Tankless Water Heater Reviews: 2023’s Top 6 Picks

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Imagine never running out of hot water again. Picture the convenience of having a continuous supply of steamy showers, warm baths, and sparkling clean dishes without ever worrying about a cold surprise with tankless hot water heaters. These heaters provide the perfect solution for all your hot water needs. Say goodbye to traditional water heaters and switch to a tankless heater for efficient use of hot water. Rheem Tankless water heaters are here to revolutionize your home’s hot water experience. With Rheem shower heads and the whole house Ecosmart Eco system, you can enjoy endless hot water without sacrificing energy efficiency.

Rheem tankless water heaters provide endless hot water on demand, thanks to their high heating capacity. With the convenience of gas-powered units, a plumber can easily install them for you. Unlike traditional storage tank water heaters, Rheem gas tankless units have a heating capacity to heat water as it flows through the system, without storing large amounts of water in gallons. This means ecosmart gas tankless water heaters are more energy-efficient hot water heaters and can help you save on utility bills while reducing your carbon footprint.

Not only are Rheem and EcoSmart tankless water heaters energy star certified, but they also have a compact design that saves valuable space in your home. Additionally, these tankless water heaters have high heating capacity. Say goodbye to bulky tanks taking up precious square footage in your basement or utility closet with electric tankless and gas conventional water heaters. With their sleek and modern appearance, ecosmart tankless models can be conveniently installed on walls or even outdoors. These models are a great alternative to conventional water heaters as they are gas-powered and can provide hot water for the whole house.

So why settle for conventional gas water heaters when you can enjoy the benefits of a tankless solution with higher heating capacity? Upgrade to an Energy Star certified tankless water heater today and save energy and gallons of water! Get ready to embrace endless hot showers and efficiency like never before with an electric tankless water heater! This Energy Star certified appliance offers incredible heating capacity without the need for gas.

Advantages and Disadvantages of Tankless vs. Storage Tank Water Heaters

Endless Hot Water Supply vs. Potential Run-Out

Tankless water heaters have a clear advantage. Unlike storage tank water heaters, which can run out of hot water after prolonged use, tankless models provide endless hot water on demand. These models have a high heating capacity and can be powered by either gas or electric. Additionally, tankless models with an Energy Star rating are energy-efficient options to consider. So, whether you’re taking a long shower or running multiple appliances simultaneously, you won’t have to worry about running out of hot water with a tankless unit. With its high heating capacity, this gas-powered tankless unit ensures a continuous supply of hot water. It also has a max gpm rate, making it perfect for households with high water demand. Plus, it is Energy Star certified, guaranteeing energy efficiency.

Longer Lifespan: A Worthwhile Investment

One significant advantage that tankless water heaters offer is their longer lifespan compared to traditional storage tank heaters. In addition, tankless water heaters have a higher heating capacity and can be powered by gas or electric. They are also more energy efficient, often earning the Energy Star certification. While storage tanks typically last around 10-15 years, tankless gas models with high heating capacity can last up to 20 years or more with proper maintenance. These energy star-rated models have received positive customer ratings. This longer lifespan makes tankless units a worthwhile investment in the long run since they can save you money on replacement costs. Additionally, tankless units have a higher heating capacity and are more energy efficient, earning them the Energy Star certification. When considering pricing, it’s important to note that tankless units are powered by electricity.

Upfront Costs: Consider Your Budget

However, when considering tankless water heaters, it’s important to take into account the upfront pricing and heating capacity. Additionally, it’s worth noting that energy star certification is a factor to consider. Compared to storage tanks, tankless units can be pricier initially due to their advanced technology and installation requirements. However, the heating capacity and energy efficiency of these electric units make them a worthwhile investment. Additionally, many tankless units are Energy Star certified, ensuring optimal performance and cost savings over time. The higher pricing may deter some homeowners who are working within a tight budget or looking for a more cost-effective option. When considering purchasing a new appliance, it’s important to take into account factors such as energy star certification and customer ratings.

Energy Efficiency: Savings Over Time

Tankless water heaters take the lead again. Their electric on-demand heating system eliminates standby energy loss commonly found in storage tanks, providing efficient capacity for continuously heating and reheating the stored water. This results in excellent customer rating for its pricing. This electric-powered appliance’s energy-saving feature translates into lower utility bills and reduced environmental impact. With its impressive heating capacity and positive customer rating, this storage tank is both efficient and eco-friendly.


  • Endless supply of hot water
  • Longer lifespan compared to storage tanks
  • Energy-efficient operation leads to cost savings over time


  • Higher upfront costs
  • Installation may require modifications

Power Outages: A Consideration for Tankless Models

One of the key consideration factors when choosing a tankless water heater is the heating capacity, which relies on electricity or gas to operate. It’s also important to look for models that have an Energy Star rating and positive customer ratings. In the event of a power outage, your heating system’s storage tank capacity may determine how long you have hot water. It is recommended to consider an Energy Star certified heating system for efficient energy usage. On the other hand, storage tank water heaters with Energy Star ratings can still provide heating during power outages since they store and heat a specific capacity of water in their tanks.

To summarize, tankless water heaters offer several advantages in terms of heating and energy efficiency over storage tank models. These advantages are evident in their Energy Star ratings. They provide an endless supply of hot water, have a longer lifespan, and are more energy-efficient due to their heating capabilities. Additionally, their storage tank allows for consistent hot water availability. These features make them popular among consumers looking for high ratings in efficiency and performance. However, when considering tankless heating units, it’s important to factor in the higher upfront costs and potential inconvenience during power outages. Additionally, it’s worth noting that Energy Star ratings can help determine the energy efficiency of these units. Ultimately, the choice between a tankless and storage tank water heater depends on your budget, lifestyle needs, and long-term goals for energy efficiency, cost savings, and ratings.

Comprehensive List of the Best Tankless Water Heaters in 2023

These top-notch appliances offer efficient and on-demand hot water without the need for a bulky storage tank. With their Energy Star ratings, these appliances are both energy-efficient and environmentally friendly. Let’s dive into the details and find out which tankless water heater suits your needs. We will consider the ratings of different tankless water heaters.

Rinnai RUC98iN Ultra Series Natural Gas Tankless Water Heater

The Rinnai RUC98iN Ultra Series Natural Gas Tankless Water Heater has impressive ratings, with a flow rate of up to 9.8 gallons per minute (GPM). This compact design is perfect for both residential and commercial applications, with its ability to store large volumes in a storage tank. Its high ratings make it a reliable choice. With its advanced technology, the storage tank allows you to enjoy endless hot water while saving energy and reducing your utility bills. The tank’s ratings ensure efficient performance.


  • A high flow rate ensures that there is enough hot water from the storage tank for multiple fixtures simultaneously, meeting the required ratings.
  • Energy-efficient operation of storage tanks helps reduce energy consumption and lower utility costs. Storage tank ratings play a crucial role in achieving these benefits.
  • The compact size of our storage tank allows for flexible installation options, even in tight spaces. With its compact design, it can be easily installed in any location without compromising its ratings.
  • User-friendly controls make it easy to adjust temperature settings and monitor performance of the storage tank. Additionally, the storage tank comes with high ratings.


  • Requires professional installation due to its complex setup.
  • The initial cost of tankless water heaters may be higher compared to traditional storage tank water heaters.
  • Regular maintenance is necessary to ensure optimal performance and longevity of storage tanks. Proper maintenance helps to maintain the ratings of the storage tank.

Rheem RTGH-95DVLN 9.5 GPM Indoor Direct Vent Tankless Natural Gas Water Heater

The Rheem RTGH-95DVLN Indoor Direct Vent Tankless Natural Gas Water Heater has impressive ratings with a flow rate of 9.5 GPM, making it ideal for larger households or commercial settings in need of a steady supply of hot water. This unit features advanced self-diagnostic technology, ensuring hassle-free operation and peace of mind for your storage tank. It has top ratings for reliability and performance.


  • The high flow rate of our storage tank meets the demands of large households or commercial establishments, making it ideal for those with high water consumption needs. Our storage tank has excellent ratings and is designed to handle the needs of even the busiest environments.
  • Self-diagnostic system allows for easy troubleshooting and maintenance.
  • Condensing technology maximizes energy efficiency, reducing operating costs.
  • Low NOx emissions make it an environmentally friendly choice.


  • Requires professional installation due to its complex venting requirements.
  • Initial cost may be higher compared to traditional storage tank water heaters.
  • Regular maintenance is necessary to prevent mineral buildup in the storage tank and ensure optimal performance.

Noritz NRC66DVNG Indoor Condensing Direct Vent Natural Gas Tankless Hot Water Heater


The Noritz NRC66DVNG Indoor Condensing Direct Vent Natural Gas Tankless Hot Water Heater is a compact and efficient option that provides a flow rate of 6.6 GPM. This storage tank unit features condensing technology, maximizing energy efficiency and reducing greenhouse gas emissions.


  • The compact size of the storage tank allows for flexible installation options in small spaces.
  • Energy-efficient operation of a storage tank helps reduce energy consumption and lower utility bills.
  • Advanced safety features, such as flame sensor technology, provide added protection for storage tanks.
  • User-friendly controls allow for easy temperature adjustment and monitoring of the storage tank.


  • May not be suitable for larger households with high hot water demand.
  • Professional installation is recommended to ensure proper venting and setup.
  • Regular maintenance is necessary to prevent mineral buildup and maintain optimal performance.

Detailed Review of the Top-Rated Tankless Water Heater

If you’re in the market for a tankless water heater, you want to make sure you invest in a top-rated model that offers high efficiency and exceptional performance. In this detailed review, we’ll take a closer look at one such tankless water heater that stands out from the rest.

High Efficiency and Performance

The top-rated tankless water heater we’re reviewing today is known for its impressive efficiency and performance. With advanced features like temperature control and self-diagnostic capabilities, this model ensures that you have hot water on demand without wasting energy or resources. It’s designed to deliver maximum comfort while minimizing energy consumption.

Advanced Features for Convenience

One of the standout features of this top-rated tankless water heater is its advanced technology that enhances convenience and ease of use. The temperature control feature allows you to set your desired hot water temperature precisely, ensuring optimal comfort every time. The self-diagnostic capabilities provide valuable information about any potential issues with the unit, making troubleshooting quick and hassle-free.

Straightforward Installation and Maintenance

Installing and maintaining this top-rated tankless water heater is relatively straightforward, even for those who aren’t experienced with plumbing or HVAC systems. The manufacturer provides clear instructions and guidelines, allowing homeowners to install it themselves or hire a professional if preferred. The compact design of the unit also makes it easy to fit into tight spaces.

Product Details

Let’s dive into some more details about this top-rated tankless water heater:

  • Brand: Rheem
  • Model: EcoSmart ECO
  • Product Type: Tankless Water Heater
  • Maximum GPM (Gallons Per Minute): 8 GPM
  • Warranty: Limited lifetime warranty on heat exchanger; 5-year warranty on parts


Here are some advantages of choosing this top-rated tankless water heater:

  • High efficiency and performance
  • Advanced features for convenience
  • Straightforward installation and maintenance
  • Compact design for easy fitting in tight spaces


While this top-rated tankless water heater has many benefits, it’s important to consider the potential drawbacks as well:

  • Higher upfront cost compared to traditional water heaters
  • May require professional installation for some homeowners
  • Limited hot water capacity for simultaneous use of multiple fixtures

Features and Performance Analysis of the Best Tankless Water Heater


There are several key features and performance factors to consider.

Precise Temperature Control for Customized Comfort

One of the standout features of the best tankless water heaters is their ability to provide precise temperature control. Unlike traditional water heaters that rely on a storage tank, these models heat water on-demand as it passes through the unit. This means you can easily adjust the temperature to your liking, ensuring customized comfort every time you use hot water.

High Flow Rate for Simultaneous Appliance Use

Another important factor to consider when choosing a tankless water heater is its flow rate. The best models deliver a high flow rate, allowing you to meet the demands of multiple appliances simultaneously without compromising performance. Whether you’re running a shower while someone else is using the dishwasher or washing machine, a top-rated tankless water heater ensures an uninterrupted supply of hot water.

Quiet Operation with Minimal Noise

No one wants a noisy appliance disrupting their peace at home. That’s why the best tankless water heaters are designed to operate quietly with minimal noise during operation. With advanced technology and soundproofing measures in place, these units ensure that you can enjoy hot showers or run appliances without any unnecessary distractions.

In addition to these standout features, it’s worth considering other factors such as energy efficiency, size and installation requirements, durability, and ease of use when evaluating different tankless water heater options.

To give you a better idea of what to expect from the best tankless water heaters, here are some pros and cons:


  • Precise temperature control allows for customized comfort.
  • High flow rate meets simultaneous appliance demands.
  • Quiet operation ensures minimal noise disruption.
  • Energy-efficient design helps save on utility bills.
  • Compact size and flexible installation options.


  • Higher upfront cost compared to traditional water heaters.
  • Initial installation may require professional assistance.
  • Limited hot water output if usage exceeds the unit’s capacity.

It’s important to note that the pros outweigh the cons for many homeowners, especially those looking for long-term energy savings and convenience.

Customers have been raving about the recommended tankless water heater, praising its reliability and durability. With this model, users can rest assured that they are investing in a long-lasting and dependable appliance.

One of the standout features that customers appreciate is the energy savings achieved with this tankless water heater. By only heating water on demand, it eliminates the need for a traditional storage tank that constantly consumes energy to keep the water hot. This not only reduces utility bills but also contributes to a more eco-friendly household.

Positive reviews highlight the consistent delivery of hot water without any fluctuations. Customers are impressed by how quickly and efficiently this tankless water heater heats up their water supply, ensuring a steady stream of hot water whenever they need it. Whether it’s for a relaxing shower or doing dishes, this appliance delivers reliable performance every time.

In addition to its exceptional performance, customers value the excellent customer service provided by the manufacturer. The reviews team is quick to respond to inquiries and concerns, ensuring that customers feel supported throughout their ownership experience. This level of customer care adds an extra layer of satisfaction for those who choose this particular tankless water heater.

Another aspect that sets this model apart from others on the market is its impressive warranty coverage. With both a lifetime warranty on certain components and a generous year warranty overall, customers can feel confident in their purchase knowing that they are protected against any potential issues or defects.

Furthermore, users appreciate the compact design of this tankless water heater. Its small size allows for easy installation in tight spaces such as closets or utility rooms without taking up valuable square footage. This makes it an ideal option for homeowners with limited space who still want to enjoy all the benefits of a tankless system.

While overwhelmingly positive, there were some minor drawbacks mentioned in customer reviews as well. Some users found that adjusting temperature settings could be slightly challenging due to complex controls. However, once they became familiar with the system, this issue was easily overcome.

Making an Informed Decision for Your Water Heating Needs

There are several factors you should consider to ensure you make an informed decision that meets your hot water needs. Let’s dive into the key points you should keep in mind:

Hot Water Usage Patterns

To determine the right tankless water heater for your household, it’s essential to take into account your hot water usage patterns. Consider how many people live in your home and their typical hot water habits. Do you have multiple bathrooms or appliances that require hot water simultaneously? Understanding your usage patterns will help you choose a unit with the appropriate heating capacity and flow rate.

Fuel Type Availability

Another crucial factor is the fuel type available in your area. Tankless water heaters can be powered by natural gas or electricity. Natural gas models tend to provide higher flow rates and are more energy-efficient, making them ideal for larger households with high hot water demands. On the other hand, electric tankless water heaters are often smaller and easier to install, making them suitable for smaller homes or regions without access to natural gas.

Required Flow Rate and Temperature Rise

The required flow rate and temperature rise are significant considerations when selecting a tankless water heater. The flow rate refers to the amount of hot water needed per minute, while the temperature rise is the difference between the incoming cold water temperature and the desired hot water temperature. By evaluating these factors, you can ensure that the tankless water heater you choose can meet your specific needs.

Energy Efficiency

One of the primary advantages of tankless water heaters is their energy efficiency compared to traditional storage tanks. Tankless units only heat water as needed, eliminating standby heat loss commonly found in conventional systems. This improved efficiency can result in significant energy savings over time, reducing your monthly utility bills.

Installation Requirements

Before purchasing a tankless water heater, it’s important to consider the installation requirements. Tankless units often require specific venting systems and electrical or gas connections, so it’s crucial to ensure your home meets these requirements before making a purchase. Some models may require professional installation, while others can be installed as a DIY project.

Maintenance and Longevity

Tankless water heaters generally require less maintenance than traditional storage tanks. However, it’s still important to perform regular maintenance tasks such as flushing the system to remove mineral buildup. Tankless units typically have a longer lifespan compared to storage tanks, which can provide peace of mind in terms of long-term durability.

Final Thoughts on the Benefits of Tankless Water Heaters

In conclusion, tankless water heaters offer a range of benefits that make them a worthy investment for your home. By providing hot water on demand, these units eliminate the need for a storage tank and ensure you never run out of hot water again. With their compact size and wall-mounted installation, they also save valuable space in your utility room. Tankless water heaters are energy-efficient, helping you reduce your carbon footprint and lower your monthly utility bills.

But perhaps the most significant advantage of tankless water heaters is their longevity. Unlike traditional storage tank models that typically last 10-15 years, tankless units can last up to 20 years or more with proper maintenance. This means fewer replacements and less hassle over time.

Make the switch to a tankless water heater today and experience the convenience, efficiency, and durability they offer. Say goodbye to cold showers and hello to endless hot water whenever you need it!



What size tankless water heater do I need for my home?

The size of the tankless water heater you need depends on several factors including the number of bathrooms in your home, peak hot water demand, and incoming groundwater temperature. It’s best to consult with a professional plumber who can assess your specific needs and recommend an appropriate unit.

Are tankless water heaters more expensive than storage tanks?

While the upfront cost of a tankless water heater may be higher compared to a traditional storage tank model, they can save you money in the long run due to their energy efficiency and longer lifespan.

Can I install a tankless water heater myself?

It is recommended to have a licensed plumber install your tankless water heater to ensure proper installation and compliance with local building codes.

Do I need to perform regular maintenance on my tankless water heater?

Yes, regular maintenance is necessary for optimal performance and longevity of your tankless water heater. This includes flushing the system to remove mineral deposits and checking for any signs of wear or damage.

Will a tankless water heater work during a power outage?

Most tankless water heaters require electricity to operate, so they will not provide hot water during a power outage. However, some models come with battery backup options that can keep them running temporarily in case of an outage.

Tankless Water Heater Reviews: 2023's Top 6 Picks

Discover the top 6 tankless water heaters for 2023. Read our expert reviews to find the perfect one for your needs.