Are you tired of running out of hot water during your showers? A tankless water heater can provide a continuous supply, ensuring comfort and convenience.
Tankless water heaters, like the ECOTINYMACH 110V and Rheem 18kW, are designed to heat water on demand. They are compact and efficient, saving space while providing instant hot water. The ORBEK 14kW model features a user-friendly LED display, simplifying temperature adjustments.
In our full review, we break down performance, durability, and more to help you choose the best tankless water heater for your needs.


ECOTINYMACH 110V Tankless Water Heater
ECOTINYMACH 110V Tankless Water Heater Electric: 12” long, ABS plastic, 2-year warranty.
Benefits
- Holds 5L without tipping.
Drawbacks
- No dishwasher-safe parts.
The ECOTINYMACH 110V Tankless Water Heater is a compact solution for those needing efficient hot water without the bulk of traditional heaters. Its impressive design allows it to fit snugly in small spaces, making it ideal for apartments or under-sink installations.
One of the standout features is its ability to hold up to 5 liters of water without tipping, ensuring stability during use. The heater also offers a convertible temperature scale, allowing users to easily switch between Fahrenheit and Celsius, catering to personal preferences.
Installation is straightforward, designed for simplicity and efficiency, which is a significant advantage for DIY enthusiasts. Being electric and tankless, it not only heats water on demand but also contributes to energy savings, reducing your overall carbon footprint.
However, it’s worth noting that the unit has no dishwasher-safe parts, which may require more manual cleaning and maintenance. This could be a drawback for some users who prefer low-maintenance appliances.
A practical pick for small spaces, the ECOTINYMACH tankless water heater is an excellent choice for those seeking convenience and efficiency in their hot water solutions.
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ORBEK 14kW Electric Tankless Water Heater
14kW Tankless Water Heater Electric: 14.2” H x 9.5” L x 3.1” W, ETL Certified, 2-year warranty.
Benefits
- Provides up to 3.38 GPM of instant hot water for 2-3 points of use simultaneously.
Drawbacks
- Requires a 240V/60AMP two-pole breaker for installation.
This compact tankless water heater is ideal for small spaces, providing endless hot water on demand. With its high energy efficiency, it can reduce electricity costs by up to 60% compared to traditional tank heaters. The built-in chip ensures stable temperature control, adjusting heating power 20,000 times per second, keeping the water temperature within 1°F for a comfortable experience.
The LED digital display is user-friendly, allowing easy adjustments between 86°F and 140°F while showing real-time temperature changes. Installation is straightforward due to its compact size, making it suitable for tight corners in your home.
However, potential buyers should note that it requires specific electrical setup, which may involve additional installation costs. Overall, this product is a practical pick for anyone looking to maximize efficiency and convenience in small living spaces.
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Rheem 18kW Tankless Electric Water Heater
Rheem 18kW 240V Tankless Electric Water Heater: 12” long, ABS plastic, 2-year warranty.
Benefits
- Flow rate of up to 4.4 GPM ensures ample hot water supply for multiple outlets.
Drawbacks
- No dishwasher-safe parts may complicate cleaning for some users.
The Rheem 18kW Tankless Electric Water Heater is designed for efficiency and convenience. Its external digital thermostatic control with LED display offers +/- 1 degree accuracy, allowing precise temperature adjustments. The advanced self-modulation technology ensures that power is adjusted according to hot water demand, optimizing energy usage and reducing costs.
Installation is straightforward, with bottom 3/4 inch NPT water connections that simplify setup. The durable copper immersion heating elements are field serviceable, making maintenance easier for homeowners. This unit is particularly beneficial for those with limited space, as it provides a continuous supply of hot water without the bulk of a traditional tank heater.
While the unit excels in performance and ease of use, potential buyers should note that there are no dishwasher-safe parts, which may require more careful handling during cleaning. Overall, this product is a practical pick for small spaces, delivering reliable hot water on demand for households looking to maximize efficiency without compromising on performance.
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EcoSmart Tankless Electric Water Heater 3000W
Tankless Water Heater Electric 110V: 12” long, ABS plastic, 2-year warranty.
Benefits
- Holds 5L without tipping.
Drawbacks
- No dishwasher-safe parts.
The Tankless Water Heater Electric 110V offers an impressive solution for instant hot water needs. With a power output of 3000W, it can heat water quickly, raising temperatures by up to 82°F at 0.3 GPM and 131°F at 0.5 GPM. The compact design makes it ideal for small spaces, fitting neatly under sinks in kitchens, bathrooms, and even RVs.
Safety features are robust, including IPX4 waterproofing, leakage protection, and dry boil protection. This ensures peace of mind during use, while the high thermal efficiency of 98% maximizes energy savings. The user-friendly LED display allows for easy temperature adjustments, providing both Fahrenheit and Celsius settings.
However, it’s important to note that there are no dishwasher-safe parts, which may be a downside for some users. Additionally, the unit requires vertical installation to function properly, limiting placement options.
This product is a practical pick for small spaces, providing reliable hot water on demand without the bulk of traditional tanks. Ideal for apartments or compact homes, it meets daily hot water needs efficiently.
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Stiebel Eltron 3500W Tankless Water Heater
Tankless Water Heater Electric 110V, 3500W Instant Hot Water Heater: 12” long, ABS plastic, 2-year warranty.
Benefits
- Provides hot water in 3 seconds with a constant temperature, enhancing convenience.
- Energy-efficient with a thermal efficiency of 99%, saving on electricity costs.
- Compact design allows installation in small spaces, ideal for kitchens and laundry sinks.
- Temperature adjustable from 68°F to 131°F, offering flexibility for various needs.
- Safety features include anti-dry burning and over-temperature protection, ensuring peace of mind.
Drawbacks
- No shower compatibility, limiting its use to sinks only.
- No dishwasher-safe parts, requiring manual cleaning.
This tankless water heater is a practical pick for small spaces. Its quick heating capability and compact design make it suitable for apartments or homes with limited room. The safety features enhance its appeal, providing reliable hot water without the worry of leaks or burns. However, potential users should note its limitations, particularly regarding shower use and cleaning. Overall, it’s a solid choice for those seeking efficient hot water solutions without the bulk of traditional heaters.
To buy this product, click here.
Faq about Eternal Tankless Water Heater:
1: What is an Eternal tankless water heater?
An Eternal tankless water heater is an on-demand water heating system that provides hot water only when needed, eliminating the need for a storage tank.
2: How does an Eternal tankless water heater work?
It heats water directly as it flows through the unit, using gas or electricity, ensuring a continuous supply of hot water.
3: What are the benefits of using an Eternal tankless water heater?
Benefits include energy efficiency, space savings, longer lifespan, and an endless supply of hot water.
4: How much energy can an Eternal tankless water heater save?
It can save up to 30% on energy bills compared to traditional water heaters due to its on-demand heating capability.
5: What is the lifespan of an Eternal tankless water heater?
These units typically last 20 years or more with proper maintenance, significantly longer than conventional water heaters.
6: Can I install an Eternal tankless water heater myself?
While some may attempt DIY installation, professional installation is recommended to ensure safety and compliance with local codes.
7: Are there any maintenance requirements for Eternal tankless water heaters?
Regular flushing to remove mineral buildup and annual inspections are recommended to maintain efficiency and longevity.
Conclusion
Both the ECOTINYMACH 110V Tankless Water Heater and the ORBEK 14kW Electric Tankless Water Heater exemplify cutting-edge efficiency and convenience in modern water heating solutions. The former is particularly suited for smaller spaces, offering a compact design without compromising performance, making it ideal for apartments or limited areas.
Conversely, the ORBEK model delivers robust power, catering to larger households with heightened demands for instantaneous hot water. Its advanced technology ensures a steady supply, underscoring its efficacy. Together, these products represent a significant advancement in sustainable heating, tailored to diverse user needs.





