What are the most reliable tankless water heater brands

What are the Most Reliable Tankless Water Heater Brands? Our Top Picks

  • If you’re looking for a quality tankless water heater and don’t know the brand to trust, this article is for you. This article explores the most reliable tankless water heater brands while also touching on the strengths and weaknesses of each brand.

It’s no longer news that we rely heavily on home appliances that offer efficiency, convenience, and savings. And when it comes to hot water, traditional water heaters, with their limited supply, often fall short of meeting our needs. This is where tankless water heaters step in as game-changers!

Tankless water heaters have transformed how we experience hot water by providing an endless, energy-efficient, and space-saving supply. But with so many brands flooding the market, how do you choose the one that’s right for your home? This article explores our top picks of tankless water heater brands that you can trust!

Pick 1 – Rinnai

What are the Most Reliable Tankless Water Heater Brands - Rinnai brand

When it comes to reliable tankless water heater brands, Rinnai stands out as a true pioneer. It is one of the best water heater brands around. With a rich history dating back to 1920, Rinnai started manufacturing pressurized oil cooking stoves in Japan. The company’s commitment to innovation and quality soon led them to diversify their product line, and in 1964, Rinnai introduced their first gas water heater.

Since then, Rinnai has continuously pushed the boundaries of tankless water heater technology, earning a stellar reputation in the industry. With decades of experience and a relentless pursuit of excellence, Rinnai has become a global leader in manufacturing tankless water heaters with unparalleled performance and efficiency.


Unlimited hot water supply

Rinnai’s tankless water heaters are designed to provide a continuous hot water supply on demand. Unlike traditional water heaters with limited storage capacity, Rinnai units heat water as it passes through the system, ensuring you never run out of hot water! Whether you have a busy household or enjoy long, relaxing showers, Rinnai has covered you with a consistent hot water flow.

Energy efficiency

Rinnai takes energy efficiency seriously. Their tankless water heaters are engineered to heat water only when you need it, eliminating the standby energy losses that occur with conventional water heaters. This energy-saving feature reduces utility bills and contributes to a greener, more sustainable environment.


When investing in a water heating system, durability matters. Rinnai tankless water heaters are built to last, and with proper maintenance, they can provide reliable hot water for decades. The absence of a storage tank also eliminates the risk of tank leaks, a common issue with traditional water heaters.

Excellent customer support

Rinnai prides itself on offering exceptional customer service. If any issues arise or questions need answering, Rinnai’s customer support team is known for their prompt and helpful assistance. This level of care adds to the overall positive experience of owning a Rinnai product.

NB: Click here to learn how to troubleshoot your Rinnai tankless water heater whenever there’s an issue.


Water quality

Hard water or high mineral content can affect tankless water heaters like any water heating system, leading to mineral buildup and reduced efficiency. Consider installing a water softener if you live in an area with hard water.


Given the technical nature of tankless water heater installation, a subpar installation could lead to performance issues and potential safety hazards. Always choose a certified installer for the best results.

Pick 2 – Rheem

What are the Most Reliable Tankless Water Heater Brands - Rheem brand

Rheem is arguably the best water heater brand in the industry, and their tankless models are no exception to their legacy of reliability. The brand offers a wide range of tankless water heaters suitable for various household sizes, ensuring a perfect fit for everyone. American standard electric water heater and gas water tankless heaters have advanced features like Wi-Fi connectivity and self-diagnostic systems, making maintenance a breeze.

Continuous advancements in technology and design have marked Rheem’s foray into tankless water heaters. Their dedication to meeting the diverse needs of customers has led to a wide array of tankless water heater models suitable for various household sizes and hot water demands. Whether you live in a small apartment or a spacious home, Rheem has a tankless water heater that fits your requirements perfectly.


Positive reputation

Positive experiences from satisfied customers contribute to Rheem’s reputation as a reliable and trustworthy brand. Word-of-mouth recommendations play a significant role in Rheem’s popularity.

Innovative solutions

Rheem stays at the forefront of water heater technology by continuously introducing innovative solutions. From energy-efficient designs to user-friendly controls, Rheem ensures its customers benefit from the latest advancements.

Reliability and durability

Rheem has a long-standing reputation for manufacturing reliable and durable water heaters. Customers appreciate the longevity of their Rheem tankless units, providing consistent hot water for years to come.

Advanced features

As one of the top water heater brands, Rheem tankless water heaters have advanced features such as self-diagnostic systems and Wi-Fi connectivity. These features allow easy maintenance and control, enhancing the overall user experience.


High initial cost

Like other tankless water heaters, Rheem units typically cost more upfront than traditional water heaters. However, the long-term energy savings often make up for the initial investment.

Requires professional installation

Homeowners who know little about plumbing may need help to install their Rheem tankless water heaters. A professional must install the units to ensure safety and efficient operation.

Pick 3 – Navien

What are the Most Reliable Tankless Water Heater Brands - Navien brand

Navien has quickly gained popularity in the tankless water heater market and for a good reason. Their innovative and eco-friendly designs have won over many homeowners. Navien’s tankless water heaters boast impressive energy efficiency ratings, ensuring you save energy and money. Additionally, they come with user-friendly interfaces and smart controls, allowing you to customize your hot water experience. If you’re looking for a blend of performance, reliability, and technology, Navien is the brand to choose.

The tankless water heaters from Navien demonstrate the company’s commitment to the energy economy. These units are designed to save energy as much as possible, allowing homeowners to lessen their carbon footprint while enjoying cheaper power expenses. Navien makes it simple for homeowners to tailor their hot water experience with user-friendly interfaces and smart controls. Whether it’s regulating the temperature or creating timetables, Navien’s technology makes it simple.


Cutting-edge technology

Navien is renowned for its innovative approach to tankless water heater design. Their units incorporate advanced technology, including condensing technology, dual stainless steel heat exchangers, and smart controls, ensuring maximum energy efficiency and performance.

Energy efficiency

Navien’s tankless water heaters are Energy Star certified, signifying their commitment to energy conservation. These units only heat water on demand, eliminating standby heat loss and significantly reducing energy consumption, leading to lower utility bills.

Offers versatile models

Navien offers diverse tankless water heater models suitable for various household sizes and hot water needs. From small units for single-point use to powerful models for large families, Navien has a solution for everyone.

Compact design

Navien’s tankless water heaters are compact and wall-mounted, saving valuable floor space in your home. Their sleek and modern design blends seamlessly with any interior, whether you have a small apartment or a spacious house.


Requires regular maintenance

Navien tankless water heaters require periodic maintenance, such as descaling the heat exchangers and checking for any issues to ensure peak performance. While regular maintenance is essential for any water heating system, homeowners should know these responsibilities.

Technical expertise needed for troubleshooting

In case of any malfunctions or issues, troubleshooting Navien tankless water heaters may require technical expertise. Homeowners might need to rely on Navien’s customer support or qualified professionals to resolve complex problems.

Pick 4 – Noritz

Noritz, with over six decades of experience, has solidified its position as a dependable tankless water heater brand. Their products are designed to withstand the test of time while providing you with a constant hot water supply. Noritz tankless water heaters also have safety features like freeze protection and overheating prevention, ensuring you and your family peace of mind.

Whether you need a tankless water heater for your home or business, Noritz offers a wide range of options to suit your needs. From compact units that can fit in small spaces to high-capacity models that can provide hot water for multiple showers and appliances simultaneously, Noritz has a tankless water heater to meet your requirements. With their advanced technology and energy efficiency, Noritz tankless water heaters can help you save money on your energy bills while providing a constant hot water supply whenever needed. The best thing, you can go easy troubleshooting in case you find an error in your water heater.


Long lifespan

Noritz tankless water heaters are known for their durability and longevity, ensuring a consistent hot water supply for years.

Wide range of products

Noritz offers gas tankless water heaters for residential and commercial use, providing solutions for different household sizes and hot water demands.

High-quality materials

Noritz prides itself on using high-end materials to construct its tankless water heaters, ensuring durability and long-lasting performance.


Lower flow rates for some models

Some Noritz tankless water heater models may have a lower flow rate, making them more suitable for smaller families with lower hot water demands.

Frequently Asked Questions

Are tankless water heaters eco-friendly?

Yes, tankless water heaters are eco-friendly due to their energy-efficient operation. They reduce energy consumption, leading to lower greenhouse gas emissions.

Can I use a tankless water heater for hot water and heating?

Some tankless water heaters are designed to handle domestic hot water needs and heating applications, such as radiant floor heating systems.

Do tankless water heaters require maintenance?

Yes, regular maintenance is essential to ensure optimal performance and longevity. Flushing the system to remove mineral deposits and checking for any issues are common maintenance tasks.

Are tankless water heaters suitable for larger households?

Many tankless water heater brands offer models with high flow rates, making them suitable for larger households with higher hot water demands.

Can I install my tankless water heater myself?

While some DIY enthusiasts may attempt it, having a professional plumber handle the installation is recommended to ensure safety and compliance with local codes.


Investing in a tankless water heater is a game-changer for your home’s hot water needs. With the most reliable tankless water heater brands like Rinnai, Rheem, Navien, and Noritz, you can enjoy endless hot water without worrying about cold showers or high utility bills.

Consider factors like household size, hot water demand, and available space when choosing the right tankless water heater for your home. Whether you’re a small household or a large family, there’s a tankless water heater that fits your needs perfectly.