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Best Tankless Water Heaters 2020: Comparisons & AI Consumer Report

After evaluating and analyzing in detail more than 10,122 customer satisfaction about Best Tankless Water Heaters, we have come up with the top 20 products you may be interested in Best Tankless Water Heaters. We have ranked the best brands from Artificial Intelligent and Big Data, as you see below: Rinnai, Stiebel Eltron, Rheem, GIRARD, TAKAGI, Eccotemp, Bosch Thermotechnology, EcoSmart, CAMPLUX ENJOY OUTDOOR LIFE, FORUEE PERFRCT COMFORT FOR FAMILY. Read more How we Score

Compare

TOP Choice
1
Rinnai RU199iN Sensei Super High Efficiency Tankless Water Heater, 11 GPM - Natural Gas: Indoor Installation
9.3
AI Score

The scores from 0 to 10 are automatically scored by our AI Consumer Report tool based upon the data collected. This score has no relationship or impact from any manufacturer or sales agent websites. Read more How we Score

Most Saving
2
Stiebel Eltron Tankless Water Heater – Tempra 24 Plus – Electric, On Demand Hot Water, Eco, White
9.2
AI Score

The scores from 0 to 10 are automatically scored by our AI Consumer Report tool based upon the data collected. This score has no relationship or impact from any manufacturer or sales agent websites. Read more How we Score

3
Rinnai RUC98iN Ultra Series Indoor Natural Gas Tankless Water Heater, Twin Pipe
9.0
AI Score

The scores from 0 to 10 are automatically scored by our AI Consumer Report tool based upon the data collected. This score has no relationship or impact from any manufacturer or sales agent websites. Read more How we Score

4
Rinnai V65eN Tankless Hot Water Heater, Large
8.8
AI Score

The scores from 0 to 10 are automatically scored by our AI Consumer Report tool based upon the data collected. This score has no relationship or impact from any manufacturer or sales agent websites. Read more How we Score

5
Rinnai V65IN Tankless Water Heater, Large, V65iN-Natural Gas/6.5 GPM
8.8
AI Score

The scores from 0 to 10 are automatically scored by our AI Consumer Report tool based upon the data collected. This score has no relationship or impact from any manufacturer or sales agent websites. Read more How we Score

6
Rheem 240V 2 Heating Chambers RTEX-18 Residential Tankless Water Heater, small, GREY
8.8
AI Score

The scores from 0 to 10 are automatically scored by our AI Consumer Report tool based upon the data collected. This score has no relationship or impact from any manufacturer or sales agent websites. Read more How we Score

7
Girard 2GWHAM On-Demand Tankless Water Heater
8.8
AI Score

The scores from 0 to 10 are automatically scored by our AI Consumer Report tool based upon the data collected. This score has no relationship or impact from any manufacturer or sales agent websites. Read more How we Score

8
Rinnai RL94IN, 9.4 GPM, RL94iN-Natural Gas/ 9.4 GPM
8.8
AI Score

The scores from 0 to 10 are automatically scored by our AI Consumer Report tool based upon the data collected. This score has no relationship or impact from any manufacturer or sales agent websites. Read more How we Score

9
Takagi T-H3-DV-N Condensing High Efficiency Natural Gas Indoor Tankless Water Heater, 10-Gallon Per Minute, 199,000 BTU
8.8
AI Score

The scores from 0 to 10 are automatically scored by our AI Consumer Report tool based upon the data collected. This score has no relationship or impact from any manufacturer or sales agent websites. Read more How we Score

10
Eccotemp fvi12-NG FVI-12 Natural Gas, 3.5 GPM, High Capacity Tankless Water Heater, White
8.8
AI Score

The scores from 0 to 10 are automatically scored by our AI Consumer Report tool based upon the data collected. This score has no relationship or impact from any manufacturer or sales agent websites. Read more How we Score

11
Bosch Electric Mini-Tank Water Heater Tronic 3000 T 4-Gallon (ES4) - Eliminate Time for Hot Water - Shelf, Wall or Floor Mounted
8.8
AI Score

The scores from 0 to 10 are automatically scored by our AI Consumer Report tool based upon the data collected. This score has no relationship or impact from any manufacturer or sales agent websites. Read more How we Score

12
Rheem RTEX-24 24kW 240V Electric Tankless Water Heater, Gray
8.8
AI Score

The scores from 0 to 10 are automatically scored by our AI Consumer Report tool based upon the data collected. This score has no relationship or impact from any manufacturer or sales agent websites. Read more How we Score

13
EcoSmart ECO 27 Electric Tankless Water Heater, 27 KW at 240 Volts, 112.5 Amps with Patented Self Modulating Technology,White
8.8
AI Score

The scores from 0 to 10 are automatically scored by our AI Consumer Report tool based upon the data collected. This score has no relationship or impact from any manufacturer or sales agent websites. Read more How we Score

14
Rinnai V65IP Tankless Water Heater, Large, V65iP-Propane/6.5 GPM
8.8
AI Score

The scores from 0 to 10 are automatically scored by our AI Consumer Report tool based upon the data collected. This score has no relationship or impact from any manufacturer or sales agent websites. Read more How we Score

15
EcoSmart ECO 11 Electric Tankless Water Heater, 13KW at 240 Volts with Patented Self Modulating Technology
8.6
AI Score

The scores from 0 to 10 are automatically scored by our AI Consumer Report tool based upon the data collected. This score has no relationship or impact from any manufacturer or sales agent websites. Read more How we Score

16
Rinnai RL Series HE+ Tankless Hot Water Heater: Indoor Installation
8.4
AI Score

The scores from 0 to 10 are automatically scored by our AI Consumer Report tool based upon the data collected. This score has no relationship or impact from any manufacturer or sales agent websites. Read more How we Score

17
Ecosmart ECO 36 36kw 240V Electric Tankless Water Heater
8.4
AI Score

The scores from 0 to 10 are automatically scored by our AI Consumer Report tool based upon the data collected. This score has no relationship or impact from any manufacturer or sales agent websites. Read more How we Score

18
Camplux 2.64 GPM Residential Indoor Tankless Water Heater,On-Demand Instant Water Heater with Fahrenheit Digital Display, Liquefied Propane Gas Water Heater for Small Homes, Apartments Use,Black
8.0
AI Score

The scores from 0 to 10 are automatically scored by our AI Consumer Report tool based upon the data collected. This score has no relationship or impact from any manufacturer or sales agent websites. Read more How we Score

19
Rinnai RLX94iN HE + Tankless Water Heater, Natural Gas, Indoor Installation,n/a,Large
7.8
AI Score

The scores from 0 to 10 are automatically scored by our AI Consumer Report tool based upon the data collected. This score has no relationship or impact from any manufacturer or sales agent websites. Read more How we Score

20
Tankless Water Heater Propane Shower, 2.64GPM/10Litre Capacity, 6-IN-1 Multiple Protection, 7 More Usage Scenarios, Low Pressure Startup, Black
7.8
AI Score

The scores from 0 to 10 are automatically scored by our AI Consumer Report tool based upon the data collected. This score has no relationship or impact from any manufacturer or sales agent websites. Read more How we Score

Last update on 2021-10-16 / Affiliate links / Images, Product Titles, and Product Highlights from Amazon Product Advertising API

5
3 ratings

Introduction

Imagine that you are in a hot shower after a long tiring working day amid a freezing cold winter, thinking that nothing can ruin this marvelous relaxing moment, but all of sudden...Oops! The stream turns into freaking cold because your heater has run out of hot water. If you don’t want this nightmare coming to life, go buy a tankless water heater. Keep scrolling down and you can find out the best tankless water heaters according to our editors’ choice.


Types

Tankless water heaters, also known as on-demand or instant water heaters, use high-powered burners to rapidly heat water as it runs through a heat exchanger and deliver it directly to your faucets or shower without storing it in a tank. Therefore, unlike models with tanks, tankless heaters do not require waiting time for preparing hot water. 

There are 3 types of tankless water heaters using different energies which are electricity, natural gas, and propane. Each type has its own advantages and disadvantages.

1. The best electric tankless water heater

Ecosmart ECO 18 Electric Tankless Water Heater is the first choice when it comes to electric water heaters. EcoSmart ECO 18 is an 18-kilowatt heater that can deliver between 1.8 and 4.3 gallons-per-minute depending on the inlet temperature. Therefore, it’s ideal for providing endless hot water for apartments, condominiums, and other whole-home applications, while at the same time significantly saving space, time, money, and energy. Similar to other EcoSmart’s models, EcoSmart ECO 18 features the most advanced self-modulating technology which allows the heater to use the exact amount of energy needed to heat water. 

2. The best natural gas tankless water heater

In comparison with electric systems, gas tankless water heaters are capable of delivering more hot water (over 8 GPM). If you’re considering buying a new gas water heater for your loving home, why don’t you choose Rinnai RU199iN Natural Gas Water Heater? You will no longer have to choose between taking a piping hot shower, doing a load of laundry, or running the dishwasher with the Rinnai RU199iN. Moreover, Circ-Logic technology featured in this model allows you to set recirculation patterns that coincide with your typical habits.

3. The best propane tankless water heater

For people living in areas outside of major metropolitan centers, propane may be the best option to replace natural gas. Among numerous products available on the market, we highly recommend Rinnai V65IP Tankless Water Heater.

 It is the best propane tankless water heater that you can buy with the budget under $1000. This powerful heater ensures to provide endless hot water for your entire home (10,300 BTU-Minimum/ 150,000 BTU-Maximum). You can also remotely control the system with the Control-R 2.0 mobile app. Moreover, all Rinnai’s products have an average life expectancy up to 20 years compared to 8-10 years of traditional heaters, so Rinnai V65IP Tankless Water Heater can stay with you for a really long time.


Buying guide

The flow rate and energy consumption are important factors that you should initially pay attention to before purchasing a tankless water heater.

1. Flow rate

Basically, the flow rate, measured by Gallons-per-Minute or GPM, refers to the amount of water coming out of your faucet in a certain amount of time. The water flow rate depends on various factors, but the first thing is your household size.

A bathroom faucet with low-flow is estimated at 0.5-1.5 GPM, while a kitchen faucet could be anywhere from 3.0-7.0 GPM.

If you notice that hot water isn’t reaching your faucet as quickly as you would like, you can add a circulation system to the heat source. Depending on the tankless model you choose, it may already be designed for a circulation system add-on with no reconfiguring piping or buffer tank needed

2. Energy efficiency

You may not know that on-demand water heaters can be 24%–34% and 8%–14% more energy-efficient than conventional tank water heaters, for homes that use less than 41 gallons and around 86 gallons, which means a lot of hot water per day, respectively. Besides, You can achieve even greater energy savings of 27%–50% if you install a demand water heater at each hot water outlet. 

Tankless water heaters in general can avoid the standby heat losses associated with storage water heaters. However, gas-fired tankless water heaters tend to waste more energy than electric ones if they have a constantly burning pilot light. That’s why you’d better purchase a model that uses a standing pilot light or an intermittent ignition device (IID).

Read more:


FAQs

1. How much can a tankless water heater cost?

A tankless water heater is one way to ensure that you never again experience any unexpected cold showers. However, these devices don’t come cheap: the average cost of a tankless water heater, with installation, is approximately $3,000. The total cost depends on the model chosen and whether your home requires retrofitting. However, electric models are often cheaper than gas and propane ones. 

2. What is the main difference between the tank and tankless water heaters?

The main difference between these two models is that one requires a tank to store and heat water (30 - 120 gallons) while the other doesn’t. Besides, there is a huge difference in energy-saving and installation when comparing conventional tanks to tankless models. 

3. How to clean a tankless water heater?

In order to flush out your water heater in general and tankless one in particular, you need to follow the following steps:

  • Turn off the heater

  • Close the gas valve/electric source

  • Close the cold water valve

  • Turn on the hot water tap of the sink

  • Open the pressure release valve

  • Connect the garden hose to the drainage spigot

  • Turn the spigot and drain the hot water out

  • Close the spigot turn on the cold water valve

  • Open the spigot and flush out the water

  • Keep repeating the process until the water is clean

4. Are natural gas and propane the same? 

Absolutely no! Natural gas and propane are two different types of burning fuels. Natural gas is a fossil fuel that is extracted from the ground, while propane is extracted from crude oil and petroleum gas during their refinement processes. Therefore, propane is pricier than natural gas.


Final thoughts

Don’t want to experience a sudden cold shower ever again? Go buy a tankless water heater! If you haven’t made the decision yet, here are the best tankless water heaters for your consideration: 

  • The best electric tankless water heater: Ecosmart ECO 18 Electric Tankless Water Heater is given the point of 4.3 / 5.0 by nearly 2500 purchasers on Amazon. With advanced features like the self-modulating technology,  It deserves to be the star within its kind.

  • The best natural gas tankless water heater: Rinnai RU199iN Natural Gas Water Heater will not make you disappointed with the impressive performance and longevity. That’s why it has won the point of 4.6 / 5.0 on Amazon with ease. 

  • The best propane tankless water heater: Rinnai V65IP Tankless Water Heater is the best choice for people living in rural areas where the gas supply is insufficient. It has received nearly 85% of positive feedback on the Amazon website for its affordable price and great performance.

Hope that this article has informed you sufficiently and can help you find out the best tankless water heater for your place.

ProductUpdates Team
ProductUpdates Team
AI and Big Data are the core foundations of the revolution 4.0. Developing AI as well as Big Data is one of the decisive factors in the growth of technology companies. In our articles, we use AI to arrange and grade products as well as rank them through the reviews from the prime experts of ProductUpdates.
As you know, using Big Data in modern life has a positive impact on the quality of everyone's life. We believe that the data support tool of the ProductUpdates team will help consumers to have satisfaction from their buying decisions. And more, we will always be involved to help you make the best choices!

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