Top 10 Best High Efficiency Water Heaters To Buy On Amazon

When looking for the best high efficiency water heaters, you will find many different factors you need to look out for. You will want to make sure that you find a product that is high quality and that works well. Most of the time, you figure out what you want and spend hours researching and reading reviews until you're so sleepy you can hardly think straight, which is no way to choose anything. I'm here to help.

Here, we will list the highest-rated and most popular high efficiency water heaters products from popular USA brands. We will also explain the advantages and disadvantages of using this product to understand better which ones are right for you. We'll tell you about the features to look for, give you a list of what we think are the top 10, and then explain in detail why we picked them.

We choose based on

After months of researching, we took meticulous notes on the product review. We scored them all according to the same rubric to determine which models stood out at the top across the board and which models were simply not the best to recommend to a friend. Below, we discuss each factor we utilized in evaluating these products and touch on the performances these kits provided. We have selected our top picks based on expert recommendations:

  • Price
  • Warranties
  • Types
  • Specifications
  • Durability
  • Quality
  • Materials
  • Size
  • Brand value
  • Features
  • Style
  • Design
  • Longevity
  • Consumer ratings & reviews

Our #1 high efficiency water heaters Choice & Comparison Table

# Preview Product Score
1 Rheem Prestige High Efficiency 9.5GPM Indoor Natural Gas Tankless Water Heater

Rheem Prestige High Efficiency 9.5GPM Indoor Natural Gas Tankless Water Heater

9.5
2 Rheem Prestige High Efficiency 6.8GPM Indoor Liquid Propane Tankless Water Heater

Rheem Prestige High Efficiency 6.8GPM Indoor Liquid Propane Tankless Water Heater

9.2
3 Takagi T-H3-DV-N Condensing High Efficiency Natural Gas Indoor Tankless Water Heater, 10-Gallon Per Minute, 199,000 BTU

Takagi T-H3-DV-N Condensing High Efficiency Natural Gas Indoor Tankless Water Heater, 10-Gallon Per...

9.8
4 Rinnai RSC199iN Smart-Circ Condensing Gas Tankless Water Heater, Super High Efficiency Plus Natural Gas Water Heater, Up to 11 GPM, Indoor Installation, 199,000 BTU

Rinnai RSC199iN Smart-Circ Condensing Gas Tankless Water Heater, Super High Efficiency Plus Natural...

9.2
5 Rheem RTGH-68DVLN-2 Professional Prestige Series: 6.8 GPM High Efficiency Condensing Tankless Water Heater, Gray

Rheem RTGH-68DVLN-2 Professional Prestige Series: 6.8 GPM High Efficiency Condensing Tankless Water...

9.4
6 Rinnai RUCS65IN Tankless Hot Water Heater, 6.5 GPM, Natural Gas, Indoor Installation

Rinnai RUCS65IN Tankless Hot Water Heater, 6.5 GPM, Natural Gas, Indoor Installation

9.5
7 Tankless Water Heater Natural Gas, Camplux High Efficiency Natural Gas Tankless Water Heater with Fahrenheit Digital Display, 3.18 GPM On Demand Water Heater for 2-3 Persons Bathroom Indoor Use,White

Tankless Water Heater Natural Gas, Camplux High Efficiency Natural Gas Tankless Water Heater with...

9.8
8 Rheem Prestige High Efficiency 9.5GPM Outdoor Natural Gas Tankless Water Heater

Rheem Prestige High Efficiency 9.5GPM Outdoor Natural Gas Tankless Water Heater

9.3
9 Rinnai RSC199iP Smart-Circ Condensing Gas Tankless Water Heater, Super High Efficiency Plus Propane Heater, Up to 11 GPM, Indoor Installation, 199,000 BTU

Rinnai RSC199iP Smart-Circ Condensing Gas Tankless Water Heater, Super High Efficiency Plus Propane...

9.4
10 Takagi T-H3S-DV-N Condensing High Efficiency Natural Gas Indoor Tankless Water Heater, 8-Gallon Per Minute

Takagi T-H3S-DV-N Condensing High Efficiency Natural Gas Indoor Tankless Water Heater, 8-Gallon Per...

9.8

Contents

Best high efficiency water heaters Reviews: Best Overall List

It's fun to see how different people with different personalities have different preferences regarding their product choice. Some are obsessed with chasing and fetching balls, while others couldn't care less.

Some are driven by food or treats, and others just like to explore anything they can get their footstep on. By having a deep market analysis and user reviews with different interests and personalities, we found trends in which high efficiency water heaters are the most popular, most interesting, and stimulating for different temperaments.

Here is the helpful guide & list of recommendation for you to choose.

SaleBestseller No. 1

Rheem Prestige High Efficiency 9.5GPM Indoor Natural Gas Tankless Water Heater

  • Exclusive Water Savings technology conserving up to 1, 100 gallons per year
  • 199, 900 BTU (gas consumed per hour)
  • Exclusive Hot Start Programming minimizes cold water burst by staying in ready-fire state
  • Recirculation pump ready kit ready
  • For use indoor only
Bestseller No. 2

Rheem Prestige High Efficiency 6.8GPM Indoor Liquid Propane Tankless Water Heater

  • Exclusive Water Savings technology conserving up to 1, 100 gallons per year
  • 120, 000 BTU (gas consumed per hour)
  • Exclusive Hot Start Programming minimizes cold water burst by staying in ready-fire state
  • Recirculation pump ready kit ready
  • For use indoor only
Bestseller No. 3

Takagi T-H3-DV-N Condensing High Efficiency Natural Gas Indoor Tankless Water Heater, 10-Gallon Per Minute, 199,000 BTU

  • Endless hot water, On-demand usage, Compact, Space saving, Energy conservation
  • Computerized safety features, No pilot light to have to worry about
  • Safety features include freeze, overheat, surge protection, and troubleshooting diagnostic codes
  • Satisfies the 2012 SCAQMD Rule 1146.2 for Ultra-Low NOx Emissions
  • Primary heat exchanger utilizes commercial-grade copper alloy for 25 times better heat transfer than stainless steel, Integrated controls and power cord as standard features
Bestseller No. 4

Rinnai RSC199iN Smart-Circ Condensing Gas Tankless Water Heater, Super High Efficiency Plus Natural Gas Water Heater, Up to 11 GPM, Indoor Installation, 199,000 BTU

  • Smart-Circ Intelligent Recirculation: This tankless hot water heater features Smart-Circ technology that learns your water usage patterns, then schedules pump and recirucation accordinlgy for superior energy efficiency and convenience
  • Never Run Out of Hot Water with this Compact Tankless Gas Water Heater: This indoor condensing tankless hot water heater from Rinnai is only the size of a small suitcase, but provides up to 11 GPM (7 fixtures at once)
  • Smart, Durable Design: With multiple venting options, water heater fits a wide array of spaces; Includes 15-, 5-, and 1-year residential guarantee for heat exchanger, labor, and parts, respectively; See Controlr module for WiFi control (not included)
  • Professional Installation Recommended: Visit the Find a Rinnai PRO page on our website to locate a qualified technician in your area to install your tankless water heater; We do not recommend installing a water heater without a technician
  • Find Your Rinnai: See our product guides, manuals, energy guide, warranty information, videos, and tables to find the right tankless water heater for your home; Check our Ground Water Temperature Map to see if this heater is optimal for your region
Bestseller No. 5

Rheem RTGH-68DVLN-2 Professional Prestige Series: 6.8 GPM High Efficiency Condensing Tankless Water Heater, Gray

  • Exclusive Water Savings technology conserving up to 1, 100 gallons per year
  • 120, 000 BTU (gas consumed per hour)
  • Exclusive Hot Start Programming minimizes cold water burst by staying in ready-fire state
  • Recirculation pump ready kit ready
  • For use indoor only
Bestseller No. 6

Rinnai RUCS65IN Tankless Hot Water Heater, 6.5 GPM, Natural Gas, Indoor Installation

  • Endless Hot Water: Enjoy unlimited hot water flow throughout the house; compact, durable, and easy to install; professional installation recommended
  • Energy and Space Efficient: Space-saving design conserves energy as it heats only when necessary
  • Optimal Water Pressure: High-performance 6.5 GPM hot water flow rate for a powerful, constant stream
  • Multiple venting options available including PVC/CPVC using the Ubbink Concentric to Twin Pipe adaptor allow for an easy installation
  • Guaranteed to Last: 12-, 5-, and 1-year residential factory warranty for heat exchanger, parts, and labor respectively
SaleBestseller No. 7

Tankless Water Heater Natural Gas, Camplux High Efficiency Natural Gas Tankless Water Heater with Fahrenheit Digital Display, 3.18 GPM On Demand Water Heater for 2-3 Persons Bathroom Indoor Use,White

  • 3.18 GPM Instant Constant Water Heater -Camplux 3.18 GPM tankless water heater natural gas delivers 3.18 gallons per minute of on-demand endless hot water ensures constant comfortable instant hot water for 2-3 persons whole house. 3.18-GPM heater is activated by water flow rather than water pressure; Minimum activation water capacity rate: 0.65 GPM-4.8 GPM; Maximum input rating: 82,000 BTUs; Water connection location/size: Bottom/0.5-inch NPT.
  • Convenient, Easy Installation -The tankless water heater uses standard 1/2" BSP water fitting and gas inlet. The water heater comes with1/2 " BSP female to 1/2" NPT male gas connector adapter then you want hook this water heater to natural gas pipe directly.It also comes with 2.3" horizontal vent pipe,ensures efficient power ventilation. You can take Camplux customized wall thimble-WT236 for perfect indoor use.
  • Modern Design,Easy Operation -Trendy and modern design with unique white glassy front panel,easy to control the water temperature with LED touchscreen (Fahrenheit and Celsius switch optional).The compact size on demand water heater saves more space than traditional tanks.
  • Outstanding Features- The Camplux tankless gas water heater comes with oxgen-free copper heat exchanger and v-type stainless steel burner,high heating efficiency up to 89.98 %; 90°wind isolation design, this tankless natural gas water heater can anti backflow wind in high floors, the S/S 2.36 ” vent pipe exhaust harmful gases quickly.
  • 6-In-1 Protection Ensure Your Safety- Dry combustion,flame failure device, anti-freezing protection, over heating protection to ensure your safety. Fully automatic temperature controls with an energy saving mode and child lock technology.
SaleBestseller No. 8

Rheem Prestige High Efficiency 9.5GPM Outdoor Natural Gas Tankless Water Heater

  • Exclusive Water Savings technology conserving up to 1, 100 gallons per year
  • 199, 900 BTU (gas consumed per hour)
  • Exclusive Hot Start Programming minimizes cold water burst by staying in ready-fire state
  • Recirculation pump ready kit ready
  • For use outdoors with freeze protection up to -30 degrees
Bestseller No. 9

Rinnai RSC199iP Smart-Circ Condensing Gas Tankless Water Heater, Super High Efficiency Plus Propane Heater, Up to 11 GPM, Indoor Installation, 199,000 BTU

  • Smart-Circ Intelligent Recirculation: This tankless hot water heater features Smart-Circ technology that learns your water usage patterns, then schedules pump and recirucation accordinlgy for superior energy efficiency and convenience
  • Never Run Out of Hot Water with this Compact Tankless Gas Water Heater: This indoor condensing tankless hot water heater from Rinnai is only the size of a small suitcase, but provides up to 11 GPM (7 fixtures at once)
  • Smart, Durable Design: With multiple venting options, water heater fits a wide array of spaces; Includes 15-, 5-, and 1-year residential guarantee for heat exchanger, labor, and parts, respectively; See Controlr module for WiFi control (not included)
  • Professional Installation Recommended: Visit the Find a Rinnai PRO page on our website to locate a qualified technician in your area to install your tankless water heater; We do not recommend installing a water heater without a technician
  • Find Your Rinnai: See our product guides, manuals, energy guide, warranty information, videos, and tables to find the right tankless water heater for your home; Check our Ground Water Temperature Map to see if this heater is optimal for your region
Bestseller No. 10

Takagi T-H3S-DV-N Condensing High Efficiency Natural Gas Indoor Tankless Water Heater, 8-Gallon Per Minute

  • Endless hot water, On-demand usage, Compact, Space saving, Energy conservation
  • Computerized safety features, No pilot light to have to worry about
  • Satisfies the 2012 SCAQMD Rule 1146.2 for Ultra-Low NOx Emissions
  • Dimension:22.5"H x 17.75"W x 10.75"D

Best high efficiency water heaters Buying Guide

You don't need to spend a lot of money to get a good quality high efficiency water heaters, but it's worth spending a little extra to get something better. If you're buying a cheap product, there's no guarantee that it will last as long or perform as well as an expensive one. Some cheaper products are made with lower quality materials that can break more easily or wear out quicker than those made with better quality materials. So how do you know if a product is of high quality or not?

Here are some things to look out for:

  1. Check the brand name and reputation
  2. Look at customer reviews and ratings
  3. Look at how long the warranty lasts and what it covers
  4. How many years have they been making this product?

Price

An high efficiency water heaters always comes at a price. If you want quality and longevity, then you have to be willing to spend more than what people usually spend on their products. You need to know that there is no free lunch in this world. What is good, will come with its own cost. So, the price of an item should not be the only factor in your decision-making process.

Quality

Quality is another important thing that you should look out for when buying high efficiency water heaters. It would be advisable for you to ensure that whatever item that you buy does not break down easily before its time or even worse after its time! The quality of any product must also be good enough to give it an edge over competing brands in terms of durability and longevity.

Check the product’s reviews

You can find reviews on most major retail websites like Amazon. These will give you an idea of what other people think about the high efficiency water heaters, including any problems they have had with it or things that could have been done better.

Look for a warranty

If you’re buying something expensive, it’s important to find out if there is a warranty on the product or not. This will give you peace of mind that if anything goes wrong with your purchase, you won’t have to fork out money to get it fixed or replaced.

Brand name

You can tell the quality of high efficiency water heaters by its brand name. If a company has been in business for a long time and has been making products for many years, then it must be doing something right! So when buying any type of product, look for well-known brands and companies who have been around since day one! They are sure to have some great products that will last you for years!

Do your research

The first thing that you need to do when looking for a high efficiency water heaters is to conduct research on different brands and their features so that you can narrow down your choices. This will enable you to identify what type of product suits your needs and preferences perfectly so that you do not have any regrets at the end of the day when using it in real-life situations.

 

 

Benefits of high efficiency water heaters?

The most important thing to consider when buying a high efficiency water heaters is its benefits. The best products offer you the best value for your money and the ones that will save you time and effort. There are many benefits of using the best high efficiency water heaters.  Before making a purchase, it is important that you understand the benefits of the high efficiency water heaters so that you can get the best deal possible. 

Here are some of the most important benefits of high efficiency water heaters:

  • The first benefit is that it will make your life easier.
  • Over time, high efficiency water heaters will save you significant money.
  • It is durable and can last for a long time.
  • It improves performance in a variety of ways.
  • Made from high-quality materials that are sturdy and reliable.
  • It simplifies the process of working. 
  • Simple and intuitive design makes them easy to use.
  • Longer-lasting and more effective
  • It's worth your money.
  • Offers professional services.
  • Maintaining or repairing it takes less time and energy. 
  • Guaranteed quality.
  • A greater sense of safety for health.

 

Rate this post
About Tom

Tom is a blogger and artist who also loves technology. He spends his days blogging about the latest developments in the world of art, and he enjoys sharing his thoughts with readers on what it means to be an artist today. Tom has always been interested in technology - but it wasn't until he was 13 years old that he discovered how much fun making websites could be! Tom is a fun-loving, adventure seeking creative type. He enjoys reviewing art products and technology gadgets on his blog and has been doing so for over 5 years now! He spends most of his time in the studio, at the beach, or out exploring new places.

Leave a Comment