Best Tankless Water Heater 2020 | Our Top Picks and Buyer’s Guide

We took the time for you to discover the best tankless water heater available for you in 2020. We want to let you know that we have covered almost every small detail for you to help you with picking the perfect Tankless Water Heater. By every small detail, we mean how the best water heater looks like and what features you need to look after for a tankless water heater.

This will be the only ultimate resource guide that you need before selecting a Tankless Water Heater. Sounds Awesome Right? We hope that you would be happy after reading this. So without wasting time let’s just get started.

Well, Currently Water Heaters may be experiencing a shortage of popularity. All of that due to the current COVID-19 Situation we had. But when this all ends, do you know what time it’s going to be? Winter! Then there will be a time when water Heaters will rise again and experience the popularity that they deserve.

Just imagine having a hot shower in those breezing and freezing mornings of winter. All you need is a Water heater that will be ready to provide you steaming Hot water which when touches your body, feels like you are being kissed by the sun! So to provide you the pleasure that you need we are here to show you the work we did for you. Go on and find out the Best Tankless Water Heaters of 2020.

1.Rinnai V Series HE Tankless Hot Water Heater: Indoor Installation

Do you want to stop waiting for your hot water needs? especially in the wintertime, you may want to take a glimpse at the Rinnai tankless hot water heater. It is safe and most effective and for reasons like being a reliable hot water source on demand.

Features

Never Wait – Well, this water heater puts a full stop on waiting. This means that you don’t have to ever wait for the hot water to come out of the faucet. It just delivers hot water when you need. You can always use it simultaneously, take a shower or wash the dishes or do the laundry.

ThermaCirc360 technology and water savings – The technology that the Rinnai V Series HE Tankless uses is something modern. The ThermaCirc360 Feature recirculates hot water through the pipes which provide hot water whenever needed. Since it is a tankless water heater it also saves water by heating only the amount of water that is needed.

Occupies Less Space – Well it’s no secret that tankless water heaters occupy less space when compared to the regular water heaters. It is small but way more efficient when compared to other water heaters. It is way too small that it fits in your wardrobe and a small suitcase too. its installation is easier due to its smaller design.

Better Water Flow – This water heater offers 9.4 GPM of water flow rate, GPM stands for Gallons per minute. This makes this natural gas water heater the most powerful and effective tankless water heaters of our list.

Pros

  • ThermaCirc360 technology
  • No more wasting of water
  • Mobile application for remote control
  • Mobile and space-saving
  • Easy to install and use

Cons

  • Very Expensive
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2.Bosch Tronic 3000 T 7-Gallon Electric Mini-Tank Water Heater

This review would be incomplete without the Bosch Tronic 3000 water heater. If you don’t want to go out for the expensive models out there, this bosch water heater is the best one for you. It is cost-efficient and is a product of one of the best companies out there. But remember although it is economic, it has way more features to deliver than other water heaters.

Features

Compact Size – The Bosch Tronic 3000 T is the smallest water heater on our top 10 guides. Yes, it’s even smaller than the Takagi T-KJr2-IN-LP. This thing is so small that it can fit under a sink cabinet, wouldn’t that be amazing and super-cool. And, because it has an attractive, sleek, and modern design, this water heater will blend perfectly with your interior and kitchen surroundings.

Installation and Hassle-free Use – You can install this bosch water heater anywhere in your house, whether it may be indoors or outdoors, it’s up to you. The feature that attracts this heater is that unlike other models that require venting, this is a straight-on point model, which means that all that you need to do is to plug on and turn on the unit. In fact, all that you need to do to get it started is to fix into your cold water line and fix it directly – simple and without any complex hassles. With such ease-of-use, this model is best for your motor-garage, kitchen, basement wet bar, or bathrooms.

Reasonable Heating Capacity – According to our review this heater may be small, but its heating capacity is quite outstanding. It heats water at a temperature range of 18 to 62 degrees Celsius, which is sufficient for all needs in a common household. This water heater makes water flows through it at a rate of 7 gallons per minute, which is quite extraordinary. The 3000 T model is available in 2 variants which have 2.5 and 4-gallon capacities.

3.Eccotemp i12-NG Indoor tankless heater, 1/2 inch NPT water fittings

The Eccotemp i12-NG is the best tankless water heater which permits a point of use operation. It is versatile and has the best features compared to that of different tankless water heaters which supports it in reaching a 5star rating, It is compact too, This heater has a magnificent water flow of 3 gallons per minute, and it uses natural gas as averse to electricity making it the best choice to someone looking for a tankless water heater
Features

Automatic Temperature Control: When it comes to automatic temperature control, eccotemp i12-NG is one of the few available in the market. It doesn’t require any manual setting for temperatures. It automatically regulates the temperature of incoming underground water and modifies the heat, it heats the water-based on its flow so it is easy to operate, we just need to turn the heater on and the unit completes the task on its own

User-friendly Interface: The eecotemp i12-Ng heater has a touch-sensitive screen and an LCD display which indicates the flow rate and temperature of the water. When running at a flow of 3 gallons per minute its energy factor comes in at 79% with a temperature range of 35 to 40 degrees Fahrenheit, the flow rate reduces to about 1.5 gallons per minute when temperatures reach 77 degrees Fahrenheit.

Child Locking Technology: When the child lock is on there is no risk of mischance of children screwing up with eccotemp. It is safe and designed for all kinds of family’s including kids and elders

Pros

  • Power saving
  • Long power cord, line cord
  • Power exhaust ventilation
  • The strong gorilla glass casing

Cons

  • Expensive
  • Doesn’t reach the expectations in cold areas

4.RHEEM RTGH-95DVLN 9.5 GPM INDOOR DIRECT VENT TANKLESS NATURAL GAS WATER HEATER

The best tankless, energy-efficient water heater of the future is here. The “RTGH-95DVLN”, by Rheem. It is 94% energy efficient than other water heaters in the market!!! It works awesome at 8,400 feet above sea level. The one who has this product is the luckiest one.

Features:-


Water Flow Rate: This thing has a super high water flow rate of 9.5 gallons per minute – the of all known water heaters. This thing provides enough water for a hot showerbath, for dishwashing, and for laundry wash, all at the same time.

Troubleshooting: This water heater has got a well-functioned self-diagnostic system. It uses smart technology to warn about possible hazards and malfunctions in gas supply or venting. This advanced system makes sure that the device works properly and uninterruptedly.

Special-Functionality: The RTGH-95DVLN has a special functionality called EZ-Link Connectivity, which means you can connect two separate units and operate them as one unit which satisfies high demands of hot water in bigger households.

Pros

  • Remote control
  • Low emission
  • Premium design
  • Better flow rate
  • Easy installation

Cons

  • Costly

5.Takagi T-KJr2-IN-LP Indoor Tankless Water Heater, Propane

The Takagi T-KJr2-IN-LP is a medium-priced tankless water heater that is powered up by propane which comes with a maximum water flow rate of 6.6 gallons per minute. While the Takagi heater is not suitable for large needs, it is enough for a house that has two or three bathrooms. Now that’s a competing performance when compared amongst other high-end models such as the Rinnai RUC98iN which is high on price!

Features

AFR (air-fuel-ratio) Sensor -The Takagi T-KJr2-IN-LP comes loaded with an advanced sensor and thermistors to control the performance of the machine while reducing the emissions. These sensors produce an energy factor of up to 0.83, which is way more than that of tank water heaters which produce an energy factor of 0.7. So this means that you will be left with a lot of hot water in your home and a lot of money in your pockets and wallets.

Exhaust/Temperature Safety Control -This function guarantees that the Takagi T-KJr2-IN-LP internal components don’t freeze when the weather is cold, people usually face this problem when they haven’t used their heaters in a while during the winter season. And there’s an inbuilt surge protector that switches off your water heater when it overheats, this means that you are saving your energy bills by turning off the heater when not needed. Meantime, the dual thermostats let you decide the temperature to which the water heats. And the best part is that you get a comfortable remote with this model to perform all operations on the go without touching the heater.

Excellent Temperature Range -The Takagi T-KJr2-IN-LP will heat the water from 37 degrees Celsius (for home use) to 75 degrees Celsius for industrial use. Our opinion is that this model packs way more features for a unit of its size. It has a reasonable design tool, which allows you to attach it in tiny spaces. And, speaking of small, you will be amazed to know that the T-KJr2-IN-LP is the smallest tankless water heater ever produced by Takagi.

Pros

  • Solid, long-lasting design
  • Light-weight
  • Good water flow rate
  • Supports direct venting
  • affordable

Cons

  • The installation is quite complicated

6.Stiebel Eltron Tempra Plus

Reaching off our best water heater studies is this model by Stiebel. This is a high-end system and one of the most powerful tankless water heaters that you will ever see, it is an excellent pick if you live in regions where the temperatures of water flowing through the taps can be as low as 40 degrees Fahrenheit/3 degrees Celsius. It is an excellent choice if you’re searching for a heater with a high flow rate because this allows water to flow at a rate of up to 8 GPM which is quite high.

Features

Advanced Flow Technology -The Stiebel Eltron plugs a brand-exclusive technology that adjusts the rate of water flowing through it when it automatically detects that the need for water required is more than the heater can manage. Well, this means that you’ll constantly enjoy the hot water at a steady temperature, unlike most heaters that start producing hot water whenever the flow exceeds and this feature gives you an amazing shower experience.

Pure Thermostatic Temperature Control -The Eltron isn’t in our best water heater just for some ordinary reason. It is one of those few models that change power based on the temperature of the water that is coming in from the pipes and the water flow rate. It will change its power production according to the heating requirements of the incoming water to keep the aspired temperature of the water flowing out to your taps in the kitchen or showerhead in the bathroom.

Automatic Temperature Display -You’ll never have to think of the temperature at which the Eltron is heating water. It has a big display that shows you the temperature in a simple digital format. Also, it comes loaded with a great active dial selector that allows you to select the temperature of your water between 86 to 140 degrees Fahrenheit. This may be the perfect ideal water heater for your house for daily use. The only thing to check out is the price, it is way more expensive and heavy on your savings.

Pros

  • Outstanding performance
  • Energy saving
  • Automatic water flow rate

Cons

  • Highly expensive

7.Rheem RTG-64DVLN Tankless Natural Gas Water Heater

Here’s one more tankless water heater which has one of the highest ratings by its users, this time it is none other than Rheem. It works as an amazing substitute to the Rinnai RUC98iN if you don’t want to spend way more money on it. The RTG-64DVLN water heater is, however, less efficient and delivers less performance than the Rinnai RUC98iN so it is better suitable for small homes and bathrooms consisting of one or two showers.

Features

Remote Temperature Control -You should always consider this before buying a tankless water heater, the controlling of temperature of the heater must be easy and hassle-free. With the Rheem RTG-64DVLN, ’s amazing UMC-117 remote control, you can change the temperature by simply pressing a button. Now the best part is that this remote has an amazing range of 10 feet, which means that you control it very easily from any part of your home. Well the next time you think of hot water you may not need to leave the kitchen, all you need is to press the button from your kitchen and it will be ready.

Next Generation Burner Technology -This water heater is way too fast, it gives you steaming hot water in seconds so that you don’t have to wait for it. Other than that, it allows water to flow at a whopping rate of 6.8 gallons per minute when the temperature of the water is 35 degrees Fahrenheit. But the flow of water may decrease way down to 5.3 gallons per minute when the temperature of incoming water rises.

Concentric Venting -While concentric venting may not be a major highlight per se, it is worth noting that unlike most gas tankless water heaters, you don’t need an adapter with the Rheem RTG-64DVLN for ventilation. It uses a 3-inch by the 5-inch concentric vent. And the beauty of it is that the venting system has an integrated condensate collector, which makes it easy to maintain your water heater.

Benefits of a Tankless Water Heater

Do you know why we suggest people go for a tankless water heater? Because of the amount of money it can save you. You heard it right. By buying yourself the best tankless water heater you can cut down your utility bill up to 40% less. A tankless water heater will help you cut down energy bills as low as possible.

Now, this is not the only benefit of using a tankless water heater.

Infinite Hot water

By infinite hot water, we mean that you get hot water whenever you want. All you need is to push that button and enjoy steaming hot water in seconds. You can think of them as on-demand heaters, all you need to do is order!

Another major advantage of using them is that there is no loss of heat. By loss of heat we mean, these heaters only need energy when you want to heat the water. Other than that there is no energy used.

Unmatched Durability

Usually, a normal tankless water heater lasts 10-15 years. But when you go for higher and better-end models the lifetime may increase. So make sure that you buy the best tankless water heaters. The lifetime of a tankless water heater is way higher than the storage tank water heater.

Compact Design

This is the only main advantage of choosing a tankless water heater than a tank water heater. Tank water heaters are way bigger in size because the water heater needs a faucet to store the hot water. But tankless water heaters do not need a faucet as they provide hot water on demand by directly heating water whenever required. So tankless water heaters are small and mobile. Most of the tankless water heaters can be directly mounted on walls so they use as little space as possible.

Eco-Friendly

The best part about Gas tankless water heaters is that they have near-zero-emissions and are, therefore, safe for the environment. Most gas-powered water heaters use low NOx technology to keep emissions as low as possible. Even the electric tankless water heaters don’t generate any harmful greenhouse gas which may damage the ozone layer. Moreover, these water heaters come with new features to stop burning water from reaching your showerhead or faucet.

Hassle-free operation

You don’t need to be a rocket science expert to operate a tankless water heater. The toughest part of using these heaters is their installation. Once you’ve mounted the heater to the wall, all you need to do is to set the temperature according to your choice on the unit’s dial and you’re ready to go. You may even choose a model that supports remote control so that you can access it from any part of your house.

No Possibility of Flooding

Unlike storage tank water heaters, you will never have to worry about possible flooding caused by a disrupt tank. This makes one thing clear that tankless water heaters are safe for you and your home. But if you need more safety, some heaters come with an intelligent system that checks internal faults as they rise and gives you a warning in advance.

How Does a Tankless Water Heaters Work?

Well let us show you the most interesting part, how does a tankless water heater work. The reason why we want to let you know about this is that if you get to know how things work, you can get the best out of it. Tankless water heaters are modern and mobile. They do not require a faucet to store the hot water. Instead, they provide you hot water whenever required. All you need to do is to push the button and the heater starts to provide you hot water as soon as possible.

The Heat Exchanger

You must have heard the term heat exchanger before. They are widely used in cars and air-conditioners. The same heat exchangers are used in tankless water heaters. A heat exchanger is a device that transfers heat energy from one place to another. So when you activate the water heater by pushing the button, this in turn lets the water flow into the heat exchanger and lets out hot water through the shower or tap.

The Flow Time

Frequently Asked Questions

Is it Safe to Install a Tankless Water Heater in my Attic?

There are certain aspects that are required to be considered while installing a water heater. The place you are thinking about installing and the type of water heater you will prefer will be the significant matters that need to be looked after. Nowadays the tank-less models are the most privileging ones and the ones on the run. They are usually more convenient when it comes to calculating the weight and deciding its margin.


Selecting a place for installing the water heater is noteworthy. The position of the heater will be impacting the delivery of hot water. If the system is more complicated then there might be a risk for the water to get cooled while passing through the installation and you might feel disgusted for receiving cold water instead of hot water. Safety measures should also be a concern. For example, installing it in a place full of flammable substances will only make things worse.


It may be mind-boggling, but it is not at all a tough task to install it in the attic in case you completely have your mind on setting it there. There are indeed a lot of engaging benefits that cannot be missed out. These are:

  1. Remarkable savings: As per the energy government, the water heaters that are tank-less tend to be thirty-four percent more efficient than their standard counterparts. The appliance greater inefficiency will surely make a bill that is lower in utility as the heater will be making use of less fuel for making your showers hot.
  2. Ensured comfort: Getting a pleasant warm shower specifically in the Mediterranean regions is really a desire. Tank-less heaters are beneficial in providing immediate and uninterrupted steaming water throughout. Besides, you will never have to worry about getting depleted of hot water.
  3. Straightforward access: In most of our residences, the attic can easily be accessed and it is also concealed. Therefore it can make your work easy while monitoring for any feasible leaks as the professionals can effortlessly give a look to it.
  4. Efficient distribution of water: Most of the people who have installed their water heaters (tank-less) in their attic are quite satisfied with their idea and are of the recommendation that it is a great way of providing fast and smooth water distribution. As the plumbing fixtures will be easily receiving the water, you will also be getting the hot water without delay.
  5. It saves space: The attic usually stands out as the extra place at your home and therefore it can possibly make sense that it can be used for saving place. It can also aid you to gain extra storing space.

Is it possible to replace my existing tank water heater with a tankless option?

One obvious benefit to a tankless water heater is its smaller size. Instead of taking up a big chunk of floor space, tankless water heaters get mounted on a wall.

Another huge benefit is an unlimited supply of hot water. You can take a five-hour shower and you’ll never run out of hot water.

Arguably the biggest benefit offered by tankless water heaters is less energy consumption. Because there is no tank of heated water continually having to be kept hot, tankless water heaters don’t experience the same standby energy losses that traditional tank water heaters do. How much less? It depends upon the location to location.

Tankless water heaters also last longer, with warranties on heat exchangers typically in the 12-15 year range.

I would like to install a tankless water heater in my vacation cabin or home. Is it possible to drain all the water when I’m not using the system to prevent freeze damage?