best 120v tankless hot water heater that will surprise you

Struggling with inconsistent hot water for your sink? A tankless water heater can provide instant, reliable hot water on demand.

A tankless water heater serves the core purpose of delivering hot water instantly, eliminating the wait associated with traditional heaters. Top products like the ThermoMate 3500W and LECLOC Mini Tankless offer efficient solutions for small spaces, ensuring you have hot water whenever you need it. Enjoy the convenience of a temperature display and self-modulating technology that enhances energy efficiency.

Standout features include the ThermoMate’s compact design and the LECLOC’s enlarged LED display, which simplifies monitoring water temperature. Both models are designed for easy installation and feature multiprotective systems for safety, making them ideal for point-of-use applications.

In our full review, we break down performance, durability, and more to help you choose the right tankless water heater for your needs.

best 120v tankless hot water heaterbest 120v tankless hot water heaterbest 120v tankless hot water heater

best 120v tankless hot water heater

ThermoMate 3500W Electric Tankless Water Heater

#1 CHOICE

Tankless Water Heater Electric for Single Sink Faucet, ThermoMate 3500W 120V Small Point of Use Instant Hot Water Heater with Temperature Display, Self-modulating, ETL Certified

The adjustable valve sets the ThermoMate 3500W apart from other tankless water heaters, enabling precise temperature control for optimal performance. This compact unit measures 7.9″ x 6.4″ x 2.5″ and is made from durable materials, including a cast aluminum heating element and SUS 304 stainless steel water tube, ensuring longevity and resistance to corrosion.

Key Advantages

  • The self-modulating power feature allows the heater to adjust energy consumption based on demand, achieving an impressive 99.8% efficiency. This means hot water is available on demand without wasting energy.

Limitations

  • Not compatible with standard plug-in outlets, as this unit requires hardwiring and a dedicated 32A double pole circuit breaker.

Best for outdoor enthusiasts needing a reliable hot water solution for applications like hair salons, bar counters, or hotel receptions, the ThermoMate 3500W is designed for tight spaces while delivering consistent hot water. Its touch control panel and digital temperature display allow users to adjust settings in 1°F increments, enhancing user experience. With a standby mode for 24 hours, this heater is ideal for those who value efficiency and convenience in their hot water needs.

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LECLOC Mini Tankless Instant Hot Water Heater

#2 CHOICE

LECLOC Mini Tankless Under Sink Instant Hot Water Heater Electric 3kW 120V Plug in, Enlarged LED Digital Display, Knob Control, Multiprotective, IPX4, 30-55℃ Point of Use On Demand Water Heater, White

The adjustable valve sets the LECLOC Mini Tankless Under Sink Instant Hot Water Heater apart from its competitors. This 3kW 120V model features a compact design, measuring 13.5 x 8.5 x 5.5 inches, making it ideal for tight spaces. Constructed from 316-grade stainless steel, it resists corrosion and enhances durability.

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Key Advantages

  • The enlarged LED digital display, coupled with intuitive knob control, simplifies operation compared to traditional touchscreen interfaces. Users can easily adjust the temperature between 30℃ and 55℃ for optimal comfort.

Limitations

  • Not compatible with multiple taps or shower applications, limiting its use to single-point applications only.

This instant hot water heater is best for outdoor enthusiasts needing a reliable source of hot water in various settings such as kitchens, bathrooms, and offices. Its efficiency allows for 24-hour endless hot water without preheating, significantly reducing energy costs compared to traditional tank heaters. Additionally, the unit’s multi-protective features, including leakage and overheat protection, ensure safe operation, making it a smart choice for users seeking convenience and safety in one compact unit.

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Rheem 3.5kW Point of Use Water Heater

#3 CHOICE

Rheem 3.5kW 120V Point of Use Thermostatic Tankless Electric Water Heater

The adjustable valve sets the Rheem 3.5kW 120V Point of Use Thermostatic Tankless Electric Water Heater apart from its competitors. Constructed with 316-grade stainless steel, it ensures durability and resists corrosion, making it suitable for various environments. This compact unit measures just 15.75 x 11.5 x 4.5 inches, making it up to 98% smaller than traditional electric water heaters, perfect for tight spaces.

Key Advantages

  • The unit features thermostatic temperature controls that allow for precise adjustments in 1-degree increments, ranging from 80 to 140 degrees Fahrenheit, providing on-demand, consistent hot water.

Limitations

  • It is not compatible with other 240V systems, limiting its use to specific electrical setups.

Best for outdoor enthusiasts needing a reliable and efficient solution for low flow point-of-use applications, such as in a bathroom, office breakroom, wet bar, or garage, this water heater delivers convenience without sacrificing performance. Its installation is straightforward, designed to be mounted in an upright position with inlet and outlet connections conveniently located at the bottom, requiring no venting. Overall, the Rheem 3.5kW water heater is an excellent choice for those seeking a compact and efficient hot water solution.

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CAMPLUX Electric Tankless Water Heater 3.5kW

#4 CHOICE

CAMPLUX Tankless Water Heater Electric 3.5kW 120V Instant Hot Water Heater ETL Certified with Self-modulating, Save Energy, Point of Use for Kitchen, Bathroom, White

The adjustable valve sets the CAMPLUX Tankless Water Heater apart from competitors in the market. This electric model operates at 3.5kW and is designed for 120V systems, making it a practical choice for residential use. With compact dimensions of 7.8W × 6.3H × 3.9D inches, it can be easily mounted in tight spaces, making it ideal for kitchens, bathrooms, and even boats.

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Key Advantages

  • The unit is constructed from durable materials, featuring a self-modulating design that optimizes energy consumption, saving up to 98% in energy costs. The 316-grade stainless steel components resist corrosion, ensuring longevity and reliability.

Limitations

  • It is not compatible with standard plug-in systems, as it requires hardwiring and specific electrical configurations, including a 32A circuit breaker and 10AWG wire size.

Best for outdoor enthusiasts needing instant hot water solutions in remote locations or compact living spaces, the CAMPLUX Tankless Water Heater delivers efficiency and convenience. Its quick heating capability provides hot water in just 3 seconds, making it a valuable addition for those who prioritize performance and space-saving solutions.

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CAMPLUX Electric Tankless Water Heater 3.5kW

#5 CHOICE

CAMPLUX Tankless Water Heater Electric 3.5kW 120V, Point-of-Use Hot Water Heater Digital Display, Self-modulating, Overheating Protection, Black

The adjustable valve sets the CAMPLUX Tankless Water Heater apart, providing users with precise control over water temperature. This compact unit operates at 3.5kW and 120V, with dimensions of 7.8″ x 6.3″ x 3.9″, making it ideal for under-sink installations. It features a 1/2″ NPT male water pipe fitting, ensuring compatibility with standard plumbing setups.

Key Advantages

  • Constructed from **316-grade stainless steel**, the heater resists corrosion, enhancing its longevity. The **copper components** contribute to high efficiency, while the **ETL safety certification** guarantees reliability and safety during operation.

Limitations

  • It is **not compatible** with showering applications, as it is designed specifically for sink use, limiting its versatility in larger installations.

Best for outdoor enthusiasts needing a reliable and efficient hot water solution for kitchens, wet bars, or boats, the CAMPLUX tankless water heater excels in providing instant hot water on demand. Its smart design, including a rotatable LED display and self-modulating technology, ensures ease of use and energy efficiency. With a minimum water flow rate of just 0.4 GPM for activation, users can enjoy hot water quickly, making it a practical choice for various settings. The 2-year limited warranty and 24/7 customer support further enhance its appeal, ensuring peace of mind for users.

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Faq about best 120v tankless hot water heater:

1: What is a 120v tankless hot water heater?

A 120v tankless hot water heater heats water on demand using a 120-volt electrical supply, providing hot water without the need for a storage tank.

2: How does a 120v tankless hot water heater work?

It activates when a hot water tap is opened, using electric elements to heat water as it flows through the unit, ensuring a continuous supply.

3: What are the benefits of using a 120v tankless hot water heater?

Benefits include energy efficiency, space-saving design, and an endless supply of hot water, reducing the need for a bulky tank.

4: Is a 120v tankless heater suitable for my home?

It is ideal for smaller households or point-of-use applications, but may not provide sufficient flow rate for larger homes with high hot water demand.

5: How do I choose the best 120v tankless hot water heater?

Consider factors like flow rate, energy efficiency, brand reputation, and specific household needs to find the best model for your requirements.

6: Can I install a 120v tankless hot water heater myself?

While some may attempt DIY installation, it’s recommended to hire a professional for safety and compliance with local building codes.

Conclusion

The ThermoMate 3500W Electric Tankless Water Heater exemplifies efficiency and performance, delivering a steady supply of hot water while optimizing energy consumption. Its robust design and advanced technology make it a premier choice for residential applications, ensuring reliable comfort.

Conversely, the LECLOC Mini Tankless Instant Hot Water Heater offers unparalleled convenience in compact settings, ideal for small spaces or supplementary needs. Its rapid heating capabilities and user-friendly interface cater to modern lifestyles, providing instant hot water at the point of use.