10 Best Tankless Water Heaters 2021| Reviews and Buyer’s Guide

tankless water heaters reviews

“We all know that frustration when hot water runs out and you are still very soapy in the shower and have to now use cold water”.

Sucks big time!

That is, in a nutshell, challenges of having a traditional water heater.

Now, the majority of people are making the switch to tankless water heaters.

Tankless water heaters provide an endless supply of hot water, are energy efficient and save greatly on water bills and the best part is that they are eco-friendly. Unlike the traditional water heaters that are bulky, waste space and electricity.

In this review, you will get a comprehensive list of the top 10 tankless water heaters on the market. We have done the research and narrowed down to the best tankless water heaters so that you can find the perfect one for your home.

If you are in a rush, here is a comparison table for an overview.

NameFlow Rate Power Type Price  
Rinnai RUC99iN
9.8 GPMNatural Gas
Stiebel Eltro Tampra Plus
4.0 GPM Electric
ECO smart Eco27
3.0 GPMElectric
4.8 GPMNatural Gas
Rheem RTGH-95XLN Prestige
9.5 GPMNatural Gas
Rheem RTG-84XLP
8.4 GPMNatural Gas
Takagi T-Kjr2
6.6 GPMNatural Gas
Marey Power Gas 10L
3.1 GPMNatural Gas
Noritz NRC661-DV-NG
6.6 GPMNatural Gas
SioGreen IR260 Infrared
2.0 GPmElectric


1.RINNAI RUC98IN – Energy Efficient

When most people opt to have a tankless water heater, mostly it is because they want something that is efficient and cuts down on energy consumption especially in a commercial setup.

Who Is This Product Designed For?

This is tankless water heater is suitable for you if you have a large family that consumes a large amount of hot water during showers and you want to cut down on your energy bills. Then Rinnai RUC98iN that is what you want to consider as your tankless water heater.


This indoor tankless unit is a bit on the larger size and will require room to install.

Now you and your family can enjoy hot showers with this tankless water heater that has a hot water flow rate of 9.8 gallons per minute and can cater to several faucets and even 4 bathrooms simultaneously.

Energy saving

With an energy efficiency of 98%, you will be saving greatly on energy costs and this also contributes greatly to its versatility as a tankless water heater that is suitable for both large domestic households and commercial purposes where a large amount of hot water is required.

It comes with a remote control so you can adjust to your desired temperature comfortably without necessary going to the unit itself.

2 Venting Options

When it comes to gas tankless water heater the hustle for most people comes because most require venting. With this unit, you are provided with 2 venting options (concentric-PVC, Twin-pipe) which will save you greatly when it comes to the venting problem.

Built-In Scale Protection

If you have a problem with hard water, then you can relax because this tankless water heater comes with a built-in Scale protection to prevent any clogging.


The installation of this unit is made simple providing you with free special isolator, it is advisable to ask a professional to install for you for safety reasons.

Also make sure to check if you have compatible ground lines, circuit breakers, exhaust pipes and weatherproofing equipment to ensure that the installation process runs smoothly.

You don’t have to worry about emission of dangerous gases if this unit is installed indoors because it comes with NOx condensing systems.


  • Weighs; 1 lbs
  • Water flow rate;9.8 gallons in Mild weather and 5.6 gallons in cold weather
  • Energy; 199,000 BTUs
  • Temperature range of (98F-140F) degrees
  • Larger hot water flow rates
  • Safe from emissions because of the NOx system
  • Suitable for both domestic and commercial
  • Expensive
  • Bulky


Overall, the Rinnai RUC98iN is a powerful tankless water heater that saves greatly on energy costs while providing you with a large hot water flow rate and at the same time it is environmentally friendly.


This is a review from a company that prides itself with up to 90 years experience in manufacturing water heaters. This is a German manufactured product so you can be assured of quality and durability.

Who Is This Product Designed For?

Are you looking for a tankless water heater that can provide you and your family the satisfaction of enjoying hot water that is constant, cater for up to 2 bathrooms at the same time helping you save on energy bills then try the  STIEBEL ELTRON TEMPRA



The Stiebel Eltron Tempra is clearly built to last because it comes in a seismic construction that can withstand earthquakes with a compact design that saves up on space as it can be mounted on the wall or under the sink.

You get a sturdy sleek design that is steel coated, offering protection of its inner components from adverse weather conditions. This is a great advantage because it can be installed anywhere.

Self-Modulating Temperature Control

The self-modulating temperature control allows for the heater to regulate the amount of energy required to heat a certain amount of water, this saves greatly on energy bills of up to 30 %.

The other great thing that you can look forward to when you buy the Stiebel Eltron Tempra is the precise desired water temperature control with true thermostatic temperature control. This will ensure that you and your family enjoy reliable and constant water temperature control.

You can regulate the temperature thermostat on the simple and well to understand digital display area between the temperatures (86 F to 140 F).

Silent operation

This comes with a built-in electric switch that allows for the silent operation of this tankless water heater. You also get a high-temperature limit with a manual reset

A point to note is that this is purely electric tankless water heater, so no natural gas or venting needed.

Flow Control Technology

The Stiebel Eltron Tempra Advanced flow control technology ensures that the water is always at a consistent temperature by controlling the water flow rate.

This feature is very important because it can sense when the water flow rate is more than the heater can handle and regulates it. This is especially important for cold seasons and also for heavy duty cleaning when more water is required.

With a high water flow rate of up to 5 gallons, it is suitable for those who desire to fill up Roman style or Jacuzzi tabs with hot water.


The installation process for this unit is also easy and you can always as the assistance of a professional if required.


  • Weighs 15.4 pounds
  • 5 x19.5 X8.8 inches
  • Requires 200 amps service
  • Quality built and durable
  • Self- modulating
  • Compact design
  • No venting required
  • 7-year warranty for the leakage and 3-year warranty for the parts
  • Can require a professional to install


With the Stiebel Eltron Tempra, you can enjoy precise water temperature controls, savings on your energy bills, a sleek compact design that can be mounted on the wall saving on space and a Tankless water heater that is fit for hot and cold climate conditions according to your needs. This is a definite return on your investment!

Do You Have Hard Water?

Then you should consider hard water treatment for your tankless water heater, this will help you avoid clogging issues. It will ensure that your tankless water heater performs at its most optimal level. Check out for more info.


This is a great tankless water heater and has been rated highly by many users when it comes to tankless water heaters.

Who Is This Product Designed For?

If you are on the hunt for a tankless water heater that has a large water flow rate and can accommodate your family as well as save greatly on energy bills, then the EcoSmart Eco 27    in the tankless water heater for you.



The EcoSmart Eco 27 has a sleek design to it within a copper construction material and a stainless steel finish for added durability and easy maintenance.

This is generally a small compact unit that is stylish and can fit in most small spaces whether it is behind the sink area.

Point to Note is that this is a fully an electric tankless water heater so you don’t require natural gas or any venting.

Self-regulating technology

The other thing to look forward with this Tankless water heater is that it comes with a self-regulating technology that is able to regulate how much energy is required to heat a certain amount of water which is a great feature for energy saving.

Plus the fact that there is a minimum flow rate required (0.25 GPM)  for it to heat the water so you can rest assured that it will not waste energy on those sink drips.

With this unit, you get to enjoy a water flow rate of 6 GPM in hot temperatures and 2.7 GPM in cold temperatures which can accommodate 4 showers and 1 sink simultaneously.

Digital water temperature adjustment

With the EcoSmart Eco 27, you get a digital water temperature adjustment that allows you to set temperature increments of up to 1 degree from (80 degrees F to 140 degrees F).

You can also operate freely in the comfort of your shower with the waterproof remote control thermostat provided.


  • 75 pounds
  • 17 x 17x 625 inches
  • Requires 200 Amps electrical outlet (240 V,27kw)
  • 3x 40 required breakers
  • Good water flow rate
  • Durable built material
  • Saves 50 % energy bills
  • No Natural gas or venting needed
  • Saves on storage area due to a compact size
  • Easy to maintain
  • Limited lifetime warranty
  • Requires professional installation for the warranty to be effective


All in all, with the EcoSmart Eco 27 u get a unit that gives you and your family a large water flow rate with the adjustment of the temperatures to a degree and energy savings and a durable compact tankless water heater. This by far is the best on the market right now.


This is a relatively affordable tankless water heater that is best suited for smaller houses, cabins or cottages.

Who Is This Product Designed For?

Are you currently on a budget and are looking for a tankless water heater but you don’t have a gas line, plus you don’t want to use electrical energy as fuel?  Then the Eccotemp FVI- R –LP propane gas tankless water heater is for you.



This is a super modern sleek design of indoor propane tankless water heater with a stainless steel vent for safety and proper electrical ventilation.

Precise Temperature Adjustment

With this unit, you get an easy to understand digital display where you can manually adjust precisely the water flow rate and your desired water temperature.

This has a hot water flow rate of 4.8 gallons that can cater 2 bathrooms simultaneously because generally, most showers require a water flow rate of 2 gallons. (Note that the minimum flow rate for this unit is 0.68 gallons).


The unit is also easy to install but it is recommended for a professional to do the proper installation for the warranty to be effective.

The Eccotemp FVI- R –LP includes an Eccotemp EZ flushing kit to ensure easy maintenance and durability of the heater.


  • Weighs 20 pounds
  • 74, 500 BTU  to offer 100volts
  • 8 gallons of water
  • Compact size
  • Perfect for a small house in remote areas
  • Easy to install and maintain
  • Safety features
  • No natural gas line required
  • Venting for exhaust fumes
  • Requires a while to heat water up


The Eccotemp FVI- R –LP is a compact propane powered tankless water heater that is affordable, Eco- friendly, easy to install and maintain perfect for small houses with less hot water needs and for cottages and houses in remote areas where it is not easy to access to electricity or a natural gas line.


This is a durable and quality natural gas tankless water heater from the Rheem Company which is known for its quality products.

Who Is This Product Designed For?

If you are looking for an efficient outdoor tankless water heater that can assure you of constant hot water at large flow rates of up to 9.5 gallons and you don’t want to spend money on the high-end tankless water heaters, then the Rheem RTGH-95XLN is what you have been searching for.



It comes in a sleek and elegant compact size that saves on space during installation.

Water Saving Activation Technology

You get the water saving activation technology, this works by regulating the water flow until the heater set temperature is reached.

(The minimum flow rate for this particular natural gas tankless water heater is 0.25 GPM and the minimum activation flow rate is 0.40 GPM)

Stainless Steel Heat Exchanger

The Rheem RTGH-95XLN heater uses the stainless steel heat exchanger that is known in higher performance of recycling heat exhaust. This is a good feature for saving on water and energy.

Recirculation Process

This unit also ensures that you save gallons of water per year due to its recirculation process that also guarantees hot water for a constant period of time. So now you can have hot water right when you open the tap, no more waiting.

You can be assured of instant and continuous hot water flow with the Rheem RTGH-95XLN which has a hot water flow rate of 9.5 GMP. This can cater for 3 bathrooms simultaneously

Over- Heating and Anti- Freezing Protection

The other advantage that comes with this Rheem RTGH-95XLN Prestige water heater is that there is an overheating and an anti-freezing protection to the hot water piping system.

The antifreeze is especially important when it comes to very cold temperature seasons when water can freeze in the piping system and affect the flow of water, this prevents that.

Then the Over-heating protection prevents the water from reaching high temperatures where it shuts the system down.

WIFI connectivity

This tankless water heater has added WIFI connectivity to help in the easy usage of the unit. It can be controlled by the ECONET smartphone app that you can easily download and you will need to attach the ECONET accessory kit to the heater to be able to enjoy the benefits.

Environmentally Friendly

This natural gas tankless heater is environmentally friendly and meets the SCAQMD rule 1146.2 requirement due to its water conservation capabilities and low emissions of NOx.


This tankless water heater comes with a self-diagnostic system that makes it easy to install and maintain. Point to note here is that it is a natural gas heater and you will require venting.


  • Weighs 80 pounds
  • 75 x 27.5 x 18.5 inches
  • Energy factor of 0.94
  • 2- inch venting
  • Water flow rate of 9.5 gallons
  • Affordable
  • Intelligent technology
  • Compact design
  • High water flow rate
  • Energy and water saving
  • Easy installation
  • Environmental friendly
  • 12-year warranty
  • Venting is required


All in all the Rheem RTGH-95XLN  is a great outdoor natural tankless heater to consider, apart from its affordability and quality you get to enjoy large constant flow rates of hot water, a unit that is environmentally friendly with added ECONET app to enhance usability.

6.RHEEM RTG 84 XLP- Budget Friendly

Let us look at another powerful outdoor Natural gas Tankless water heater from the Rheem Company.

Who Is This Product Designed For?

If you have been on the hunt for a tankless water heater that will provide you with large hot water flow rates but you don’t want to spend on those high-end models, then Rheem RTG 84 L is for you.


This is a compact outdoor tankless water heater and is suitable mostly for large to medium households.

With this tankless water heater, you get a hot water flow rate of 8.6 gallons that is able to cater for 3 bathrooms simultaneously.

Point to note here is that thou this unit is able to save up on your energy costs, this flow rate will eventually increase your water bills. The minimum flow rate is 0.40GPM for activation is 0.26 GPM.

Re-Circulation Pump

The beauty of this tankless water heater is that it comes with a re-circulation pump that ensures that you get hot water immediately when you open your faucet without waiting. Now you and your family can enjoy hot water constantly throughout the year.

Energy saving

To provide you with energy saving capabilities the Rheem RTG 84 XLP uses an all-copper heat exchanger to have greater heat exchange and transfer.

Simple digital display

You get a digital display meter to set your desired temperature and for comfort and convenience, it comes with a remote control so you don’t have to go to the unit itself to change the water flow rate or the temperatures.

Freeze Protection

It comes with Freeze protection that is that is only applicable to mild weather but if you are living in very harsh climates then this is not the best outdoor tankless water heater for you because it was not built to withstand harsh cold weather.


The other great thing about this water heater is the fact that it is eco-friendly with low emissions due to the Ultra low NOx burner.


If you are one who enjoys DIYs then you will love this unit because it comes with easy to read manual instructions that you can read and install the unit in no time.

Check to see if you have compatible ground lines and circuit breakers, electrical boxes, weatherproofing equipment available to ensure that the installation process is a breeze. You can always ask the assistant of a professional.

This is also a self-diagnostic system which makes installation and maintenance a lot easier.


  • Weighs 54 pounds
  • Hot water flow rate of 8.6 GPM
  • 84 energy factor
  • 180,000 BTU
  • Dimensions (114 x 10 x 26 inches)
  • Less expensive compare the other Rheem products
  • Large hot water flow rate
  • Compact size
  • No venting required
  • 10-year warranty
  • Cannot withstand harsh cold conditions


Overall, the Rheem RTG 84 XLP is a great tankless water heater that will assure you and your family hot water throughout the year. You are getting an outdoor tankless water heater that gives you high hot water flow rates, saves on energy and is easy to install.


This is one of the smaller units yet powerful indoor tankless water heater from the Takagi Company that is one of the pioneers to introduce tankless water heaters to the US market

Who Is This Product Designed For?

This unit is perfect for a small to medium household that requires a tankless water heater that uses gas.



The Takagi T KJr2 IN NG comes in a beautifully compact design that can fit indoors and also saves on space.

Simple Display Control

You get a simple display control to adjust the water flow rate and water temperature but it also comes with a power cord and a remote control so that you don’t always have to go to the unit itself to change the settings.


Another good thing about this tankless water heater is that it is self-modulating, meaning there are thermistors that are connected to the inlet and the water outlet to monitor the water temperature. This ensures that throughout your household enjoys consistent water temperatures.

You and your family can rest assured of constant hot water with a flow rate of up to 6.6 gallons which is able to serve 2 bathrooms simultaneously.

Anti- Freeze Protection

With the Takagi T KJr2 IN NG, you get a built-in the antifreeze protection, an automatic cut off fuse for when the system overheats plus high temperature reset and flame sensor for safety reasons.


A point to note is that since this unit uses natural gas make sure to check if it is compatible with your normal gas lines and ventilation systems.

If you decided to install this unit outside you will require venting horizontally and vertically.

It is advisable to ask a professional to install this unit for safety concerns and for you to be able to have the benefits of the 15-year warranty.


  • Dimensions;13.8 X6.7 X 20.3 inches
  • Weighs;38 pounds
  • Water flow rate;6.6 gallons per minute
  • Energy; 140,000 BTU
  • Compact design
  • Self-regulating
  • Energy saving
  • 15-year warranty
  • Professional installation for the warranty to be effective
  • Requires venting


With the Takagi T KJr2 IN NG tankless water heater, you get a long-lasting heater so you and your family can enjoy hot showers for a long period of time. This unit is compact and fits in small areas plus it is eco- friendly because it uses natural gas.


This is one of the most affordable battery-powered gas tankless water heaters.

Who Is This Product Designed For?

This is propane gas tankless water heater that is suitable for you if you have one bathroom and you require hot water just for showering and washing dishes.

It can also be suitable for persons with a vacation home in remote areas that experience electrical blackouts since it uses Batteries as fuel.



It comes in a lightweight compact design and uses a copper heat exchanger that is able to last a long time due to its capability to resist corrosion.

Powered by 2D batteries

This tankless water heater use that power of 2D batteries to heat up water and so no electricity is required which makes it eco- friendly since it gives you the option of also using natural propane gas to power its system.

This becomes very convenient, especially If you find that you are in a  vacation home or cottage with your family and you require hot water for showering and there is no electricity available.

Water saving

It also saves on the energy by 60 % since it only uses gas when there is water flow.

With a hot water flow rate of 3.1 gallons, it can serve one bathroom and a sink or can be used as a dedicated heater for your kitchen faucet.

You are provided with a digital display and knobs to adjust the water flow rate and to set your desired temperature.

Anti-Freeze Feature

There is an Anti-freeze feature that comes with the Marey power gas that ensures that during the cold month’s water doesn’t freeze in the pipe system.

This is achieved through the closing of the discharge valve and to accumulate standing water in the pipes and thus preventing it from freezing.


It requires less space and is easy to install plus it contains an auto-ignition system.


  • Dimensions ;24 x 14 x 7 inches
  • Weighs 21lbs
  • Water flow rate;3.1 GPM
  • It is eco- friendly
  • Compact design
  • Clean and safe
  • Easy to install
  • No electricity needed
  • 5-year warranty
  • Less power


Overall, the Marey Power Gas 10L this is a great compact size tankless water heater that saves on energy consumption and is suitable for small households and vacation homes. It offers you the convenience of enjoying hot water showers when there is no electricity and it comes in a compact size that is easy to install and saves up on space.


This is a review from a company that is one of the pioneers in tankless water heaters. The Noritz Company has been producing electric heaters since 1981 so you know that they know what they are doing.

Who Is This Product Designed For?

If you are currently looking for a natural gas water heater that is budget friendly, saves on electrical bills and will provide you with a large amount of hot water flow rate,  the Noritz NRC661 DV NG  maybe what you have been looking for.



This is a compact, lightweight natural gas tankless water heater that is condensing and requires electricity for ignition.

It is built of sturdy steel coated with polyester and has 2-heat exchangers that are made of commercial grade copper that is thicker than what other tankless water heaters use.


With this unit, you get a built-in computer system that ignites the burner and only runs when the water valve is one and shuts off when the water valve is off saving you on energy.

(Remember with this unit you will require electricity for ignition purposes.)

Energy Efficient

The efficiency factor of 0.95 you get to save greatly on your energy bills. (The higher the efficiency the more money you save)

You get to adjust the water flow rate and the temperature with the option of a digital display and a remote control with a temperature range of between (100F-140F).

Then for those who live in higher altitudes, this tankless water heater comes with an elevation adjustment.

With a hot water flow rate of 6.6 gallons per minute if can supply to 2 bathrooms and a faucet simultaneously.

Safety Features

The other great thing with this water heater is that it provides you with impressive safety features like the flame sensor, freeze protection, overheating protection, lightning protection devices, condenser over-fill, fan rotation detector and a temperature lock control.


This best part about this Natural gas tankless water heater is that it is eco-friendly by reducing the energy consumption and carbon emissions.

The built-in quality is made to last for a long time and yet it made of recyclable materials thus preserving the environment.


This heater can be installed indoors or outdoors because doesn’t require a lot of space for installation due to its small size.

The instructions for installation are easy to understand and it can be installed with 40 PVC pipes and fitting in no time.


  • 58 pounds weight
  • 6 GPM
  • Efficiency factor of 0.95
  • 120,000 BTU
  • Dimensions of 17 x 13 x 29 inches
  • Quality and durable
  • Compact size
  • Can be installed indoors and Outdoors
  • High hot water flow rates
  • 95 energy efficiency
  • Advanced technology
  • PVC vented installation.
  • 12-year warranty
  • Venting required


 With the Noritz NRC661 –DV-NG you get an energy efficient Natural gas tankless water heater that is reliable and with a built quality with amazing safety features and overall it is affordable.


This is a popular quality product from a popular Bosch company.

Who Is This Product Designed For?

This is the perfect tankless water heater for someone who lives in a place that has hard water problems since it can resist lime scaling and calcium build-up eliminating the need for water purification.



The SioGreen IR260 Infrared comes in a small sleek design that can be easily attached to the side if an RV.

This provides you with a hot water flow rate of 1.5 gallons per minute which can provide water for 1 bathroom and a sink.

Infrared Energy

This tankless water heater uses a coil-less technology (no direct contact with metal) to heat water which utilizes a quartz tube to generate infrared energy to warm the water.

This will greatly eliminate scaling or build-up and corrosion of any sort.

Zero maintenance

Thus, it saves you on the costs of maintenance even leading to zero maintenance and adds to the durability of this tankless water heater.

This infrared tankless water heater heats water only on demand when the water valve is put on, this a good thing because it does not let water stand still. This reduces that accumulation of bacteria or algae in the water.

LED display

You get to view temperature through the LED display and it has an in-built thermocouple temperature monitor which ensures that the water temperature remains constant.


The installation process is also made easy by the use of the manual instructions and also a video tutorial. You also have the option of utilizing a professional to install for you.

Due to its small size, it will not require a large space for installation.


  • 75 pounds in weight
  • Water flow rate of5 GPM
  • Dimensions 14.3X 12.8 X 4.8 inches
  • Energy efficient
  • Quartz infrared energy powered
  • Zero maintenance costs
  • No build-up or scaling
  • No bacteria or algae
  • Quite unit
  • 10 years warranty
  • Low water flow rate
  • Larger than expected


The SioGreen IR260 is a practical tankless water heater for a small household. You get an efficient unit that saves you on maintenance costs, durable and you can say goodbye to the accumulation of bacteria and algae.

Buying  Guide For  The  Best  Tankless Water Heater

tankless water heatersThe main reason that people opt to have a tankless water heater is that they want to save on the energy required to provide their households with hot water demands.

 How Does A Tankless Water Heater Work?

Incoming water enters the heating chamber, then the heat is transferred from the heat exchanger, mostly copper to the water and then the hot water goes out depending on the demand of the faucet opened.

 What Are The Advantages Of Having A Tankless Water Heater?

  1. Energy efficient
  2. Eco-friendly because of the reduce energy costs
  3. convenient –can supply hot water on demand and offers you the flexibility  to not wait for water only at a certain time of the day like the  traditional heaters
  4. cheaper to run-require less energy consumption to operate
  5. Durable – with a lifespan of more than 20 years you can be assured of hot water for a long period of time.
  6. don’t need a water tank to store water so you will not have to
  7. Minimal bacteria and algae accumulation in your water since the water does not stand still.


1.Type of Tankless Water Heaters

There are different types of tankless water heaters but the main types are those that require Natural gas, propane and electricity.

Here you need to decide on the type of energy source that is more suitable for you and they all have their advantages and disadvantages.

The electrical tankless water heaters are powerful and efficient but consume more energy in comparison to the natural gas and propane tankless water heaters.

On the other hand, the natural gas tankless heaters consume less energy but require venting and compatible ground lines and even proper ventilation because of the emission of fumes.

2.How Much Water Does Your Household Need?

This is generally the hot water flow rates, the minimum flow rate and the maximum flow rates.

Flow rate-this is the measure in gallons per minute (GPM).

Minimum flow rate– this is also known as activation, it is the water flow rate required to activate the heating components and usually ranges between (0.1 GPM to 0.9 GPM)

Maximum flow rate– is the maximum amount of water that can flow through the unit while being heated. This is greatly affected by the climate condition and outside temperature rise which affects the incoming water.

The point to note here is that cold water comes out of your shower or the faucet when the tankless water heater cannot cater to your household water demands.

Measure your household water demands especially on a time when there is a lot of water usage, like for example in the mornings when everyone is getting ready this will ensure that you purchase a Tankless water heater that caters a hot water flow rate for you and your family.

3.Energy Efficiency

This is to calculate how much a unit converts energy into heat and how much a unit converts energy into heat and how much energy is lost. The rule of the thumb is the higher the EF the more efficient that unit is.

4.Safety Features

There are various safety features that come with the different brands of tankless water heaters. They include things like the flame sensor, Freeze protection, temperature lock, and over-heating.

They are essential since they prolong the life of your tankless water heater and also for safety.


For most of the tankless water heater, it is advisable for you to ask the assistant of a professional plumber to install for you. This is more so because some brands count the warranty void if not installed by a professional.

The benefits of asking a professional to install for you are;

  1. The warranty is valid
  2. To avoid future flooding if not properly installed
  3. For easy maintenance of the unit in future
  4. For advice and consultancy for things you require and don’t understand
  5. Peace of mind
  6. Safety reasons