Tiny houses demand efficient use of space and resources. Tankless water heaters offer compact solutions perfect for limited areas.
Choosing the right tankless water heater for your tiny house can be daunting. Space and energy efficiency are top priorities. This post explores the best tankless water heaters that cater to the unique needs of tiny homes. These heaters provide hot water on demand without occupying much space.
Rheem, EcoSmart, and CAMPLUX offer models that are ideal for various setups. Whether you need an electric heater for indoor use or a propane heater for outdoor camping, there’s a suitable option. Discover the benefits and key features of these models, ensuring you make an informed decision for comfortable living in your tiny house.
Rheem 18kw 240v Tankless Electric Water Heater

The Rheem 18kW 240V Tankless Electric Water Heater is an ideal choice for homeowners looking to upgrade their water heating system with a modern, energy-efficient solution. If you’re someone who values constant hot water availability and wants to reduce energy consumption, this product is designed for you. It is also well-suited for smaller households or spaces where a compact water heating solution is required.
Pros:
- Energy-efficient design reduces power consumption.
- Provides endless hot water on demand.
- Compact size saves space.
- Modern gray finish blends with contemporary decor.
Cons:
- May not be suitable for large households with high hot water demand.
- Professional installation might be required.
The Rheem 18kW 240V Tankless Electric Water Heater boasts a sleek and compact design, making it easy to install in tight spaces. This feature is particularly beneficial for homeowners who lack the room for a traditional water heater. Its gray finish not only adds a modern touch to any home but also ensures it complements various interior styles. By eliminating the need for a bulky tank, this unit can be discreetly placed, optimizing your living space without compromising on performance.
One of the standout features of this water heater is its energy efficiency. The tankless design ensures that water is heated only when needed, drastically reducing the energy wastage associated with traditional water heaters that constantly maintain water temperature. This not only translates to lower energy bills but also a reduced carbon footprint, making it an environmentally friendly choice. Additionally, the continuous hot water supply ensures that you never run out of hot water, providing convenience and comfort for daily routines.
Ecosmart Eco 11 Electric Tankless Water Heater

The EcoSmart ECO 11 Electric Tankless Water Heater is an ideal choice for environmentally conscious homeowners seeking an energy-efficient solution for their hot water needs. This product is perfect for those who want to save space and reduce their energy bills, while still enjoying the convenience of on-demand hot water. Whether you’re living in a small apartment or a cozy home, this compact water heater meets your demands without compromising performance.
Pros:
- Energy-efficient with patented self-modulating technology.
- Compact design saves space, ideal for small homes.
- Provides on-demand hot water, reducing water waste.
Cons:
- Installation may require professional assistance.
- Limited output may not be suitable for large households.
The EcoSmart ECO 11 is equipped with patented self-modulating technology, which ensures that the water heater only uses the necessary amount of energy to heat water, thereby maximizing efficiency and minimizing waste. This feature not only lowers your energy bills but also contributes to a greener environment, making it an excellent choice for eco-conscious individuals.
Another notable feature of this water heater is its compact design. Measuring just 11.5 inches in height and weighing 6.5 pounds, the ECO 11 fits conveniently in tight spaces, freeing up valuable room in your home. Its sleek, white exterior blends seamlessly with any decor, ensuring that practicality does not come at the cost of style.
Camplux Tankless Water Heater

The CAMPLUX Tankless Water Heater is ideal for those who enjoy outdoor living and need a reliable source of hot water in remote locations. It’s perfect for use in cabins, off-grid setups, tiny houses, and mobile homes. If you’re someone who values energy efficiency and portability, this propane-powered water heater is a great choice.
Pros:
- Tankless design offers endless hot water supply.
- Compact and lightweight, making it easy to install and transport.
- High flow rate of 5.28 GPM ensures sufficient water for multiple uses.
- Energy-efficient, reducing overall propane consumption.
Cons:
- Requires propane which might not be readily available in all areas.
- May require professional installation for optimal performance.
The CAMPLUX Tankless Water Heater features a compact design with dimensions of 27.6 x 17.3 x 17.3 inches and a weight of 31.3 pounds, making it suitable for small spaces and easy to maneuver. Its propane power source allows for flexible placement in off-grid locations, where traditional electric or natural gas connections are unavailable. This makes it a perfect fit for outdoor enthusiasts and those living in remote areas.
With a powerful output of 136,000 BTU, this water heater delivers a high flow rate of 5.28 gallons per minute, ensuring that multiple fixtures can be used simultaneously without a drop in temperature. This makes it an excellent choice for families or groups staying in cabins or mobile homes, as it can handle the demand for showers, dishwashing, and more. Additionally, its energy efficiency helps save on fuel costs, offering a cost-effective solution for long-term use.
Bigger Than Tiny, Smaller Than Average

For those passionate about architecture and design, and intrigued by the concept of tiny homes, “Bigger Than Tiny, Smaller Than Average” is an ideal choice. This book caters to individuals who appreciate compact living spaces that offer the perfect balance between functionality and aesthetic appeal. Whether you are a homeowner looking to optimize space or an architect seeking inspiration, this book will offer valuable insights into designing living environments that are both stylish and efficient.
Pros:
- Comprehensive guide from Gibbs Smith, a reputed manufacturer.
- Offers 224 pages of detailed insights and inspiration.
- Published recently, ensuring up-to-date information.
Cons:
- Its weight might make it less convenient for on-the-go reading.
- Dimensions could be bulky for some readers.
The book “Bigger Than Tiny, Smaller Than Average” explores the innovative design concepts that redefine small living spaces. With a height of 11.0 inches and a length of 8.5 inches, its dimensions offer a substantial physical presence, ensuring that the visuals and diagrams are presented in an engaging manner. This is particularly beneficial for readers who appreciate high-quality imagery and detailed illustrations that complement the text.
One of the standout features of this book is its number of pages—a total of 224—which guarantees a wealth of information and ideas. It serves as a comprehensive resource for those looking to incorporate elements of sustainability and efficiency into their homes. The publication date of March 29, 2022, ensures that the content is current and reflective of modern trends in home design, offering readers insights into the latest innovations in the field.
Camplux Outdoor Tankless Water Heater Propane

The CAMPLUX Outdoor Tankless Water Heater is the perfect solution for outdoor enthusiasts and those living in remote or mobile settings. Ideal customers include campers, owners of remote cabins, tiny house dwellers, and mobile home residents who need a reliable and efficient hot water solution. This product is designed for individuals who value portability and ease of use without compromising on performance.
Pros:
- High efficiency with a flow rate of 4.22 GPM.
- Compact and portable design, suitable for outdoor use.
- Energy-efficient with a rating of 110,000 BTU.
- Easy installation and setup.
Cons:
- Requires propane fuel, which might not be readily available everywhere.
- Not suitable for indoor installation.
The CAMPLUX Outdoor Tankless Water Heater offers impressive features that significantly enhance user experience. With a remarkable flow rate of 4.22 GPM, it ensures a steady supply of hot water, making it ideal for outdoor showers and washing needs. The compact design allows it to fit easily into limited spaces, making it an excellent choice for tiny houses and mobile homes where space is at a premium.
Another outstanding feature is its energy efficiency, boasting a 110,000 BTU output. This not only minimizes fuel consumption but also reduces environmental impact, offering a sustainable solution for those who are conscious of their ecological footprint. Its easy installation process means users can set it up quickly and start enjoying hot water in no time, making it a convenient option for those who frequently move locations or for impromptu camping trips.
Tankless Water Heater Electric 110v

The Tankless Water Heater Electric 110V, 3000W Instant Water Heater is perfect for homeowners and apartment dwellers who are looking for an efficient way to get on-demand hot water without the need for a large storage tank. It’s ideal for those with limited space or for anyone who wants to save on their energy bills by heating water only when needed. If you’re someone who values both convenience and efficiency, this compact electric mini water heater is an excellent choice for your kitchen or bathroom.
Pros:
- Compact Size: Fits easily under sinks, saving space.
- Energy Efficient: Heats water on demand, reducing electricity usage.
- Digital Display: Allows for easy temperature monitoring and adjustment.
- Quick Installation: Simple setup process.
Cons:
- Limited Output: May not be suitable for larger households with high hot water demand.
- Specific Voltage Requirement: Requires a 110V power supply, which may not be available in all locations.
The Tankless Water Heater Electric 110V, 3000W boasts a compact design, making it a perfect fit for small spaces such as under the sink. Its small dimensions of 7.87 inches in height and 4.33 inches in width and length ensure that it can be installed without taking up much room. This feature is especially beneficial for those who want to maximize their available space without compromising on functionality.
With its 3000W power, this instant water heater provides on-demand hot water, eliminating the need for a bulky storage tank. This not only frees up valuable space but also ensures that you only heat water when necessary, which can lead to significant energy savings. The digital display allows users to easily monitor and adjust the water temperature, providing a customizable experience that caters to individual preferences.
Camplux 1.32 Gpm Portable Outdoor Tankless Water Heater

The CAMPLUX 1.32 GPM Portable Outdoor Tankless Water Heater is perfect for outdoor enthusiasts and campers who enjoy a comfortable hot shower in the wilderness. If you love camping, hiking, or spending time in nature but can’t compromise on comfort, this portable water heater is designed for you. It’s an ideal solution for those who need hot water on-demand without the constraints of traditional water heating systems.
Pros:
- Portable and easy to carry with a freestanding stand and carry bag.
- Provides instant hot water, allowing for a comfortable shower experience outdoors.
- Easy to install and use, with straightforward controls and setup.
- Energy-efficient operation using propane, making it cost-effective for frequent use.
Cons:
- Requires propane, which means you need to carry fuel along on trips.
- Limited water flow at 1.32 GPM, which might not be sufficient for simultaneous multiple uses.
- Weight at over 22 pounds can be cumbersome for long hiking trips without vehicle access.
The CAMPLUX 1.32 GPM Portable Outdoor Tankless Water Heater offers a range of features tailored to enhance the outdoor experience. Its lightweight and compact design allows for easy transport, making it a valuable addition to any camper’s gear. The inclusion of a freestanding stand and carry bag further simplifies portability, ensuring that you can set up your shower almost anywhere. The heater is designed to deliver instant hot water, which is a significant advantage when camping in remote areas where traditional water heating options are unavailable.
In terms of operation, the propane-powered system is both energy-efficient and cost-effective, providing a sustainable option for frequent campers. The straightforward installation and controls mean that even those unfamiliar with portable heaters can quickly get it running. However, while it offers a convenient shower solution, users should be mindful of the propane requirement and the limited water flow rate of 1.32 GPM, as these factors can influence the overall usability depending on the camping scenario.
Frequently Asked Questions
What Are The Benefits Of Tankless Water Heaters?
Tankless water heaters provide on-demand hot water, saving energy and space. They are perfect for tiny houses due to their compact design. These heaters can reduce water heating costs by up to 50%. They also have a longer lifespan compared to traditional water heaters.
How Does Rheem 18kw Ensure Efficiency?
Rheem 18kW uses advanced self-modulating technology, adjusting power based on demand. It offers continuous hot water without waiting. The digital temperature control provides precision, enhancing energy efficiency. This feature makes it ideal for small spaces and energy-conscious homeowners.
Is Ecosmart Eco 11 Suitable For Small Spaces?
Yes, EcoSmart ECO 11 is designed for small spaces. Its compact size makes installation easy in tight areas. The self-modulating technology adjusts energy consumption to meet hot water needs. It’s perfect for tiny homes, conserving both space and energy.
Why Choose Camplux For Off-grid Living?
CAMPLUX water heaters are ideal for off-grid living. They offer portability and propane power, perfect for remote locations. The models are designed for outdoor use, ensuring reliable hot water. These features make CAMPLUX a great choice for off-grid cabins and tiny houses.
Are Electric Or Propane Heaters Better For Tiny Homes?
Electric heaters are compact and easy to install, great for tiny homes. They offer precise temperature control and energy efficiency. Propane heaters provide flexibility for off-grid living, ensuring hot water availability even in remote areas. The choice depends on your energy needs and living situation.
Conclusion
Choosing the right tankless water heater for a tiny house is crucial. Compact spaces demand efficient solutions. Rheem’s 18kw model offers consistent performance for small homes. The ecosmart eco 11 adjusts energy use automatically, saving money. For those who prefer propane, the camplux options are versatile.
They suit outdoor settings and remote cabins, delivering reliable hot water. The 5. 28 gpm version is particularly robust, while the 4. 22 gpm model is a solid choice for mobile living. Smaller needs can be met with the 1.
32 gpm portable heater, perfect for camping. Finally, the 110v electric heater is ideal for under-sink installations. It’s a smart pick for bathroom or kitchen use. Each model has unique benefits, catering to different lifestyles. Consider your space, energy source, and budget.
With careful selection, your tiny house will enjoy efficient, uninterrupted hot water. Choose wisely for comfort and convenience.