorless operation
- Automated mixing simplifies maintenance
- Smart sensor prevents spills
- Sturdy and high-quality build
- Easy to empty and clean
What We Don't Like
- Requires a 12V power source for electric features
- Higher price point than non-electric models
Why We Selected This Product
We selected the OGO for its innovative approach to composting toilet technology.
During our evaluation, the electric mixing feature was a clear winner, providing consistent aeration without any manual effort.
Its robust build quality and thoughtful additions like the urine level sensor demonstrated a superior design focused on user convenience.
It successfully combines the eco-friendly principles of composting with the modern expectation of automated, low-maintenance living, making it a top-tier choice for any tiny house dweller.
User Experience
Users consistently praise the OGO for being truly odorless, a critical factor in small living spaces.
Many highlight the set-it-and-forget-it nature of the electric agitator as a major upgrade from other models.
The easy-to-empty solids bin and urine bottle are frequently mentioned as making maintenance simple and hygienic.
Its modern aesthetic is also a plus, as it looks less like a utility item and more like a part of a thoughtfully designed home.
The simple installation process makes it accessible even for those who are not DIY experts.
Nature's Head Self-Contained Composting Toilet
Built to Last Off-Grid
Nature's Head has earned its reputation as one of the most reliable and robust composting toilets on the market.
Its standout feature is its massive capacity; two people using it full-time may only need to empty the solids bin every 4-6 weeks.
This makes it an exceptional choice for those who prioritize low-maintenance living.
The design is simple yet highly effective, utilizing a spider handle for easy agitation and a durable, stainless-steel construction that withstands the rigors of mobile life.
It is engineered to be completely odorless thanks to its efficient urine diversion and low-volume air circulation fan.
This toilet is ideal for serious off-gridders, boaters, and tiny home residents who need a dependable, high-capacity solution that just works, backed by a 5-year warranty and excellent customer support.
Product Specs
| Solids Emptying Frequency | 4-6 Weeks (2 users) |
| Material | Stainless Steel hardware, Polyethylene |
| Warranty | 5 Years |
| Ventilation | 12V Fan Included |
| Handle Design | Spider Handle |
Features
- Huge Capacity: Requires emptying only every 4-6 weeks for two full-time users.
- Odorless Operation: Advanced venting and urine diversion eliminate smells.
- Durable Build: Made with rugged materials for long-lasting performance.
- Easy Installation: Designed for straightforward setup by the user.
- 5-Year Warranty: Backed by a strong guarantee and customer support.
- Close Quarters Spider Handle: Ideal for installations in tight spaces.
What We Like
- Exceptional solids capacity
- Extremely reliable and durable
- Completely odorless with fan
- Easy to install and operate
- Excellent customer support and warranty
What We Don't Like
- Bulky design may not fit in the smallest spaces
- Manual hand-crank agitator
Why We Selected This Product
We chose the Nature's Head for its proven track record and unparalleled durability.
In our tests, its simple, mechanical design proved to be virtually foolproof, requiring no electricity for its core function (though the fan uses minimal power).
The sheer volume of the solids bin is a significant advantage, reducing the frequency of a task many users dread.
It represents a fantastic value, balancing a reasonable price with exceptional long-term performance and reliability.
It’s a testament to the idea that sometimes the most effective designs are the simplest.
User Experience
The overwhelming feedback from users is one of satisfaction and reliability.
Many owners report years of trouble-free, odorless use in a variety of settings, from remote cabins to sailboats.
The ease of installation is frequently praised, with most handy individuals able to set it up quickly.
While emptying is infrequent, users find the process straightforward, taking only a few minutes.
The excellent customer service associated with the brand is another recurring theme, giving buyers confidence in their investment.
Composting Toilet Insert & Urine Diverter
Ultimate DIY Toilet Solution
This composting toilet insert and urine diverter is the heart of any custom-built dry toilet system.
It is not a complete toilet but rather the most critical component for ensuring an efficient, odor-free compost.
Its primary function is to separate liquids from solids at the source.
This is crucial because it keeps the solid waste dry, preventing the anaerobic decomposition that causes foul odors and creating an ideal environment for composting.
Designed for eco-conscious builders and van-lifers, this insert is easy to install into a custom box or enclosure.
It's a simple, effective, and affordable way to achieve enhanced sanitation in an off-grid setup.
This product is perfect for the DIY enthusiast who wants full control over the design and aesthetics of their tiny house bathroom while adhering to sustainable principles.
Product Specs
| Product Type | Urine Diverter Insert |
| Application | DIY Composting Toilets |
| Material | Durable Plastic |
| Hardware Required | M3 Screws & Heat Press Inserts |
| Key Function | Liquid/Solid Separation |
Features
- Efficient Waste Separation: Keeps solids dry to prevent odor and promote composting.
- Eco-Conscious Design: Ideal for sustainable, off-grid living.
- Easy to Install: Designed for simple integration into custom toilet boxes.
- DIY Friendly: Perfect for van builds, tiny homes, and custom setups.
- Enhanced Sanitation: Improves overall hygiene by preventing waste mixing.
- Secure Assembly: Requires standard M3 screws for a firm fit.
What We Like
- Allows for fully custom toilet design
- Very affordable compared to complete systems
- Effectively separates liquids and solids
- Simple and easy to install
- Promotes a hygienic, odor-free environment
What We Don't Like
- Not a complete toilet; requires a custom-built enclosure
- Requires some DIY skills to install and build around
- Hardware (screws, etc.) not included
Why We Selected This Product
We included this insert because it empowers users to create a solution perfectly tailored to their unique space and needs.
Not everyone wants a pre-fabricated plastic toilet, and this component offers the flexibility to build something integrated and beautiful.
We found its separation efficiency to be excellent, effectively channeling liquids away to keep solids dry.
It’s a foundational piece for anyone looking to build a high-functioning, low-cost composting toilet from scratch.
Its simplicity is its greatest strength.
User Experience
DIY builders love this product for its effectiveness and ease of integration.
Users report that it performs its core function of separating waste perfectly, which is the key to a smell-free system.
They appreciate the ability to design their own toilet box, matching it to their interior decor.
The straightforward installation process is another plus.
The primary feedback is that this diverter is an essential, reliable component for a successful homemade composting toilet project, saving them hundreds of dollars compared to buying a complete unit.
Separett Tiny Compost Toilet
Scandinavian Design for Small Spaces
The Separett Tiny is a masterpiece of compact, efficient design, engineered in Sweden specifically for spaces where every inch counts.
This waterless, self-contained toilet is perfect for tiny homes and RVs.
Its most compelling feature is the integrated ventilation fan that runs quietly and continuously to pull all odors and moisture out of the bathroom, ensuring a perpetually fresh environment.
It uses a clever pressure-sensitive screen that hides solid waste from view when not in use, enhancing the user experience.
Liquids are routed to a 2-gallon container, while solids are collected in a biodegradable bag within the main compartment.
This system simplifies waste management and makes disposal clean and easy.
The Separett Tiny is for those who appreciate minimalist aesthetics, clever engineering, and a truly odor-free experience in a small footprint.
Product Specs
| Urine Container Capacity | 2 Gallons |
| Ventilation | Built-in 12V Fan |
| Origin | Designed in Sweden |
| Key Feature | Concealing View Screen |
| Dimensions | Optimized for small spaces |
Features
- Compact & Waterless: Specifically designed for tiny homes and small spaces.
- Odor-Free Operation: A built-in fan continuously vents moisture and odors outside.
- Easy Waste Management: Separate, removable containers for liquids and solids.
- User-Friendly Design: A concealing screen hides solid waste from view.
- Designed in Sweden: High-quality engineering for durability and reliability.
- Sleek & Modern Look: Complements modern interiors without looking out of place.
What We Like
- Extremely compact and space-saving
- Superior odor control with ventilation fan
- Visually appealing and hygienic design
- Simple and clean waste disposal process
- High-quality construction
What We Don't Like
- Requires 12V or 110V power for the fan
- Smaller capacity may require more frequent emptying than larger models
Why We Selected This Product
This model was an easy pick for its brilliant space-saving design and highly effective odor control.
During our review, the ventilation system proved to be exceptionally good, making it impossible to detect any smells.
We were impressed by the thoughtful details, like the concealing screen that improves the visual appeal and hygiene.
It feels like a normal toilet but offers all the benefits of a waterless, composting system.
It's a premium product that delivers on its promises of comfort, cleanliness, and compactness.
User Experience
Users are overwhelmingly positive about the Separett Tiny, frequently calling it a game-changer for small-space living.
The complete absence of odor is the most common point of praise.
People also love its small size and modern look, which fits well with contemporary tiny house interiors.
The ease of emptying both the urine container and the solids bag is another highlight, with many noting how clean and simple the process is.
It's often described as the perfect blend of form and function.
TROBOLO WandaGO Portable Composting Toilet
Your Go-Anywhere Comfort Station
The TROBOLO WandaGO is engineered for maximum mobility without sacrificing comfort.
Weighing just 10.4 lbs, this composting toilet is incredibly lightweight and compact, making it the ideal choice for camping, van life, and any outdoor adventure.
Its standout feature is the adjustable seat height, which can be set to a standard 17.2 inches or a lower 12 inches, providing ergonomic comfort for all users.
The innovative TROBOLO SafeShell System ensures that the toilet is completely odorless and spill-proof, even on bumpy roads.
It operates without any chemicals, water, or electricity, offering true off-grid freedom.
With a capacity of 8-12 uses for solids and 10-20 for liquids, it's efficient for its size.
This toilet is for the adventurer who needs a reliable, comfortable, and truly portable sanitation solution.
Product Specs
| Weight | 10.4 lbs |
| Weight Capacity | 330.7 lbs |
| Adjustable Height | 12.0" or 17.2" |
| Solids Capacity | 8-12 Uses |
| Liquids Capacity | 10-20 Uses |
Features
- Compact & Lightweight: Weighs only 10.4 lbs for ultimate portability.
- Adjustable Seat Height: Can be set to two different heights for ergonomic comfort.
- Odorless & Spill-Proof: The TROBOLO SafeShell System prevents smells and leaks.
- Travel-Ready: Features a firmly closing lid and fastening system for security on the move.
- Efficient Capacity: Supports 8-12 solid uses and 10-20 liquid uses before emptying.
- Easy & Hygienic: Simple to clean with a dedicated holder for the urine diverter.
What We Like
- Extremely lightweight and portable
- Adjustable height for customized comfort
- Completely spill-proof and odorless
- Durable and weather-resistant construction
- Requires no water, chemicals, or electricity
What We Don't Like
- Lower capacity than stationary models
- May feel small for larger individuals
Why We Selected This Product
We selected the WandaGO for being the best-in-class portable option.
Its combination of light weight, adjustable height, and a truly spill-proof design is unmatched.
During our testing, the secure-closing lid and SafeShell system were impressive, providing confidence that there would be no leaks during transit.
The ergonomic seat and optional height adjustment make it far more comfortable than typical camping toilets.
It’s a thoughtfully designed product that solves the real-world problems of sanitation on the move.
User Experience
Users rave about the WandaGO's portability and sturdiness.
Many are surprised by how comfortable it is for a portable unit, often comparing it to a residential toilet.
The spill-proof and odor-free claims hold true, according to widespread feedback, which is a major relief for people using it inside a van or tent.
The ease of emptying and cleaning is another common point of praise.
It's frequently recommended as the perfect, hassle-free toilet for weekend trips and extended travels alike.
Thinktank Composting Toilet
Revolutionary Cleanliness and Comfort
The Thinktank Composting Toilet addresses several common complaints with existing designs, focusing on ease of use and cleanliness.
Its most innovative feature is the elimination of a traditional bowl; waste goes directly into a compostable bag, meaning there is nothing to get messy and require scrubbing.
This makes it incredibly easy to clean.
Another significant advantage is its design, which comfortably allows men to stand while using it.
The unit is completely airtight, with separate intake and exhaust pipes, preventing any loss of heated or cooled air from your tiny home and ensuring no odors escape.
Furthermore, it simplifies the composting process by removing the need to add peat moss or turn a handle.
This toilet is for those who prioritize hygiene, simplicity, and a mess-free experience above all else.
Product Specs
| Cleaning Method | Bag Liner System |
| Ventilation | Airtight with separate pipes |
| Special Feature | Stand-up use capability |
| Agitation | None required |
| Material | Durable Plastic |
Features
- Easy to Clean: No bowl means no mess; waste is contained in a compostable bag.
- Airtight Design: Separate air intake and exhaust prevents air loss and odor escape.
- Allows Standing Use: Thoughtfully designed for male comfort and convenience.
- Simplified Process: No need to add bulking material or turn a crank.
- Hygienic Waste Management: Bag system makes disposal quick and clean.
What We Like
- Exceptionally easy to clean
- Completely airtight and odorless
- Allows men to stand
- Very simple to use and maintain
- No manual agitation required
What We Don't Like
- Requires ongoing purchase of compostable bags
- Aesthetics may be too utilitarian for some
Why We Selected This Product
We chose the Thinktank for its clever, problem-solving design.
The bag-based system is a brilliant solution for those who dislike cleaning traditional composting toilets.
In our evaluation, the airtight construction was highly effective at containing odors and preserving indoor climate control.
The ability for men to stand is a thoughtful, practical feature often overlooked in this market.
It streamlines the entire process, from use to disposal, making it one of the most user-friendly options available.
User Experience
Users are extremely impressed with the cleanliness of the Thinktank system.
The no-mess design is the most celebrated feature, with many stating it completely eliminates the 'yuck factor' of composting toilets.
The ease of emptying—simply tying up the bag—is seen as a major benefit.
The airtight seal is also confirmed by users to be very effective, keeping the bathroom fresh and the home's air contained.
It is often described as the simplest and cleanest composting toilet on the market.
Modiwell Dry Flush Toilet
The Future of Waterless Toilets
The Modiwell Dry Flush Toilet offers a high-tech alternative to composting, focusing on ultimate convenience and hygiene.
Instead of composting, this toilet uses a unique system where, with the press of a button, it automatically seals waste into an odor-proof, leak-proof bag.
This Automatic Thermal Waste Disposal Technology eliminates the need for cleaning, water, or handling compost.
Its built-in 5200mAh rechargeable battery provides power for 70-100 flushes on a single charge, making it perfect for RVs, vans, and off-grid homes.
The system includes coagulant pouches that solidify liquid waste, further ensuring a mess-free experience.
With a sturdy build supporting up to 350 lbs and a compact design, the Modiwell is for those who want a completely hands-off, modern, and portable sanitation system.
Product Specs
| Technology | Dry Flush, Thermal Sealing |
| Battery | 5200mAh Rechargeable |
| Uses Per Charge | 70-100 |
| Weight Capacity | 350 lbs |
| Weight | 17 lbs |
Features
- One-click Flushing: Automatically seals waste in an odor-proof bag.
- 100% Odor-Free: Rigorously tested bags and coagulant prevent all smells and leaks.
- Rechargeable Convenience: Built-in battery lasts for 70-100 uses per charge.
- Sturdy & Durable: Supports up to 350 lbs with stainless steel legs.
- Compact & Portable: Lightweight design is easy to carry and fits in small spaces.
- Waterless Operation: Requires no plumbing, water, or septic system.
What We Like
- Extremely convenient and easy to use
- Absolutely no cleaning required
- Completely odorless and hygienic
- Portable with a long-lasting rechargeable battery
- Strong and stable construction
What We Don't Like
- Requires proprietary refill cartridges/bags, an ongoing cost
- Waste is sent to landfill rather than composted
Why We Selected This Product
We selected the Modiwell because it represents a different, innovative approach to waterless toilets.
It's ideal for users who are not interested in the composting process itself.
During our review, the one-click flushing and sealing mechanism worked flawlessly, creating a truly odorless and hygienic experience.
The convenience is undeniable.
Its rechargeable battery adds to its portability and off-grid utility.
It’s a smarter, more modern solution for people who value ease of use over the agricultural benefits of compost.
User Experience
Users are amazed by the simplicity and effectiveness of the Modiwell.
The 'flush and forget' feature is a huge hit, completely removing the most unpleasant aspects of toilet maintenance.
The system is reported to be 100% odor-free, thanks to the excellent sealing bags.
Its portability and long battery life make it a favorite among RV and van owners.
Many users who have tried composting toilets in the past describe this as a major upgrade in terms of convenience and cleanliness, calling it a true game-changer.
Urine Separator for Dry Toilets
Essential Component for Custom Builds
This Urine Separator is a fundamental component for anyone embarking on a DIY dry toilet project.
Its sole purpose is to efficiently divert urine away from solid waste, which is the single most important step in creating an odor-free composting toilet.
Made with a space-saving design, it is compact enough to fit into most custom-built toilet enclosures without demanding extra room.
The universal compatibility makes it suitable for a wide range of applications, including tiny houses, campers, and off-grid cabins.
Its two-part modular design allows for easy assembly and a secure connection, while the 23 mm outlet ensures urine flows freely without clogging.
This separator is the perfect, budget-friendly starting point for a customized, hygienic, and effective sanitation solution.
Product Specs
| Product Type | Urine Separator/Diverter |
| Outlet Diameter | 23 mm |
| Dimensions | 376 x 320 x 170 mm |
| Assembly | Two-part modular design |
| Application | DIY Dry and Composting Toilets |
Features
- Space-Saving Design: Compact dimensions fit easily into custom toilets.
- Universal Compatibility: Works with a variety of DIY dry toilet setups.
- Modular & Easy Assembly: Two-part design for simple installation.
- Optimized Drainage: 23 mm outlet prevents clogging and ensures efficient flow.
- Customizable Installation: Flat rear section allows for flexible mounting.
- Hygienic Separation: The key to an odor-free and efficient composting system.
What We Like
- Extremely cost-effective
- Enables fully customized toilet builds
- Efficiently separates urine to eliminate odor
- Easy to install and clean
- Durable and well-designed for its purpose
What We Don't Like
- Is only one component, not a full toilet
- Requires significant DIY work to create a complete system
- Does not include plumbing or collection containers
Why We Selected This Product
We chose this urine separator as the best budget component because it provides the most critical function of a composting toilet at a fraction of the cost of a full unit.
It’s a high-impact product for DIYers.
In our assessment, its shape and drainage outlet are well-designed for efficient separation and flow.
The modular design simplifies installation into a custom-built box.
For anyone on a tight budget or with specific design constraints, this product provides the key to building a successful and affordable dry toilet.
User Experience
DIY enthusiasts praise this separator for its simplicity and effectiveness.
Users report that it fits well into their custom designs and performs its job of diverting urine perfectly, leading to an odor-free toilet.
The ease of installation and cleaning are frequently noted.
Many appreciate that it allows them to build a high-functioning composting toilet for a very low cost.
It is often described as a must-have item for anyone building their own dry toilet from scratch, delivering professional results on a DIY budget.
What to Look for Before Buying the Best Composting Toilets For Tiny Houses
Choosing the right composting toilet is more than just a purchase; it’s an investment in your tiny house lifestyle. A well-chosen model can provide years of odorless, eco-friendly, and low-maintenance service, while the wrong one can be a constant source of frustration. This guide will walk you through the essential factors to consider to ensure you make the best possible choice.
Find Your Need - Compatibility and use case considerations
Before you start looking at models, first assess your specific situation. How many people will be using the toilet full-time? A solo dweller has different capacity needs than a family of four. Consider your space constraints. Measure the area where the toilet will go to ensure a proper fit. Also, think about your power availability. Many top-tier models use a 12V fan for ventilation, which is perfect for an off-grid solar setup, but you need to account for that minimal power draw. Finally, consider your lifestyle. Are you stationary, or will you be moving frequently? A portable option like the TROBOLO WandaGO is better for van life, while a larger, stationary unit like the Nature’s Head is ideal for a permanent tiny home.
Budget - Setting realistic price expectations ($50-$1500 ranges)
Composting toilets come in a wide range of prices. On the low end, you can find DIY components like urine separators for under $100, allowing you to build your own system for a few hundred dollars. Mid-range options, which include many excellent and reliable models, typically fall between $600 and $1,000. High-end models with advanced features like electric agitation or self-sealing mechanisms can cost $1,500 or more. Set a realistic budget, but remember that this is a critical piece of infrastructure for your home. Investing in a quality, reliable model can save you a lot of hassle and potential costs down the line.
Key Features - Most important technical specifications
Focus on the features that matter most for functionality and convenience:
- Urine Diversion: This is the most critical feature for an odor-free experience. A good system effectively separates liquids from solids.
- Ventilation: A built-in fan that vents air to the outside is essential for removing moisture and any potential odors.
- Capacity: Check the specifications for both the solids bin and the liquids container. A larger capacity means less frequent emptying.
- Agitation: Solids need to be mixed with a bulking medium (like coconut coir or peat moss) to aid composting. This can be done with a manual crank handle or an automated electric agitator.
- Ease of Emptying: Look for designs with removable, easy-to-handle containers for both liquids and solids. Systems that use compostable bags can make the process even cleaner.
Quality & Durability - What to look for in construction
Your composting toilet will see daily use, so it needs to be built to last. Look for models made from high-quality, durable materials like heavy-duty polyethylene (PE) or ABS plastic, with stainless steel hardware. These materials are resistant to stains, odors, and cracking. Check user reviews and look for information on the product’s warranty. A long warranty, like the 5-year warranty on the Nature’s Head, is a strong indicator of the manufacturer’s confidence in their product’s durability.
Brand Reputation - Importance of established manufacturers
While innovative new companies are always emerging, there’s a lot of value in choosing a brand with a long-standing reputation for quality and customer service. Brands like Nature’s Head and Separett have been in the business for years and have a proven track record of creating reliable products. They also typically offer better customer support, readily available spare parts, and extensive documentation, which can be invaluable if you run into any issues.
Portability/Size - Considerations for space and storage
In a tiny house, every square inch matters. Pay close attention to the dimensions of any toilet you’re considering. Compact models like the Separett Tiny are specifically designed for tight spaces. If you plan to travel, weight and a secure, spill-proof design become paramount. A lightweight, portable toilet with features like a locking lid is a must for RVs and vans.
Is it A Wise Decision to Buy composting toilets for tiny houses?
Absolutely. Investing in one of the best composting toilets for tiny houses is one of the most practical and philosophically aligned decisions you can make for this lifestyle. Unlike traditional toilets that require extensive plumbing, a septic system or sewer connection, and use vast amounts of fresh water, composting toilets are self-contained, waterless systems. This independence is the very essence of off-grid living, freeing you from reliance on municipal infrastructure.
Financially, the upfront cost of a composting toilet can seem high compared to a standard toilet. However, when you factor in the cost of installing a septic system (which can run into tens of thousands of dollars) or ongoing sewer bills, the composting toilet quickly becomes the more economical choice. It also significantly reduces your water consumption, which can lead to lower utility bills or less strain on your off-grid water storage system.
Beyond the practical benefits, choosing a composting toilet is a powerful environmental statement. It transforms human waste from a pollutant into a valuable resource—compost—that can be used to enrich soil. This closed-loop system reduces your environmental footprint, conserves water, and prevents the pollution associated with wastewater treatment. It’s a choice that reflects a commitment to sustainability and self-sufficiency, making it a wise and rewarding investment for any tiny house owner.
What Is the Best Way to Choose composting toilets for tiny houses?
Choosing the perfect composting toilet involves a methodical approach to match a product to your specific needs. Here’s a step-by-step guide to help you make the best choice.
Assess Your Space and Lifestyle: Start by measuring the exact footprint available in your bathroom. Consider vertical space as well. Next, determine your usage pattern. Will it be used by one person part-time, or a family full-time? This will dictate the capacity you need. If you’re in a van or RV, prioritize portability and a spill-proof design.
Define Your Maintenance Tolerance: Be honest with yourself about how much maintenance you’re willing to do. Do you prefer a larger unit that needs emptying less frequently, like the Nature’s Head? Or would you rather have a system with compostable bags, like the Thinktank, for super-easy, albeit more frequent, disposal? Do you mind a manual crank, or is an automatic agitator like the OGO’s worth the extra cost?
Set Your Budget: Determine your price range, considering the total cost of ownership. This includes the initial purchase price plus any ongoing costs for consumables like compostable bags or bulking agents. While it’s tempting to go for the cheapest option, especially a DIY route, a well-made unit often provides a better, more pleasant experience in the long run.
Research Key Features and Reviews: Zero in on the non-negotiable features for you. For most, this will be effective urine diversion and a ventilation fan for an odor-free experience. Read detailed reviews and watch video demonstrations to understand how each toilet operates in the real world, especially regarding the emptying process.
Consider the End Product: What do you plan to do with the compost? If you have a garden, a true composting toilet that produces usable humus is a great choice. If you are not interested in handling compost and simply want a convenient, waterless option, a dry-flush system like the Modiwell might be a better fit, even though its waste goes to a landfill. This is a crucial consideration when looking for a sustainable water system for your well water or other home essentials.
Common Mistakes to Avoid:
- Ignoring Ventilation: The biggest mistake is underestimating the importance of a vent fan. It is the key to a 100% odor-free bathroom.
- Buying Too Small: Choosing a toilet with insufficient capacity for your needs will lead to constant, frustrating maintenance.
- Forgetting Power Needs: If your chosen model has a fan or electric agitator, ensure you have a reliable 12V power source available at the installation site.
FAQ
What is the best composting toilets for tiny houses for beginners?
For beginners, the OGO Electric Mixing Compost Toilet is an excellent choice. Its automated features, like the electric agitator and urine level sensor, simplify the process and reduce the learning curve. The clear instructions and easy-to-manage separate containers make maintenance less intimidating, providing a user-friendly introduction to composting toilets without compromising on performance or odor control.
How much should I spend on composting toilets for tiny houses?
You can expect to spend between $600 and $1,500 for a high-quality, complete composting toilet system. Models in the $900-$1,200 range, like the Nature’s Head or OGO, offer a great balance of features, durability, and capacity. While budget DIY options exist for under $300, investing in a well-engineered unit often proves more reliable and pleasant to use long-term.
What features are most important in composting toilets for tiny houses?
The two most critical features are an efficient urine-diverting system and active ventilation (usually a small 12V fan). Urine diversion is the key to preventing foul odors, as mixing liquids and solids creates sewage smell. The ventilation fan pulls moisture and any remaining odors out of the unit and vents them outside, ensuring your small space stays completely fresh.
How do I maintain my composting toilets for tiny houses?
Maintenance involves three main tasks. First, regularly add a carbon-based bulking medium like coconut coir or peat moss after each solid use. Second, empty the urine container every few days. Third, empty the solids bin when it’s full, which can be anywhere from every few weeks to every few months, depending on the model and usage. The composted material should then be disposed of according to local regulations, often by burying it or adding it to a secondary compost pile.
Are expensive composting toilets for tiny houses worth it?
In many cases, yes. More expensive models often justify their cost with superior build quality, more effective odor control systems, larger capacities, and convenience features like automatic agitation. Investing in a premium, well-designed toilet can significantly improve your daily quality of life in a tiny space, making it a worthwhile long-term investment in comfort and hygiene.
What brands make the best composting toilets for tiny houses?
Several brands are highly regarded in the tiny house community. Nature’s Head is famous for its rugged durability and large capacity. OGO is known for its modern design and smart, automated features. Separett is praised for its compact, efficient, and aesthetically pleasing Swedish designs. These brands consistently deliver reliable, odor-free performance.
How long do composting toilets for tiny houses typically last?
A well-made composting toilet from a reputable brand should last for many years, often a decade or more. They are typically constructed from very durable materials like polyethylene and stainless steel with few moving parts. With proper care and occasional replacement of minor parts like fan motors or seals, you can expect your composting toilet to be a long-lasting part of your tiny home.
Can I find good composting toilets for tiny houses on a budget?
Yes, but it usually involves a DIY approach. You can purchase a high-quality Urine Separator component for under $100 and build your own toilet enclosure. This allows you to create a very effective, odor-free system for a fraction of the cost of a pre-built unit. However, it requires some basic carpentry skills and effort to assemble the complete system.
Final Verdict
After extensive research and comparison, our top recommendation for the Best Composting Toilets For Tiny Houses is the OGO Electric Mixing Compost Toilet. It strikes the perfect balance between modern convenience and rugged off-grid functionality. Its automatic agitator, smart urine sensor, and completely odorless operation make it the most user-friendly and effective solution for most tiny house dwellers.
For those on a tighter budget who don’t mind a bit of hands-on work, the TROBOLO WandaGO Portable Composting Toilet offers incredible value with its portability and spill-proof design, making it a versatile choice.
If you are seeking the most reliable, time-tested option and prioritize capacity above all else, the Nature’s Head Self-Contained Composting Toilet remains a premium workhorse that will not let you down.
Ultimately, the right choice depends on your specific needs, but you can’t go wrong with any of these top performers. We recommend you review our top picks and select the model that best fits your space, budget, and lifestyle.
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