best on demand hot water heater – Which One Surprised Us Most?
Are you tired of running out of hot water during your showers? A tankless water heater is the efficient solution you need.
A tankless water heater provides hot water on demand, eliminating the need for bulky storage tanks. Top products like the EcoSmart ECO 11 and ORBEK 18kW deliver instant hot water, making them perfect for kitchens and bathrooms. One key benefit is their energy efficiency, which can lead to lower utility bills.
These models stand out with features like digital displays and patented self-modulating technology. They simplify temperature control and supply hot water simultaneously for multiple fixtures. In our full review, we break down performance, durability, and more to help you choose.


Stiebel Eltron Tankless Electric Water Heater
The Tankless Water Heater Electric 110V is designed to provide instant hot water on demand, ideal for homeowners and renters looking to enhance their kitchen and bathroom experiences. Its compact size and sleek design make it perfect for small spaces, such as apartments, RVs, and even camping setups. With a power output of 3000W, this mini water heater can raise water temperatures significantly, delivering hot water quickly without the need for preheating.
This electric tankless water heater features a high-quality ABS material construction and an LED display that shows temperature settings in both Fahrenheit and Celsius. Its dimensions allow for easy installation under sinks, ensuring that you can enjoy hot water for washing dishes or hands without delay. The heater operates at a flow rate of 0.3 GPM to 0.5 GPM, providing efficient heating tailored to your needs.
Pros
- Instant hot water eliminates waiting time.
- Compact design fits well in tight spaces.
- High thermal efficiency (up to 98%) saves energy.
- Multiple safety features prevent overheating and leaks.
- Easy installation with included manual and accessories.
Cons
- Not suitable for shower use due to low flow rates.
- Requires vertical installation only, limiting placement options.
- May require professional installation for optimal performance.
The Tankless Water Heater Electric 110V excels in performance with its rapid heating capabilities and user-friendly features. Its standout safety measures, including dry boil protection and IPX4 waterproof rating, ensure peace of mind during operation. However, potential users should note that this model is not designed for high-demand applications like showers, making it best suited for kitchens and bathrooms where quick access to hot water is needed.
In summary, this on-demand hot water heater is an excellent choice for individuals or families who value convenience and efficiency in their daily routines. With its compact design and robust performance, it is ideal for anyone looking to upgrade their hot water supply without the hassle of traditional tank systems.
To buy this product, click here.
EcoSmart ECO 11 Electric Tankless Water Heater
The EcoSmart ECO 11 Electric Tankless Water Heater is designed to deliver endless on-demand hot water, making it ideal for homeowners, small businesses, and anyone needing consistent hot water without the bulk of a traditional tank. With dimensions of 11.5 x 8 x 3.75 inches, this compact unit is perfect for tight spaces, such as bathrooms, small sinks, and office breakrooms. Its sleek design and energy-efficient features ensure that it meets modern demands for convenience and sustainability.
The EcoSmart ECO 11 utilizes patented self-modulating technology to monitor water temperature and control flow rates, ensuring efficiency and consistent performance within 1 degree of the selected temperature. This tankless water heater is equipped to provide between 1.3 and 3.1 gallons per minute, depending on the inlet water temperature, making it suitable for low-flow applications. It operates at 240 volts with an amperage draw of 54 A, providing reliable service without the need for constant maintenance.
Pros
- Endless hot water: Never run out of hot water, perfect for busy households.
- Space-saving design: 90% smaller than traditional tank heaters, allowing for flexible installation.
- Energy efficient: Heats water only when needed, resulting in significant energy savings.
- Easy installation: Can be mounted on a wall or installed at the point of use, simplifying setup.
Cons
- Limited flow rate: May not meet hot water demands for larger households simultaneously.
- Higher upfront cost: While energy savings are significant, the initial investment may be steep for some users.
The EcoSmart ECO 11 stands out for its performance and efficiency, making it a great choice for individuals who prioritize hot water availability without compromising on space or energy consumption. It’s particularly well-suited for small homes or offices where hot water needs are modest. While it may not be ideal for larger families, its compact size and advanced technology make it a valuable addition to any modern setup.
In summary, the EcoSmart ECO 11 Electric Tankless Water Heater is perfect for those who need a reliable, energy-efficient solution for hot water. Its innovative features and compact design cater to a variety of users, ensuring satisfaction with every use.
To buy this product, click here.
ORBEK 18kW Electric Tankless Water Heater
The ORBEK 18kW Tankless Water Heater Electric is designed to provide an instant supply of hot water, making it ideal for households that require efficient hot water solutions. This product caters to users with moderate to high hot water needs, effectively serving 2-3 fixtures simultaneously. With dimensions of 17″H x 13.0″L x 3.9″W, it is compact enough to fit into tight spaces while delivering powerful performance.
One of the standout features of the ORBEK Tankless Water Heater is its ability to provide up to 4.17 gallons per minute (GPM) of on-demand hot water. This ensures that users can enjoy comfortable showers or running hot water in multiple locations without interruption. The heater utilizes advanced technology to maintain a stable temperature within 1°F, enhancing the overall user experience by preventing sudden temperature fluctuations.
Key specifications include a 240V power requirement, making it suitable for most homes, and an ETL certification that guarantees safety and reliability. The heater also boasts high energy efficiency, potentially reducing electricity costs by up to 60% compared to traditional tank-style heaters. By separating water and electricity, it minimizes scale buildup and corrosion, ensuring longevity.
Pros
- Instant hot water supply with up to 4.17 GPM.
- High energy efficiency, reducing electricity costs significantly.
- Compact design saves space compared to traditional heaters.
- Comprehensive safety features for peace of mind.
- Easy installation process, suitable for most home layouts.
Cons
- Requires specific electrical setup (2 x 240V/40A breakers).
- Initial investment may be higher than traditional water heaters.
- Limited to indoor installation only.
The ORBEK Tankless Water Heater excels in performance and usability, making it an excellent choice for families or individuals who value efficiency and reliability. While it does have specific installation requirements and a higher upfront cost, the long-term savings and convenience it offers are substantial. Overall, this product is well-suited for those seeking a modern solution to their hot water needs.
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Ecosmart 1.8 Gallon Electric Water Heater
The 1.8 Gallon Electric Mini Tank Water Heater is designed to provide instant hot water at your sink, making it ideal for homeowners, restaurants, and hotels. This compact unit is perfect for small spaces, ensuring that you have hot water on demand without the long wait times typically associated with traditional water heaters. Its dimensions allow for easy installation under sinks or counters, and it is available in a sleek design that fits seamlessly into any decor.
Key specifications include a capacity of 1.8 gallons, a power rating of 110V and 1500W, and a temperature adjustment range from 77 ℉ to 176 ℉. The high-density polyvinyl chloride construction enhances durability and performance, ensuring that the heater can withstand regular use while delivering efficient heating.
This mini tank water heater effectively solves the problem of waiting for hot water, significantly reducing water waste and improving user experience. With its adjustable thermostat, users can set their desired temperature, ensuring maximum comfort and energy savings.
Pros
- Instant hot water delivery reduces wait times and water waste.
- Energy-efficient design with adjustable temperature settings.
- Compact size allows for versatile installation options.
- Durable materials ensure long-lasting performance.
Cons
- Limited capacity may not suffice for larger households.
- Requires professional installation to avoid errors.
The 1.8 Gallon Electric Mini Tank Water Heater excels in performance with its ability to provide reliable hot water in various scenarios, from residential to commercial use. Its standout features include the quick heating capability and energy-efficient operation, making it a practical choice for anyone needing a consistent hot water supply. While it is best suited for smaller spaces or lower demand situations, its ease of use and safety features make it a valuable addition to any home or business.
In summary, this mini tank water heater is ideal for users seeking efficient and reliable hot water solutions. Its compact design and performance make it a worthy investment for those looking to enhance their hot water availability.
To buy this product, click here.
Stiebel Eltron 3000W Tankless Water Heater
Tankless Water Heater Electric 110V is designed to provide instant hot water, ideal for homeowners and renters looking for a compact solution for their kitchens and bathrooms. With a power output of 3000W, this mini water heater efficiently raises water temperatures by up to 82°F (28°C) in just 3-5 seconds. Its small size and wall-mounted design make it perfect for tight spaces, ensuring you never have to wait long for hot water again.
This electric tankless water heater features an LED display for easy temperature monitoring and allows users to set temperatures in Fahrenheit or Celsius. It addresses the common problem of waiting for hot water, making it an excellent choice for quick tasks like washing dishes or hands. The Tankless Water Heater Electric 110V is especially beneficial for apartments, RVs, and camping, where space is limited.
Pros
- Instant hot water: Eliminates long waiting times.
- Compact design: Fits perfectly under sinks, saving space.
- Multiple safety features: Includes IPX4 waterproofing and dry-burning protection.
- Easy installation: Comes with pre-made screw holes and a user-friendly manual.
- Versatile application: Suitable for kitchens, bathrooms, and even RVs.
Cons
- Requires specific wiring: Needs a cross-sectional area of ≥ 2.5 square millimeters.
- Limited flow rate: Performance may vary based on water flow.
Performance-wise, the Tankless Water Heater Electric 110V stands out for its rapid heating capabilities and safety features, making it a reliable choice for daily use. It is best suited for individuals or families who need a consistent source of hot water without the bulk of traditional water heaters. However, users should be mindful of the installation requirements and ensure proper setup to avoid any malfunctions.
In summary, the Tankless Water Heater Electric 110V is an excellent investment for anyone seeking convenience and efficiency in their hot water supply. Its compact design and advanced features cater to a variety of needs, making it an ideal choice for modern living spaces.
To buy this product, click here.
Faq about best on demand hot water heater:
1:What is an on demand hot water heater?
An on demand hot water heater, also known as a tankless water heater, heats water directly without the use of a storage tank, providing hot water only as needed.
2:What are the benefits of using an on demand hot water heater?
Benefits include energy efficiency, endless hot water supply, space savings, and lower utility bills compared to traditional tank heaters.
3:How do I choose the best on demand hot water heater?
Consider factors such as flow rate, energy efficiency ratings, fuel type, and the size of your household to determine the best model for your needs.
4:Are on demand hot water heaters more expensive?
While the initial cost is higher than traditional heaters, the long-term savings in energy bills often offset the upfront investment.
5:How long do on demand hot water heaters last?
Typically, on demand hot water heaters last 15 to 20 years with proper maintenance, which is longer than conventional tank water heaters.
6:Can I install an on demand hot water heater myself?
While some homeowners may attempt DIY installation, hiring a professional plumber is recommended to ensure safety and compliance with local codes.
Conclusion
Stiebel Eltron Tankless Electric Water Heater exemplifies efficiency and innovation, offering instantaneous hot water with minimal energy consumption, making it an exemplary choice for eco-conscious consumers. Its compact design and advanced technology ensure reliability and performance, catering to modern demands.
Conversely, the EcoSmart ECO 11 Electric Tankless Water Heater stands out for its affordability and user-friendly installation, providing consistent hot water while significantly reducing utility bills. Both products reflect a commitment to sustainability and convenience, making them ideal selections for those seeking optimal performance in water heating solutions.





