As you consider making your home more sustainable, tankless water heaters present a compelling option. In 2025, eco-friendly models are set to dominate the market, offering energy efficiency and convenience. With various options like the EcoSmart ECO 27 and Stiebel Eltron Tempra 29 Trend, choosing the right one can be overwhelming. Let’s explore the top contenders and what factors you should weigh before making a decision.
EcoSmart ECO 11 Electric Tankless Water Heater
If you’re looking for an efficient and compact solution for your hot water needs, the EcoSmart ECO 11 Electric Tankless Water Heater is a standout choice. Weighing just 6.5 pounds and measuring 11.5 x 8 x 3.75 inches, it’s 90% smaller than traditional tank heaters. With a powerful 13KW output, it provides endless hot water on demand, maintaining a consistent temperature within 1°F. Suitable for small sinks and bathrooms, it supports one shower in colder climates or two in warmer ones. Plus, with 99% thermal energy efficiency, it heats water only when needed, making it a smart, eco-friendly option for your home.
Best For: Individuals or families living in smaller spaces who require an efficient, on-demand hot water solution for low-flow applications like bathrooms and small sinks.
Pros:
- Compact and lightweight design, making it easy to install in tight spaces.
- Provides endless hot water with a consistent temperature, eliminating the risk of running out.
- High thermal energy efficiency of 99%, saving on energy costs.
Cons:
- Limited flow rate of 3.1 gallons per minute may not be sufficient for larger households with multiple simultaneous hot water demands.
- Requires a higher amperage draw and specific electrical setup, which may necessitate professional installation.
- Performance may vary in extremely cold climates with lower incoming water temperatures.
EcoSmart ECO 8 Tankless Water Heater
The EcoSmart ECO 8 Tankless Water Heater is an ideal choice for eco-conscious homeowners looking to save energy without sacrificing performance. With an impressive efficiency rating of 99.8%, you’ll enjoy hot water on demand while reducing your energy bills. This electric unit, weighing just 4.75 pounds, features a compact wall-mounted design, making it perfect for small spaces. You can easily control the temperature in 1°F increments using its user-friendly digital display. Suitable for climates with incoming water temperatures of 67°F and above, it’s backed by a lifetime warranty on electronics, ensuring peace of mind with your purchase.
Best For: Eco-conscious homeowners seeking an efficient and compact water heating solution.
Pros:
- High Efficiency: With a 99.8% efficiency rating, it significantly reduces energy consumption and costs.
- Compact Design: Wall-mounted and lightweight, making it ideal for small spaces or limited installations.
- User-Friendly Controls: Easy digital temperature control allows precise adjustments in increments of 1°F.
Cons:
- Limited Flow Rate: Maximum flow rate of 2 gallons per minute may not be sufficient for larger households or simultaneous use.
- Temperature Limitations: Best suited for warmer climates with incoming water temperatures of 67°F and above.
- Electric Dependence: Requires a reliable electrical supply, which may not be feasible in all locations.
EcoSmart ECO 18 Electric Tankless Water Heater
With its impressive 99.8% efficiency rating, the EcoSmart ECO 18 Electric Tankless Water Heater is an ideal choice for eco-conscious homeowners looking to reduce their energy consumption. This compact, wall-mounted unit operates at 18 kW and delivers up to 3.51 gallons per minute, making it perfect for simultaneous use of a shower and sink. Its patented Self Modulating Technology optimizes energy use, while the digital temperature control allows for precise adjustments. Weighing just 14 pounds, it’s easy to install. Plus, with a lifetime warranty on key components, you can trust its long-term reliability and performance.
Best For: Eco-conscious homeowners seeking an efficient and compact water heating solution for their homes.
Pros:
- Highly efficient with a 99.8% efficiency rating, reducing energy costs.
- Compact design allows for easy wall mounting and installation in small spaces.
- Lifetime warranty on electronics, exchanger, and element provides peace of mind for long-term use.
Cons:
- Limited performance in colder climates, requiring a minimum incoming water temperature of 62°F.
- Installation may require professional assistance, adding to initial costs.
- Maximum flow rate of 3.51 gallons per minute may not suffice for larger households with higher simultaneous demands.
EcoSmart ECO 27 Tankless Water Heater
For homeowners in cold climates or those with high water demands, the EcoSmart ECO 27 Tankless Water Heater stands out as an eco-friendly solution that delivers impressive performance. With a 27-kW electric design and a maximum flow rate of 6.6 gallons per minute, it efficiently heats water even in temperatures as low as 37°F. Its self-modulating technology guarantees energy is used wisely, achieving an energy efficiency of 99.8%. Plus, the digital display allows for precise temperature control. Weighing only 11 lbs and mounted on the wall, it’s a compact, powerful option for any sustainable household.
Best For: Homeowners in cold climates or those with high water demands looking for an efficient and compact tankless water heating solution.
Pros:
- High Energy Efficiency: Achieves 99.8% efficiency, reducing energy costs.
- Compact Design: Weighs only 11 lbs and can be easily mounted on walls, saving space.
- Self-Modulating Technology: Automatically adjusts energy usage based on water flow, ensuring optimal performance.
Cons:
- Requires Significant Electrical Setup: Needs three 40 DP breakers and 8 AWG wire, which may require professional installation.
- Limited Maximum Temperature: Capable of heating water up to a maximum of 120°F, which might not be sufficient for all users.
- Warranty Limitations: Limited lifetime warranty does not cover labor or incidental damages, which may lead to unexpected costs.
Stiebel Eltron Tankless Water Heater – Tempra 29 Trend
Looking for an efficient hot water solution? The Stiebel Eltron Tempra 29 Trend is your answer. This compact, wall-mounted electric unit delivers on-demand hot water without the need for venting. With a temperature range of 68°F to 140°F, you can enjoy unlimited hot showers, even in cooler climates. Its intelligent self-modulating technology guarantees energy isn’t wasted, making it eco-friendly and cost-effective. Plus, you’ll appreciate the silent operation and easy-to-read digital display. With a solid 7-year leakage warranty and a 30-day return policy, this tankless water heater is a reliable choice for your sustainable living needs.
Best For: Homeowners looking for an energy-efficient, on-demand hot water solution for multiple bathrooms or showers.
Pros:
- Unlimited hot water supply ensures no interruptions during use.
- Eco-friendly self-modulating technology reduces energy consumption.
- Compact design allows for easy wall mounting and fits into small spaces.
Cons:
- Initial installation may require professional assistance.
- Performance may vary in extremely cold climates.
- Higher upfront cost compared to traditional tank water heaters.
Ecosmart ECO 24 Electric Tankless Water Heater
The Ecosmart ECO 24 Electric Tankless Water Heater stands out as the ideal choice for homeowners seeking an efficient and eco-friendly solution for their hot water needs. With a powerful 24 kW at 240 volts, it delivers a maximum flow rate of 5.8 gallons per minute, making it perfect for larger households. Its patented self-modulating technology guarantees 99.8% efficiency, while digital temperature control lets you adjust in 1-degree increments. Weighing just 14.25 pounds and measuring 17 x 17 x 3.5 inches, it’s easy to mount on the wall. Plus, it comes with a lifetime warranty on electronics, providing long-term peace of mind.
Best For: Homeowners in need of an efficient and reliable tankless water heater for larger households.
Pros:
- 99.8% Efficiency: The patented self-modulating technology ensures maximum energy savings and reduced utility bills.
- High Flow Rate: Capable of delivering up to 5.8 gallons per minute, making it suitable for multiple simultaneous hot water demands.
- Lifetime Warranty: Provides peace of mind with a warranty covering electronics, heat exchanger, and element.
Cons:
- Initial Cost: Higher upfront investment compared to traditional tank water heaters.
- Installation Requirements: May require professional installation, which can add to overall costs.
- Temperature Limitations: Maximum output temperature of 130°F may not be sufficient for all users’ preferences.
ECOTOUCH 18kW Tankless Electric Water Heater
Eco-conscious homeowners seeking an efficient water heating solution will find the ECOTOUCH 18kW Tankless Electric Water Heater an ideal choice. This compact unit delivers instant hot water at 120℉ or higher without any preheating. Perfect for kitchens, bathrooms, and even RVs, its user-friendly touch control panel allows easy temperature adjustments. Safety features, including over-temp and leakage protections, guarantee reliable performance. With an impressive energy efficiency rating of 99.8%, you can save up to 60% on electric charges compared to traditional heaters. Installing the ECOTOUCH means enjoying comfort while being kind to the planet.
Best For: Eco-conscious homeowners looking for an efficient and compact water heating solution for kitchens, bathrooms, and RVs.
Pros:
- User-friendly touch control panel for easy temperature adjustments.
- Energy efficiency rating of 99.8%, resulting in significant savings on electric bills.
- Equipped with multiple safety features to ensure reliable and secure operation.
Cons:
- Requires specific electrical installation with a 2X40A Double Pole Breaker, which may involve additional costs.
- Limited to point of use installation, meaning it may not serve multiple fixtures simultaneously.
- Compact size may not suit larger households needing higher water demand.
ORBEK 14kW Electric Tankless Water Heater
For homeowners seeking an efficient and sustainable hot water solution, the ORBEK 14kW Electric Tankless Water Heater stands out with its impressive energy efficiency. This on-demand heater delivers endless hot water in just three seconds, supporting 2-3 points of use with a flow rate of up to 3.38 GPM. Its compact design saves over 50% space, making it perfect for smaller homes. With a voltage of 240V, it reduces electricity costs by up to 60%. Safety features like leakage and over-temperature protection guarantee peace of mind. Plus, the user-friendly LED display makes temperature adjustments a breeze.
Best For: Homeowners looking for an efficient and space-saving hot water solution that provides instant and endless hot water.
Pros:
- High energy efficiency, reducing electricity costs by up to 60% compared to traditional tank heaters.
- Compact design saves over 50% space, ideal for smaller homes or apartments.
- Advanced safety features including leakage and over-temperature protection for peace of mind.
Cons:
- Requires a 240V/60AMP two-pole breaker and specific wiring, which may necessitate professional installation.
- Flow rate may not be sufficient for larger households with high simultaneous hot water demand.
- Initial investment cost may be higher than traditional tank water heaters.
EcoSmart ECOS 27 Tankless Electric Water Heater
Looking for an efficient way to guarantee your home has a constant supply of hot water? The EcoSmart ECOS 27 Tankless Electric Water Heater could be your solution. With a powerful 27 kW output, this self-modulating unit provides endless hot water, delivering 2.7 to 6.6 gallons per minute based on the inlet temperature. It’s 96% energy efficient, heating water only when you need it. Compact and wall-mountable, its size is 90% smaller than traditional tanks. Plus, it comes with a 5-year warranty on leaks, ensuring peace of mind. Upgrade to sustainable living with the EcoSmart ECOS 27!
Best For: Homeowners looking for an energy-efficient, space-saving solution for endless hot water supply.
Pros:
- Endless hot water supply with on-demand heating, ensuring comfort for multiple users.
- Compact size makes it 90% smaller than traditional tank heaters, allowing for flexible installation options.
- High energy efficiency (96%) reduces energy costs by heating water only when needed.
Cons:
- Requires a significant electrical capacity (27 kW at 240 Volts) which may necessitate electrical upgrades in some homes.
- Flow rate depends on inlet water temperature, which may limit performance in colder climates.
- Initial installation cost can be higher compared to traditional water heaters.
110V Tankless Electric Water Heater
The ECOTINYMACH 110V Tankless Electric Water Heater is an excellent choice for those who need a compact and efficient solution for under-sink installation. Weighing only 2.4 pounds and measuring just 4.53 x 2.36 x 7.87 inches, it fits seamlessly into tight spaces. With a powerful 3000W output, you’ll enjoy quick, on-demand hot water while reducing energy bills. The unit features a convertible temperature scale, LED display, and safety mechanisms like overheat and dry combustion protection. Installation is straightforward, requiring a circuit breaker of at least 32AMP. Plus, its rustproof design guarantees longevity, making it eco-friendly and reliable.
Best For: Individuals seeking a compact, energy-efficient water heating solution for small spaces or under-sink installation.
Pros:
- Energy-efficient design that helps reduce energy bills.
- Compact size allows for easy installation in tight spaces.
- Equipped with safety features like overheat and dry combustion protection.
Cons:
- Requires a circuit breaker of at least 32AMP, which may necessitate additional electrical work.
- Customer rating of 3.9 out of 5 stars indicates mixed feedback.
- Limited warranty period of only 30 days may not provide sufficient coverage for long-term use.
Factors to Consider When Choosing Eco Friendly Tankless Water Heaters
When choosing an eco-friendly tankless water heater, you’ll want to evaluate several key factors. Think about the energy efficiency rating, size requirements, and compatibility with your power source. Additionally, the water flow rate and installation complexity can greatly impact your overall experience and satisfaction.
Energy Efficiency Rating
Choosing an eco-friendly tankless water heater involves understanding its energy efficiency rating, as this directly impacts your energy bills and environmental footprint. Look for models with ratings as high as 99.8%, which indicate minimal energy waste compared to traditional tank heaters. Many modern units use self-modulating technology, adjusting energy output based on flow rate and temperature settings to enhance efficiency. You’ll find that top models achieve thermal energy efficiency ratings around 96% to 99%, considerably lowering your electricity costs. Additionally, opting for Energy Star certified heaters guarantees you’re selecting products that meet superior energy efficiency and performance standards, helping reduce greenhouse gas emissions tied to your energy consumption. Make this choice for a more sustainable home!
Size and Space Requirements
Selecting the right size for your eco-friendly tankless water heater is crucial for optimizing performance and space. Many models are up to 90% smaller than traditional tank heaters, offering flexible installation options in tight areas. Check the unit’s weight; many weigh under 15 pounds, making wall mounting easier. Confirm the power requirements match your home’s electrical system to prevent costly upgrades—some heaters operate at 240 volts and require specific amperage. Also, verify the maximum flow rate to meet your household’s hot water needs, as performance can vary greatly; some models deliver up to 6.6 gallons per minute. Finally, consider point-of-use installations to save space and reduce wait times for hot water, particularly in smaller homes or apartments.
Power Source Compatibility
Before investing in an eco-friendly tankless water heater, it’s essential to verify its compatibility with your home’s electrical system. Most units require a voltage of 240V for peak performance, so make sure your setup can accommodate this. Pay attention to the amperage draw; higher wattage models might need dedicated circuit breakers and specific wiring to avoid overload and guarantee safety. Additionally, confirm that the unit’s installation requirements align with your existing plumbing and electrical setups for a smooth changeover. Look for heaters with self-modulating technology, as they adjust heating power based on water flow, enhancing energy efficiency. This not only saves energy but also helps you meet your household’s hot water demands effectively.
Water Flow Rate
When you’re considering an eco-friendly tankless water heater, understanding the water flow rate is crucial for meeting your household’s hot water needs. The flow rate, measured in gallons per minute (GPM), indicates how much hot water the unit can deliver at any moment. If your home has multiple outlets—like showers, sinks, and appliances—opt for a higher flow rate to guarantee a consistent supply. Most residential models range from 2 to 6.6 GPM, but remember that colder incoming water can lower the effective flow rate. To make certain you have enough hot water during peak demand, choose a tankless water heater with a flow rate that suits your household’s specific needs. This way, you’ll always have hot water when you need it.
Installation Complexity
Although the allure of eco-friendly tankless water heaters is strong, installation complexity can pose challenges you need to contemplate. Many models require dedicated circuit breakers of 40 amps or higher, complicating the process, especially in older homes with outdated electrical systems. You might also need to size the wiring appropriately, often using 8 AWG or 6 AWG wires. Wall-mounted installations are common but may need additional support structures, particularly in tight spaces. While point-of-use installations can simplify the process, they may demand extra plumbing adjustments. Although their compact design offers flexibility, you must guarantee proper ventilation and accessibility for maintenance. Weigh these factors carefully to make the best choice for your home.
Safety Features Included
Choosing an eco-friendly tankless water heater means considering important safety features that protect both you and your home. Many models come equipped with over-temperature protection systems, ensuring the water never exceeds safe levels during use. Leakage protection is also essential; it detects leaks and automatically shuts off the heater, preventing water damage. Advanced units often include dry-heating protection, which stops the heater from operating without water, minimizing damage risk. Additionally, some heaters have lightning resistance features to safeguard against electrical storms and power surges. Finally, reliable manufacturers conduct regular safety testing before their products leave the factory, ensuring that you can trust their performance and safety standards for peace of mind in your sustainable living journey.
Temperature Control Options
Many homeowners overlook the importance of temperature control options when selecting an eco-friendly tankless water heater. You’ll want to take into account models with digital temperature control, which allows you to set your desired temperature in precise 1°F increments. Most electric tankless water heaters offer a maximum output ranging from 120°F to 140°F, accommodating various household needs. Look for units that feature patented self-modulating technology, which adjusts the heating power based on water flow and temperature, enhancing energy efficiency. Additionally, temperature stability is essential; many units maintain water temperature within ±1°F of your selected setting, ensuring consistent hot water. Some models can efficiently heat water at lower incoming temperatures, delivering nearly 3 gallons per minute even at 37°F, making them versatile for your home.
Warranty and Support Services
When considering an eco-friendly tankless water heater, it’s vital to pay attention to warranty and support services, as these factors can greatly influence your long-term satisfaction. Look for a lifetime warranty on key components like electronics and heat exchangers, which assures durability. Be cautious, though; many warranties only cover the heater itself, excluding labor and incidental damages, which can affect your overall costs. Check the manufacturer’s customer service availability, as responsive support is important for troubleshooting and maintenance. Additionally, a 30-day return policy is common, allowing you to evaluate your purchase risk-free. Warranty terms can vary considerably, so compare coverage details across brands to make an informed choice that suits your needs.
