The Most Reliable Tankless Hot Water Heater, Ranked

Voting rules: Choose the tankless hot water heater you think is the most reliable!

Updated on Apr 27, 2024 06:57

In the middle of a freezing winter morning, nothing compares to the comfort of a warm shower. However, the reliability of your water heater can often make or break this experience. Imagine stepping into the shower only to be greeted by cold water because your old tank heater failed again. This is where the efficiency and reliability of a good tankless hot water heater become apparent. By choosing a reliable tankless hot water heater, not only do you enjoy consistent hot water, but you can also save on energy costs and space in your home. Having a comprehensive and dynamically ranked list of reliable models can guide you in making an informed decision tailored to your needs. This is why your votes and feedback are crucial; they help create a trustworthy resource that benefits everyone seeking to upgrade their home water heating system.

What Is the Most Reliable Tankless Hot Water Heater?

1

56
votes
Rinnai RUC98iN

Rinnai Corporation

This tankless water heater is known for its high efficiency and reliability. It has a compact design that can fit in tight spaces and can provide endless hot water for multiple applications.
The Rinnai RUC98iN is a tankless hot water heater known for its reliability and efficiency. It provides instant hot water on demand, ensuring a continuous supply of hot water for various household needs.

Maximum BTU: 199,000

Flow Rate: Up to 9.8 gallons per minute

Fuel Type: Natural gas or propane

Energy Efficiency: Up to 0.96 Energy Factor

Temperature Range: 98°F - 140°F
2

25
votes
Navien NPE-240A

Navien

This tankless water heater has a high-efficiency rating and can provide hot water for both residential and commercial applications. It has a user-friendly interface and can be controlled remotely using a mobile app.
The Navien NPE-240A is a highly reliable and efficient tankless hot water heater designed for residential use. It provides on-demand hot water supply while conserving energy.

Flow Rate: Up to 11.2 gallons per minute

Energy Efficiency: Up to 97% efficient

BTU Input: 19,900 - 199,900

Hot Water Temperature Range: 98°F - 140°F

Isolation Valve Kit: Included
3

20
votes
Takagi T-K4-IN-NG

Takagi

This tankless water heater has a high flow rate and can provide hot water for multiple applications simultaneously. It has a compact design and is easy to install.
The Takagi T-K4-IN-NG is a highly reliable tankless hot water heater that is designed to provide instant and endless hot water supply. It is powered by natural gas and offers efficient and effective heating performance for both residential and commercial applications.

Flow Rate: 8.0 GPM

Fuel Type: Natural Gas

BTU (British Thermal Units): 190,000

Energy Efficiency: Up to 0.82

Temperature Range: 98°F - 140°F
4

18
votes
Rheem RTGH-95DVLN

Rheem Manufacturing Company

This tankless water heater has a high-efficiency rating and can provide hot water for multiple applications. It has a self-diagnostic system that can detect any issues and troubleshoot them.
The Rheem RTGH-95DVLN is a highly reliable tankless hot water heater designed to provide continuous hot water on demand. It utilizes advanced condensing technology and features a compact and efficient design.

Maximum Flow Rate: 9.5 gallons per minute

Energy Efficiency: Up to 94% energy efficiency

Venting Type: Direct Vent

Fuel Type: Natural Gas

Heat Exchanger: Stainless Steel
5

20
votes
Bosch Greentherm C 1050 ES

Bosch Thermotechnology

This tankless water heater can provide hot water for both residential and commercial applications. It has a high-efficiency rating and can save energy and money on utility bills.
The Bosch Greentherm C 1050 ES is a tankless hot water heater designed for residential and commercial use. It provides on-demand hot water without the need for a storage tank, offering energy efficiency and space savings. The unit is manufactured by Bosch Thermotechnology, a leading brand in the heating and cooling industry.

Flow rate: Up to 10.5 gallons per minute

Energy efficiency: 0.95 Uniform Energy Factor (UEF)

Fuel type: Natural gas or propane

Venting: Direct vent or single vent up to 45 feet

Temperature range: 98°F to 185°F
6

11
votes
Noritz NR981-SV-NG

Noritz

This tankless water heater has a high flow rate and can provide hot water for multiple applications simultaneously. It has a compact design and is easy to install.
The Noritz NR981-SV-NG is a tankless hot water heater that provides reliable and efficient hot water heating. It is designed to be used with natural gas as the fuel source.

Flow Rate: 9.8 gallons per minute

Energy Efficiency: Energy Star certified with a .91 Uniform Energy Factor

Temperature Range: 98°F to 140°F

Minimum Activation Flow Rate: 0.5 gallons per minute

Venting: Direct Vent
7

12
votes

Eccotemp L10

This tankless water heater is portable and can be used for outdoor applications such as camping, RVs, and cabins. It has a simple design and is easy to use.
8

10
votes
Stiebel Eltron Tempra Plus

Stiebel Eltron

This tankless water heater has a high-efficiency rating and can provide hot water for multiple applications. It has a compact design and can be installed in tight spaces.
The Stiebel Eltron Tempra Plus is a tankless hot water heater that provides reliable and efficient hot water supply. It is designed to deliver continuous hot water on-demand, making it suitable for both residential and commercial use. The unit is compact and easy to install, allowing for flexible placement options such as wall-mounting. It features advanced technology and various safety mechanisms to ensure optimal performance and user protection.

Flow Rate: Up to 5.4 GPM

Temperature Range: 86°F to 140°F

Power Output: 27 kW

Voltage: 240 V

Energy Efficiency: 99%
9

8
votes
Marey ECO150

Marey

This tankless water heater has a high flow rate and can provide hot water for multiple applications simultaneously. It has a simple design and is easy to install.
The Marey ECO150 is a highly reliable tankless hot water heater that provides consistent and efficient water heating. It utilizes advanced technology to deliver instant hot water on demand, eliminating the need for a storage tank and reducing energy consumption. It is a compact and space-saving unit suitable for both residential and commercial applications.

Maximum Flow Rate: 4.4 gallons per minute

Energy Efficiency: 99.8%

Voltage: 240V

Water Connection: 1/2 inch NPT

Temperature Range: Max 140°F
10

2
votes
Titan SCR2 N-120

Titan Tankless Water Heaters

This tankless water heater has a high-efficiency rating and can provide hot water for multiple applications. It has a simple design and is easy to install.
The Titan SCR2 N-120 is a tankless hot water heater designed to provide on-demand hot water. It is compact and energy-efficient, making it ideal for residential and commercial applications with moderate hot water demands.

Type: Electric

Capacity: 3.0 Gallons Per Minute (GPM)

Voltage: 220 Volts

Amperage: 54 Amps

Energy Efficiency: 99.5%

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Ranking factors for reliable tankless hot water heater

Brand Reputation

Look for established and reputable brands that are known to produce reliable and durable tankless hot water heaters.
Flow Rate

Consider the flow rate of the heater to ensure that it can meet your household's hot water demands.
Energy Efficiency

Select a tankless hot water heater with high energy efficiency ratings to minimize your energy bills.
Size of the Unit

The size of the unit should be in accordance with your household's hot water requirements, including the number of bathrooms and the number of people in the household.
Installation and Maintenance Requirements

The tankless hot water heater you choose should be easy to install and maintain, making it cost-effective over the long term.
Warranty

Ensure that the tankless hot water heater has a good warranty period to provide peace of mind regarding any potential issues that may arise.

About this ranking

This is a community-based ranking of the most reliable tankless hot water heater. We do our best to provide fair voting, but it is not intended to be exhaustive. So if you notice something or Heater is missing, feel free to help improve the ranking!

Statistics

1322 views
183 votes
10 ranked items

Voting Rules

A participant may cast an up or down vote for each Heater once every 24 hours. The rank of each Heater is then calculated from the weighted sum of all up and down votes.

More information on most reliable tankless hot water heater

Tankless hot water heaters have been gaining popularity in recent years due to their energy efficiency and space-saving design. Unlike traditional water heaters that store hot water in a tank, tankless heaters heat water on demand as it flows through the unit. This means that you only use energy to heat the water you need, rather than constantly heating and reheating water in a tank. In addition, tankless heaters take up less space and have a longer lifespan than traditional heaters. When it comes to reliability, there are many factors to consider, such as the brand, type of fuel used, and maintenance requirements. By doing your research and considering your specific needs, you can find the most reliable tankless hot water heater for your home.