Radiant Tankless Water Heater – Are You Missing Out on These Top Picks?
Are you tired of running out of hot water during showers? A tankless water heater can provide endless hot water solutions.
A tankless water heater delivers hot water on demand, eliminating the need for bulky storage tanks. Products like the Rinnai RX199iN and ECOTINYMACH 110V offer efficient heating solutions, ensuring you never run out of hot water when you need it most.
Standout features include the Rinnai RX199iN’s impressive 11.1 GPM flow rate, perfect for large households, and the ECOTINYMACH 5000W‘s compact design, which simplifies installation in tight spaces. Both products provide energy efficiency, saving you money on utility bills.
In our full review, we break down performance, durability, and more to help you choose the best tankless water heater for your needs.


Rinnai RX199iN Tankless Water Heater
The Rinnai RX199iN Condensing Smart Sense Tankless Water Heater is designed to provide an endless supply of hot water, making it ideal for homeowners seeking efficiency and convenience. This model caters to both natural gas and propane users, offering flexibility in installation—indoors or outdoors. With dimensions comparable to a small suitcase, it can deliver up to 11.1 gallons per minute (GPM), accommodating multiple fixtures simultaneously.
Key specifications include a powerful 199,000 BTU output, a sleek modern design, and a high energy efficiency factor with a UEF of .98. This compact unit not only saves space but also enhances your home’s energy efficiency, significantly reducing utility bills.
The Rinnai RX199iN addresses the common problem of running out of hot water during peak usage times. Its innovative Smart Sense gas control system ensures optimal performance, enhancing the user’s experience by providing consistent hot water on demand.
Pros
- Endless hot water supply, ideal for large families or simultaneous use.
- Compact design saves space compared to traditional water heaters.
- High energy efficiency reduces utility costs.
- Versatile installation options for indoor or outdoor use.
- Smart control features enhance usability and monitoring.
Cons
- Professional installation is recommended, adding to overall costs.
- WiFi control module sold separately; additional investment needed.
- Initial price may be higher compared to conventional water heaters.
The Rinnai RX199iN excels in performance with its quick-flush feature, making maintenance straightforward. It suits homeowners who prioritize efficiency and are willing to invest in quality. While the need for professional installation and the separate purchase of WiFi control may deter some, the benefits it offers far outweigh these minor drawbacks.
In summary, the Rinnai RX199iN Condensing Smart Sense Tankless Water Heater is perfect for those wanting reliable, efficient hot water solutions. Its combination of high output and energy efficiency makes it a valuable addition to any home.
To buy this product, click here.
ECOTINYMACH 110V Tankless Electric Water Heater
The ECOTINYMACH 110V Tankless Water Heater Electric is designed to provide instant hot water, ideal for homeowners seeking a compact and efficient solution for under-sink applications. Its sleek design and powerful 3000W output make it perfect for small kitchens, bathrooms, or utility rooms where space is at a premium. With dimensions that allow it to fit snugly in tight spaces, this water heater offers both functionality and convenience.
This tankless water heater features a unique convertible temperature scale, allowing users to switch between Fahrenheit and Celsius. This adaptability ensures that you can monitor and adjust the water temperature according to your personal preference, enhancing your overall user experience. The heater’s electric design not only provides hot water on demand but also contributes to energy savings, making it an environmentally friendly option.
Pros
- Compact design saves space while providing efficient hot water.
- Convertible temperature scale enhances usability for different preferences.
- Easy installation process saves time and effort.
- Energy-efficient operation reduces electricity bills.
- Environmentally friendly, contributing to a lower carbon footprint.
Cons
- Requires a dedicated circuit breaker of at least 32AMP.
- Installation may require specific wiring (2.5mm² or 13AWG).
- Output may be limited for larger households with high hot water demand.
In terms of performance, the ECOTINYMACH 110V Tankless Water Heater stands out due to its ability to deliver hot water instantly, eliminating the wait associated with traditional tank heaters. Its compact design makes it particularly suited for apartments or smaller homes where every inch counts. However, potential buyers should consider their specific hot water needs, as this unit may not suffice for larger families or multiple simultaneous uses.
Overall, the ECOTINYMACH 110V Tankless Water Heater is an excellent choice for those seeking a reliable, energy-efficient solution for immediate hot water access. Its combination of compact design, ease of installation, and user-friendly features makes it ideal for individuals or small families looking to enhance their home’s convenience.
To buy this product, click here.
ECOTINYMACH 5000W Tankless Water Heater
The ECOTINYMACH Tankless Water Heater Electric 110V is designed to provide instant hot water, ideal for homeowners seeking convenience and efficiency. This compact unit is perfect for under-sink installations, making it suitable for kitchens, bathrooms, or utility rooms. With a power output of 5000W, it delivers hot water on demand, eliminating the wait associated with traditional water heaters. Its sleek design and neutral color blend seamlessly into any home decor.
This tankless water heater solves the problem of inconsistent hot water availability, ensuring that you have access to hot water whenever you need it. Its ability to operate only when hot water is required helps reduce energy consumption, making it an eco-friendly choice for those looking to lower their electricity bills.
Pros
- Instant hot water eliminates waiting time.
- Energy-saving feature reduces electricity costs.
- Easy operation with remote control.
- Fahrenheit and Celsius conversion for user convenience.
Cons
- Requires professional installation for electrical connections.
- Limited to specific electrical requirements (≥ 60AMP circuit breaker).
The ECOTINYMACH Tankless Water Heater stands out for its performance and efficiency. The remote control feature allows for effortless operation, while the instant hot water capability significantly enhances user experience. This product is best suited for small households or individuals who prioritize convenience and energy savings. However, potential buyers should be aware of the installation requirements, as improper setup can lead to functionality issues.
In summary, the ECOTINYMACH Tankless Water Heater Electric 110V is a valuable addition to any home, particularly for those needing quick access to hot water without the hassle of traditional systems. Its energy-saving capabilities and ease of use make it an excellent choice for modern living.
To buy this product, click here.
EcoSmart ECO 11 Electric Tankless Water Heater
The EcoSmart ECO 11 Electric Tankless Water Heater is designed to provide endless on-demand hot water, making it ideal for homeowners and small businesses seeking efficient and reliable hot water solutions. Its compact dimensions of 11.5 x 8 x 3.75 inches and lightweight design make it perfect for installations in tight spaces, such as bathrooms, small sinks, or office breakrooms. Made from high-quality materials, this unit is built for durability and long-lasting performance.
This tankless water heater effectively addresses the common problem of running out of hot water. Unlike traditional tank heaters that constantly maintain water temperature, the EcoSmart ECO 11 only heats water when needed, ensuring energy efficiency and significant savings on utility bills. With a heating capacity of 13 kilowatts and patented self-modulating technology, it maintains consistent water temperature within 1 degree of the selected setting, providing a reliable hot water supply.
Pros
- Endless hot water supply, eliminating cold showers.
- Compact design saves space compared to traditional tanks.
- 99% thermal energy efficiency reduces energy costs.
- Easy installation on walls or at point of use.
- Durable construction ensures long-term reliability.
Cons
- Requires a significant amperage draw (54 A) for optimal performance.
- May not be suitable for larger households with high hot water demands.
The EcoSmart ECO 11 stands out with its energy-efficient design and compact size, making it an excellent choice for those with limited space or lower hot water needs. It performs exceptionally well in real-world applications, providing between 1.3 and 3.1 gallons-per-minute depending on the inlet water temperature. This feature ensures that users experience consistent hot water flow without fluctuations.
Overall, the EcoSmart ECO 11 Electric Tankless Water Heater is best suited for individuals or small families who prioritize energy savings and space efficiency. While it may not meet the demands of larger households, its performance and reliability make it a valuable addition to any home or small business.
To buy this product, click here.
Rheem 18kW Tankless Electric Water Heater
Rheem 18kW 240V Tankless Electric Water Heater is designed to provide on-demand hot water, ideal for homeowners seeking energy-efficient solutions. Its compact size, measuring 18 inches in height and 14 inches in width, and sleek gray color ensure it fits seamlessly into any space. Made with durable copper immersion heating elements, this water heater guarantees longevity and reliability, making it a perfect choice for residential use.
This product addresses the common issue of running out of hot water during peak usage times. With a flow rate of up to 4.4 GPM, it efficiently meets the hot water demands of multiple fixtures simultaneously, enhancing the user experience significantly.
Pros
- Advanced self-modulation technology adjusts power based on hot water demand, optimizing energy use.
- Durable copper heating elements ensure long-lasting performance and easy maintenance.
- External digital thermostatic control with LED display allows for precise temperature adjustments (+/- 1 degree accuracy).
- Simple installation with bottom 3/4 inch NPT water connections makes it accessible for DIY enthusiasts.
Cons
- Initial cost may be higher compared to traditional tank water heaters.
- Requires a minimum electrical capacity, which may necessitate additional upgrades in older homes.
The Rheem 18kW Tankless Electric Water Heater stands out with its user-friendly features and efficient performance. Its digital temperature display is easy to read, allowing users to monitor and adjust settings effortlessly. This product is best suited for medium to large households where hot water demand is high, ensuring that everyone can enjoy hot showers without interruptions.
While the initial investment might be a consideration, the long-term savings on energy bills and the convenience of endless hot water make it a valuable addition to any home. Overall, the Rheem 18kW 240V Tankless Electric Water Heater is a reliable choice for those seeking efficiency and performance in their hot water solutions.
To buy this product, click here.
Faq about Radiant Tankless Water Heater:
1:What is a radiant tankless water heater?
A radiant tankless water heater heats water on demand, providing a continuous supply without the need for a storage tank.
2:How does a radiant tankless water heater work?
It uses powerful heating elements to rapidly warm water as it flows through the unit, ensuring instant hot water.
3:What are the benefits of using a radiant tankless water heater?
Benefits include energy efficiency, space savings, and an endless supply of hot water, reducing heating costs.
4:How much energy does a radiant tankless water heater save?
It can save up to 30% on energy bills compared to traditional tank heaters by heating water only when needed.
5:What size radiant tankless water heater do I need?
Size depends on your household’s hot water demand. Consult a professional to determine the right capacity for your needs.
6:Are radiant tankless water heaters easy to install?
Installation can be complex and is best performed by a licensed plumber to ensure proper setup and safety.
7:What maintenance is required for a radiant tankless water heater?
Regular descaling and filter cleaning are recommended to maintain efficiency and prolong the unit’s lifespan.
Conclusion
The Rinnai RX199iN exemplifies excellence in performance, delivering an impressive flow rate and energy efficiency, making it a premier choice for those seeking reliability and innovation in their hot water solutions. Its advanced technology ensures consistent temperature control, catering to diverse household demands.
Conversely, the ECOTINYMACH 110V stands out for its compact design and ease of installation, providing an efficient solution for smaller spaces. This electric tankless model is ideal for budget-conscious consumers, combining affordability with commendable performance, thus appealing to a wide range of users.





