Best Tankless Water Heater 2020 : Reviews and Buying Guide

Best Tankless Water Heater 2020 : Hot water is needed for a lot of purposes, it can be for doing laundry, washing dishes, taking a bath and more. It’s not possible to boil huge quantities of water for every purpose. Otherwise, your gas bills will be out of the roof. That’s why you need tankless water heaters.

These heaters occupy less space and can fit anywhere. Moreover, they are also powerful enough to power multiple fixtures easily. Of course, these machines come with a lot more features. If you want to buy a tankless water heater then you will want the very best for you and your family’s needs. To help you out, we have compiled a list of the very best tankless water heaters available in the market.

Best tankless water heater Reviews 2020

Below given is the list of the very best water heater which comes with a variety of useful and appealing features:

#1. Chronomite SR-20L/120 HTR SR Series Instant Low Flow Tankless Water Heater, small

Going to take a bath during winters? Or do your legs need some R&R in the form of a hot water bath? In both cases and more you will need hot water. It can be for bathing or for submerging your aching legs. This little water heater delivers to you hot water when you want it. It has been designed for either horizontal installation of hardwiring. You should install it at the point of use. This will be a more efficient use of the machine and its technology.

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The machine makes use of a microprocessor technology which allows you to pre-set or control the output temperature. This delivers unlimited hot water to you. But you can rest assured that there’s no rush of scalding. The temperature here rises at 0.40 GPM: 41 Degrees F. The water temperature you will get is from 90 degrees to 120 degrees F. This broad range ensures that you can get steaming hot water or lukewarm water according to your needs. Such a range also means that it can cater to the different water temperature needs of different family members. It is easy to use and you will be able to control the water temperature you want by using a knob that is attached to the front of the heater. There is an LCD screen where the water temperature will be displayed. Just turn the knob one way or the other to increase or decrease it.

You will find that this machine comes with a 3/8 inch cold water inlet and outlet connections. The machine has a clean and box design which ensures that it can fit under small spaces easily. It comes with two mounted chrome compression fittings. This allows for easy installation. The chrome compression fittings are durable and strong. So you don’t have to worry about the heater falling off and hurting someone. Chronomite only works when hot water is requested. This saves water as well as your electricity bill. As such it is a great economical solution.

What we like

  • Microprocessor technology for presetting the temperature
  • Easy to install
  • Efficient use of water and electricity
  • Easy to use
  • Clean design

#2. VentFree Tankless Gas Water Heater PROPANE GAS – Exclusive Low Water Pressure Startup technology 1.6 GPM PURE COPPER HEAT EXCHANGER

Everyone wants hot water whether it is for bathing or any other purpose. But using ordinary water heaters is like spending tonnes of money the moment you switch it on. These heaters are highly inefficient when it comes to saving water for electricity. That’s where Excel’s tankless water heater comes in. This heater will save you energy and water by instantly delivering hot water to you whenever you need it. For this, you will just have to open the hot water tap. It has a built-in pure oxygen copper heat exchanger which is thermally efficient.

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This machine comes with a beautiful and unique design which makes it very attractive to look at. It can easily be a part of your kitchen and laundry room without seeming garishly out of place. This heater can be easily installed inside the house. You don’t have to incur any kind of expensive installation charges as well. The ductwork of this machine is outfitted using state of the art ODS (Oxygen Depletion Safety shutoff device). This is a safety feature that will keep you safe while using this heater.

This entire unit can be used for a 2 1/2 bath. Moreover, you will be able to use this from multiple points and connect it to an existing hot water piping. This ensures ease of use as well as accessibility. Now you don’t have to worry about where to put this unit or which bathroom should you prefer. Yet, it is recommended that there’s only one point of use at a time. Not just in apartments, you will be able to use this compact unit in sailboats, mobile homes, campers and such.

What we like

  • Built-in pure oxygen copper heat exchanger
  • Oxygen Depletion Safety shutoff device
  • Visually appealing design
  • Compact unit for versatile use

#3. Ecosmart POU 3.5 Point of Use Electric Tankless Water Heater, 3.5KW@120-Volt

Make use of this machine to get the hot water you deserve, whether it is for taking a quick bath or for washing your clothes and dishes. This unit will be able to give you hot water for one sink or one point at 0.5 GPM in warmer climates. It’s easy to install this machine and you won’t have to pay an expensive bill for it. But do keep in mind that you need a minimum of 100 amp electrical panel for installation with (1) 30 amp single pole breaker. This should be connected to the #10 AWG wire. Plumbing connections needed for this machine are 1/2″ NPT.

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To get the hot water you will have to just press the button. Then you will be able to get consistent hot water on demand. This product is compact and as such it’s recommended that you use this with just one singular sink. It’s so small that you can install it under the sink. But don’t use this with multiple fixtures or even with a shower. You will be able to see the temperature of the water through a digital display. This will allow you to better manage the hot water since the heater is flow controlled. This means that the temperature of the water will adjust according to the flow rate.

This unit is made up of stainless steel and copper components which give it durability and efficiency. These components are also easy to replace. So you don’t have to worry about finding parts when the machine ultimately breaks down. This model can be used in offices, boats, RVs, doctor’s office and more such small spaces. If used correctly then you will get an unlimited flow of water. Note that, if you are not getting the desired water temperature then just slow the water flow rate.

What we like

  • Hot water on demand
  • Useful for small spaces
  • Durable and efficient
  • Flow controlled heater

#4. Rheem 240V 3 Heating Chambers RTEX-24 Residential Tankless Water Heater

When you are with family then the need for hot water increases exponentially. Someone may need it for washing dishes and clothes while someone else may need it for soaking their legs. The needs are many but getting warm or hot water for so many people is difficult. But that will never be a problem with Rheem’s tankless water heater This unit is perfect for use if you want a continuous hot water supply. The best part is that you will be able to use it through a single point of access at a time as well as for multiple applications.

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The unit comes with an external digital thermostatic control of the LED display. This means that you will be able to set the water temperature according to your wishes by turning the knob one way of the other. The LED display on the front will allow you to see what you are setting the temperature as and make the work easier.

This machine contains durable and high-quality copper which is good at conducting heat and heating the water fast. The water flow rate is up to 5.9 GPM. This is an impressive flow rate which ensures that you don’t have to wait for a long time to see the warm water trickle out. This makes it less time consuming and more economical. You will be able to control the temperature in increments of 1°F ranging from 80°F to 140°F. This gives you more control over the temperature you select for getting your work done. It increases energy efficiency. You will find that the machine is 99.8% energy efficient which means that you don’t have to pay a tonne of electricity bills every time.

This small and stylish unit will fit into your modern kitchen or such with ease and won’t seem out of place at all. It’s very simple to install this unit and you don’t have to field costly installation expenses for this. This unit has a digital temperature display which will show you the current temperature of the water. Such a feature allows you to change the temperature one way or the other. This self-modulation makes it easy to control the water temperature by just changing the power. It can be used for many applications. For a standard hand sink, it will supply 0.5 GPM, for a Washing Machine that’s 1 to 1.5 GPM, for a kitchen sink and water saver shower head also its 1 to 2 GPM. A bathtub will take 4GPM and a whole home will need 6GPM.

What we like

  • External digital thermostatic control
  • Self temperature modulation
  • Durable heating copper
  • Easy to install

#5. Rheem 240V Heating Chamber RTEX-13 Residential Tankless Water Heater

An ideal water heater shouldn’t just churn out the hot water, it should be able to do so when commanded. If that’s what you are looking for then this machine is perfect for you. It comes with durable copper which helps in better heat conduction. This allows you to get warm water pretty fast whenever you need it for whatever purpose you might have. The design of the machine is also sleek and stylish. It will look great and not garish in whatever room you might put it.

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You will be able to self modulate the water temperature to get the temperature you want. For this, there’s an LED display that shows you the temperature on it. There is a knob which you can turn one way or the other to control the water temperature. You will be able to adjust the temperature with an increase of 1°f. The components used in this machine are all of the high quality but they are easy to replace if the machine fails to function.

It’s very simple to install this machine and its cost-efficient as you. You certainly won’t have to pay any big bills to get this machine installed. Such a compact machine won’t take up much space. So you can install it wherever you want. The unit comes with 1/2 NPT adapters and side 1/2 inch compression water connections which makes the job easier. Along with less installation cost, this machine ensures that there are no big electricity bills as well. This is because the unit is 99.8% energy efficient.

What we like

  • Self temperature modulating
  • External digital thermostatic control
  • 99.8% energy efficient
  • Easy to install

#6. StiebelEltron 224199 240V, 1 Phase, 50/60 Hz, 24 kW Tempra 24 Plus Whole House Tankless Electric Water Heater, Advanced Flow Control

While buying a water heater for their homes, everyone wants one which can deliver a consistent hot water supply. But that’s not the only primary criteria, the water needs of the same temperature all the time it is flowing. After all, you will not prefer boiling water one second and lukewarm in the next. If that’s the two criteria you are looking for then this unit will be perfect for you. This unit maintains a constant temperature output no matter how high the hot water demand is. It uses Advanced Flow Control technology which will let you control the flow of water by eliminating any kind of unpleasant temperature fluctuations. So you will get hot water anytime you want and for whatever purpose you want without any delay. This technology is certainly time-consuming and economical in the long run.

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When it comes to temperature control then that’s easily done in this unit. You will be able to see the temperature on an LED screen and then use the knob to control it whichever way you want. You can opt to increase or decrease the water temperate according to what you need the water for and what kind of temperature you prefer for it. With this unit, you will be able to save at least 15-20% on the hot water portion of your electric bill.

It is very easy to install and you won’t have to incur high installation charges for it. This machine is made up of high-quality components that are durable and reliable. They are also easily replaceable if it gets damaged. This ensures that you don’t have to spend time looking for the parts. The sleek and stylish design of this unit will look well anywhere you might decide to out it. Whether it is in your kitchen or laundry room, the machine will never look garish or out of place.

What we like

  • External digital thermostatic control
  • Advanced flow control technology
  • 15-20% hot water saving
  • Sleek and stylish
  • High-quality components

#7. EcoSmart ECO 11 Electric Tankless Water Heater, 13KW at 240 Volts with Patented Self Modulating Technology

When anyone thinks of buying a water heater then the first and foremost thought which comes to mind is energy saving. This is because energy-saving means that the electricity bill which you will have to pay at the end of the month will be less. While many water heaters promise such energy efficiency but very few can get it done. That’s not that problem with Ecosmart’s electric tankless water heater. With this, you will be able to save for up to 60 percent on your water heating costs. The water heater is 99.8% energy efficient.

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It is certainly a bad experience if you are stuck in the shower with no hot water. But using this unit ensures that you won’t have to combat with hot water shortage anytime. You will get a good flow of hot water whenever you want. It has a patented self-modulating technology and design. This helps regulate just how much energy is required to heat the amount of hot water needed. Such a unit is also wall-mounted and compact, which means that you save a lot of space while installing it.

Make sure you determine the specs as well as the electrical infrastructure because without that your unit might not fit into the breaker panel. You will need a minimum 125 amp electrical panel for installation with (1) 60 amp double pole breaker connected to (1) set of #6 AWG wire. This unit is ideal for small apartments and a small point of use application. It can heat about 2 gallons per minute and is optimal for the weather of 68°F and above. You will be able to use it for single or multiple applications, all depending on your climate. In warmer climates, this machine can run two sinks at the same time as well as one shower. But in colder climates, it can run just two sinks simultaneously.

What we like

  • Unlimited hot water
  • 50% energy efficiency
  • Compact design
  • Digital temperature control

#8. Rinnai V Series HE Tankless Hot Water Heater: Outdoor Installation

When anyone buys a water heater then it’s with the expectation that there will be endless hot water for the whole house. If that’s the expectation you are bringing you are bringing whole buying this unit then your choice will be right. With this machine, you won’t have to schedule your hot water needs or choose whether you will have to do the laundry first or fire up the dishwasher first. You will never run out of hot water with this and find yourself in the cold. This unit comes with ThermaCirc360 technology which recirculates the hot water through your pipes so that you can get hot water fast. This will save you time and water too because ordinary heated waste a lot of water while the hot water travels from the old tank to the shower.

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With this water heater, you will be able to get up to 6.5 GPM hot water flow rate. But keep in mind that it does vary by the groundwater temperature. A major benefit of this unit is that you will be able to schedule hot water using its mobile app. This app is called Control-R 2.0 and it comes with timers which will let you schedule your hot water usage throughout the day. It will also let you remotely put the system into vacation mode. The machine is very strong and durable, you can rely on for two decades at the least.

Installing this unit is easy and you won’t have to incur extra costs for an expensive installation. This model has a compact design that ensures that it’s easy to install this even in non-traditional moves like a closet and an attic. It’s so efficiently packaged in a compact shape that you will be cutting off on CO2 emissions and make use of less water and energy. It saves 40% more energy than the traditional tanks since you will get hot water only when you need it. This will certainly reduce your electricity and water bills.

What we like

  • ThermaCirc360 technology
  • Endless hot water
  • 40% energy saving
  • Compact design
  • Mobile app for remote control

#9. Rheem 240V 2 Heating Chambers RTEX-18 Residential Tankless Water Heater, small, GREY

While buying a water heater for yourself there are a lot of features which you have to consider. Getting an ideal heater that comes with endless hot water, easy to control temperatures and more is difficult. But Rheem’s water heater is a full package that doesn’t disappoint. It has durable copper components and heats water fast. This saves energy as well as water. This unit allows for a flow rate of 4.4 GPM which means that it can be used for a small apartment and from various fixtures. You will get hot water whenever you want it and don’t have to schedule your tasks in any way.

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It is very easy to control the temperature of the water in this model. There’s an LED display that depicts the water temperature here and it comes with a knob or handles which you can use to either increase or decrease the water temperature. This allows for greater self-modulation as you will be able to adjust the power to get the temperature you need according to the task at hand. After all, the temperature washing dishes and doing laundry is different.

The model is made up of high-quality components that are easy to replace if the machine shows problems while functioning. So you don’t have to run hither and thither to get parts for it. The machine has a compact design that fits anywhere you want. Using this model will save you money, water, and energy, all the while ensuring that you get as much jit water you need.

What we like

  • LED temperature display
  • Self temperature modulation
  • Compact size
  • Energy efficient

#10. Rinnai V65IN Tankless Water Heater, Large, V65iN-Natural Gas/6.5 GPM

When the time comes to buy a water heater there are a lot of features to consider but one of the most important points is regarding the supply of hot water. Everyone wants an endless supply of hot water so that there is no need to schedule their daily household tasks. No one likes to choose between turning on their dishwasher and choosing to get their laundry done. With this water heater, you don’t have to choose. You will get endless hot water for your entire home whenever you want. This highly efficient unit allows for a 6.5 GPM hot water flow rate. But know that this varies by groundwater temperature.

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A major benefit of this unit is that you will be able to schedule hot water using its mobile app. This app is called Control-R 2.0 and it comes with timers which will let you schedule your hot water usage throughout the day. It will also let you remotely put the system into vacation mode. The model makes use of ThermaCirc360 technology to circulate hot water through your pipes so that you get hot water fast. This will save you both time and energy. After all, ordinary water heaters waste a lot of energy and water in the time it takes for the hot water to travel from the old tank right to your shower or another point of access.

It has a leak detection feature that shuts off water to limit the property damage. There is a temperature lock as well which prevents any unauthorized or accidental changes to the water temperature. The compact design of this model ensures easy installation. You will be able to install this even in compact spaces like the closet, attic or such. The model also cuts CO2 emissions. Overall, it uses 40% less energy than traditional tanks. This is because you get hot water only when you press the button.

What we like

  • 6.5 GPM hot water flow rate
  • ThermaCirc360 technology
  • Temperature lock
  • Leak detection
  • Endless hot water

Best Tankless Water Heaters 2020 : Buying Guide

The above list features some of the very best tankless water heaters in the market. But if you go into the market then you will surely find any other model which will appeal to you. Before you buy any model make sure you know about the most necessary features which should be there in an ideal tankless water heater. These are:

  • Material

The components within decide what kind of water heater you get. High-quality components ensure that you get a durable and reliable water heater which will last for a long time. Copper components work well and last for a long time so it’s ideal to get those if possible.

  • Water flow

Tankless water heaters don’t come cheap. You will be investing your money in the machine to get some good service out of it. As such make sure you buy those heaters which give you an endless supply of hot water. You will hate it if you have to wait to get hot water and on top of that wait to get a continuous flow.

  • Temperature control

Any water heater whose temperature you can’t control will trouble you later on. You will need water for various purposes and different tasks need a different range of hot water temperatures to get it done. So get a tankless water heater which has a knob that will let you control the water temperature to what you need then.

  • Energy efficient

If you don’t want to pay huge electricity and water bills periodically then you should get a water heater which doesn’t consume too much water and energy. Energy and water-efficient heater will be very economical in the long run.

Overall, now you have a list of the very best tankless water heaters on the market as well as a list of the features which you should keep in mind while buying one. Now you will have to decide which one is best for your needs and wants. Make sure you take into consideration the pros and cons of every model as well as your own needs. This means that you should consider whether you need a water heater for family needs or personal needs, how much you have to save on electricity bills, how many tasks you will use it for and more such. Make an informed decision so that you can use it for a long time.