Conventional tank-style water heaters are part of history, and now people prefer tankless water heaters because of better efficiency. But do you think that a tankless water heater is capable of increasing efficiency?
The stats show that energy efficiency is increased by up to 24 to 34% because of the use of tankless water heaters. However, to find out the best tankless water heater, you must do a little research before making the final decision to invest in a tankless water heater.
Switching from a conventional water heater to a tankless one can be a little heavy on your budget but guess what? Getting a tankless water heater is a perfect choice for long-lasting use. These tankless water heaters provide you the excellent value for money. Moreover, the top-rated tankless water heaters are capable of running for up to 20 years.
And to find out the perfect tankless water heater; you must consider reading the tankless water heater reviews below to get your hands on the ideal option. Some of the best tankless water heaters brands in the list below will help you find a great water heater to serve you in the long run.
List of 15 Best Tankless Water Heaters
| Image | Name | Rating | Price |
|---|---|---|---|
 | Ecosmart Eco 27 (Electric) Best Overall) | ⭐⭐⭐⭐⭐ | |
 | Rinnai Ru199iN Sensei Super High Efficiency | ⭐⭐⭐⭐⭐ | |
 | Ecosmart Eco 11 Electric Self Modulating Tankless Water Heater | ⭐⭐⭐⭐⭐ | |
 | Rheem 240V Heating Chamber RTEX-13 Residential Water Heater | ⭐⭐⭐⭐⭐ | |
 | Rinnai RU180iN Sensei Best Natural Gas Tankless Water Heater | ⭐⭐⭐⭐⭐ | |
 | Stiebel Eltron Tempra 36 Plus Best on-demand Tankless Water Heater | ⭐⭐⭐⭐⭐ | |
 | ECOTOUCH 9KW 240V ECO90 Best Instant Hot Tankless Water Heater | ⭐⭐⭐⭐ | |
 | Rinnai V914in Best Natural Gas Tankless Water Heater | ⭐⭐⭐⭐⭐ | |
 | Rinnai RUR98iN Ultra Series Best Condensing Tankless Water Heater | ⭐⭐⭐⭐ | |
 | Rinnai RUC98iN Twin Pipe Best Indoor Natural Gas Tankless Water Heater | ⭐⭐⭐⭐⭐ | |
 | Eemax EEM24027 Electric Tankless Water Heater | ⭐⭐⭐⭐ | |
 | Rheem RTEX-18 Electric Indoor Tankless Water Heater | ⭐⭐⭐⭐ | |
 | Bosch Mini Tronic 3000 T Best Tankless Water Heater for RVs | ⭐⭐⭐⭐⭐ | |
 | Rinnai V65eN Tankless Water Heater Best Outdoor | ⭐⭐⭐⭐ | |
 | Titan Electric Tankless Water Heater | ⭐⭐⭐⭐ |
Below we have the list of the top tankless water heaters that you must consider in 2021. Our tankless water heater reviews will help you decide the ideal option that you might have been looking for to install in your home.
1. Ecosmart Eco 27 (Electric) – (Best Overall)
For people who are more into electric tankless water heaters and want a long-lasting solution for a continuous supply of hot water, Ecosmart is a great option. No doubt, Ecosmart is one of the best tankless water heaters brands among the electric water heaters.
It is a water heater that works on 27 kilowatts and 240 volts; moreover, it requires 112.5 amperes for perfect functioning. It has 3 separate heaters of 9KW each which operate in a sequence which means it will not work as needed and will not put more load on the heater.
The Ecosmart tankless water heaters have a self-modulating technology, and it is easy to adjust and install. It is compatible with the pipe fittings of 3 by 4 inches. This water heater has a dimension of 17 X 17 X 3.25 inches.
This top tankless water heater will save the water cost for heating up to 50%, and it is an excellent choice for an instant and consistent supply of water. This Ecosmart water heater is highly efficient and durable, which offers easy replacement. You can easily install it indoors, and it will blend with the overall decor of your house because of its elegant design. It has led display for better checking of the temperature.
Ecosmart water heater is a perfect choice with advanced technology and can control 80-degree Fahrenheit’s temperature to 140-degree Fahrenheit. Moreover, the Ecosmart tankless water heater offers a lifetime warranty, which is the product’s best highlight. It can provide water between 2.7 gallons per minute up to 6.5 gallons per minute. No doubt, the Eco smart is the perfect choice for saving your money, and it is one of the best tankless water heaters on our list.
- Comes with the lifetime warranty
- Easy to install and has a self-modulating Technology
- Consistent and endless supply of hot water
- It can corrode easily
- Self troubleshooting can be a problem
2. Rinnai Ru199iN Sensei – Best Gas Tankless Water Heater
Need high quality and super-efficient water heater? This Rinnai high-efficiency tankless water heater is one of the highest efficient tankless water heaters available in the market. It has a flow rate of 11 gallons per minute, and the water heater works on natural gas. The high-efficiency water heater is great for using multiple showers simultaneously. Also, it has a maximum BTU of 199000.
It is a perfect water heater for residential areas, and it comes with a warranty of 12 months. It is the fastest water heater in the market as it provides instant hot water or can take just a minute or two for a big family home. This best residential tankless water heater will provide you endless water supply and functionality; the high performance is exceptional.
It also provides an efficiency of up to 93%, which is excellent as well. This high-quality and advance-Technology water heater is a perfect choice for people who are looking for a long-lasting water heater for hot water demand.
This Rinnai water heater will also save a lot of your valuable space, and you can easily install it in small places, not only that it is more affordable and sustainable. All these incredible features make this Rinnai water heater the leading tankless water heater among the rest of the brands.
The dimension of this water heater is 18.5 x 11.4 5×7 1.3 inches. And it weighs around 64 lbs. Moreover, this is a wall-mountable water heater that is the ideal choice for residential and indoor use. This best indoor tankless water heater does not require any batteries as well.
We can say that the overall functionality of this tankless water heater is the best. Also, the Rinnai brand has some of the highest-rated water heaters.
- High efficiency
- Does not require a lot of space
- Multiple showers can be used simultaneously because of a better flow rate
- Fastest and Quietest water heater
- A bit costly
- Installation could be difficult
3. Ecosmart Eco 11 – Self Modulating Electric Tankless Water Heater
The EcoSmart Eco 11 water heater is another great option from the brand Ecosmart. It could be your first choice if you are looking for an electric tankless water heater because of the lifetime warranty and efficient functionality. It is a super lightweight water heater that weighs only 6.5 pounds and has a dimension of 3.7 5 x 8 x 11.5 inches. Moreover, this water heater can save up to 60% of the cost of water heating and help you with saving money later.
It is also 99.8% energy efficient, capable of providing you a consistent water supply in no time. It is a perfect choice for people who are looking for a small water heater for a small Condo house. This is an excellent choice with an ideal supply of water. It has a flow rate of 3 gallons per minute. And it is a good choice for a tank of 50 gallons or even more.
If you are someone who is having hard well-water which contains more iron in it, this water heater is perfect for you as it has built-in technology that softens and cleans up the water itself and saves your time and energy. Moreover, those who have already been using this water heater for years reported that they saved their electricity after using Ecosmart Eco 11 tankless water heater.
The installation process for this tankless water heater is easy too and you can install it yourself. You will need three cables and a 60amp breaker for installing this water heater. A 60AWG separate circuit will be enough to run this tankless water heater which is pretty good.
- Lifetime warranty
- Lightweight and compact
- Energy Efficient
- Requires maintenance
4. Rheem 240V Heating Chamber RTEX-13 – Residential Water Heater
The next one on our list is this residential water heater that is a perfect choice if you more saving conscious and don’t want to spend more money on bills. This tankless water heater is an electric tankless water heater that functions on 240 volts. It is an ideal choice for indoor installation in residential areas.
Moreover, it has a flow rate of 3.17 GPM, making it an excellent choice for smaller houses but not the perfect choice for homes with two bathrooms. It is the best tankless water heater for one bathroom apartment. We can say, this is among the best tankless water heaters for condos.
It is a compact water heater that can be installed anywhere without any hassle. There is a thermostat also available with an LED display to adjust the temperature with more accuracy which is great. It comes with a complete instruction manual/cardboard pattern so that you can put the screws in the right place while installing.
This residential water heater is a perfect choice for power control and simple installation. It will provide you the energy efficiency of up to 99.8%, which is excellent. You can control the temperature as well on the digital thermostat of the water heater.
This water heater has a dimension of 12.6 3 X 8.25 X 3.63 inches and it uses a wattage of 13 kilowatts. Also, it is super easy to install, so no big issue in installation. You might think it is a little expensive, but it will provide you the excellent value for money because of the energy efficiency in the long term. It is a perfect choice for small houses with one bathroom.
If you are living in a cold area and need a tankless water heater with high flow and energy-saving, this Rheem 240V Heating Chamber RTEX-13 is the right choice for you as it takes just about a few seconds to provide an endless supply of instant hot water.
- Saves money in the long term
- The reliable and sustainable choice
- Easy to install and regulate the temperature
- Not good for bigger houses
5. Rinnai RU180iN Sensei – Best Natural Gas Tankless Water Heater
We are discussing another great option from the brand Rinnai. This RU189iN is an upgraded tankless water heater capable of providing you with super high efficiency and perfect water heating. It has a flow rate of 10 gallons per minute and has a maximum BTU of 180000.
The best part about this tankless water heater is that it allows you to simultaneously use up to 6 fixtures. This water heater will provide you with a consistent water supply without any energy loss. It is an excellent choice for saving money in the long term and it gets full points for environmental friendliness. This hot water heater works on natural gas, and it is a perfect choice for residential use.
One of the best tankless water heaters that come with a warranty of 12 months, and you can easily install it in your house. Now you no longer have to worry about the inconsistent supply of hot water in your home because, with this high quality and reliable water heater, you can always get hot water in a few seconds whenever needed. It can be a great choice for a home with up to 4 bathrooms. It is the best whole house tankless water heater in the market. You can run two showers at a time of hot water and a few faucets at the same time and still will be having enough supply for hot water.
This Rinnai water heater runs on natural gas, and its dimension is 18.5 x 11.4 5 x 7 .3 inches. Moreover, it is a perfect choice for residential areas and warehouses with up to two bathrooms. It provides up to 10 gallons per minute based on the water from the ground level.
It is easy to install and also comes with an installation manual so that you don’t have to worry about the installation process but still we recommend going with some verified installers. Once you have this tankless water heater installed, you won’t be going back to your traditional water heater for sure.
- Best for a family of 4 or 5
- Amazing Energy Efficiency
- Endless supply of water
- Easy installation
- Might have some warranty issues
- A bit costly
6. Stiebel Eltron Tempra 36 Plus – Best on-demand Tankless Water Heater
When you have narrowed down your searches for the best on-demand tankless water heaters, this Stieble water heater is the best choice. With the Stieble tankless water heater, you won’t run out of hot water ever again. The Eltron water heater will give you a continuous supply of hot water without delay.
It has got a modern sleek design which allows you to install it even in smaller spaces where other water heaters might not be able to fit. There is no requirement for venting for this Stiebel tankless water heater. It is also lightweight and can be easily mounted on the wall. It is an excellent choice for the people looking for a significant operation of the water heater.
This water heater is highly energy-efficient and provides you with a digital display to adjust the temperature better. You can always use it to adjust the temperature according to your requirement. The flow rate is also incredible, and it saves money in the long-term. The copper heating chamber helps you with quick heating of the water without any delay. Moreover, the technology that these best tankless water heaters use keeps the temperature constant without any glitches.
It is a very lightweight water heater that you can install anywhere you want without any significant hassle. The dimension of the water heater is 4.63 x 16.6 3 x 14.5 inches. Also, it is a perfect choice for the people who need an electric water heater. You can find out many other water heater models if you want a little more energy efficiency.
This water heater is a 36KW water heater, which is an electric water heater. It comes with a warranty of three years for the parts, and if there is any leakage, it has a warranty of 7 years. A long-lasting water heater that will provide you the ultimate support for a long time.
- Perfect for 2 bathroom homes
- Easy to use digital interface
- Not noisy at all
- Compact and sleek design
- Might have to face low pressure
- Warranty issues
7. ECOTOUCH 9KW 240V ECO90 – Best Instant Hot Tankless Water Heater
Do you need a water heater ahead of the technology? Do you need a water heater that is perfect to use and has a sleek and sophisticated interface? Well, the ECO TOUCH self-modulating instant water heater is the ideal choice in that case. It is the best water heater that you will find for instant heating of the water in the market. It is sleek, modern, and comes with all upgrade-able features that one needs.
The ECOTOUCH water heater is the best choice for safe and durable use. It is also convenient to use and has a digital display. You can use a touch system, mainly to adjust the temperature, which seems like an easy job. A space-saving water heater, which has a dimension of 15.4 x 10.3 x 2 inches.
Moreover, it is super stylish and modern, and it was perfectly blended with the overall theme of your house. It works on 9 kilowatt and 240 volts; it has a space-saving design that is 100% safe.
Energy efficiency is a great incentive for this tankless water heater. It can save energy up to 99.8%, which is a considerable amount of energy that will benefit you in the long term. It is one of the best point-of-use water heaters on the market that can be installed even under the sinks of your kitchen to get the hot water in just a few seconds.
The installation is no longer an issue for this ECOTOUCH water heater. However, the flow rate can be a little bit of a problem for bigger houses. It is appropriate for small homes with one bathroom that needs to use one shower or faucet at a time. A flow rate of 1.5 gallons per minute is available.
This tankless heater is a pretty good deal if you live in a one-bedroom Condo. It is an excellent choice for long-lasting use, but it may not be great for bigger houses.
- Incredible interface and easy to adjust the touch screen
- Simple and elegant design that blends well with the overall theme of home
- Easy to use and easy to install
- Best for kitchens
- The flow rate of this water heater is a bit low
- Can cause troubleshooting issues
8. Rinnai V914in – Best Natural Gas Tankless Water Heater
This V94IN is another one of the top-notch water heaters, a natural gas water heater that is easy to use. It has a flow rate of 9.4 gallons per minute, and it is easy to control. It is a highly efficient water heater that provides you an easy installation in the indoor areas. You can easily control the water heater with a mobile phone application without any difficulty.
This water heater will also help you to remotely control the water heater when you are not at home. You can put the system on vacation mode when you are away from home to avoid any leakage of gas for any other incident. With features like those, it is used by people who stay out of home most of the time and also need hot water when needed without being worried about the leakage when not being at home. It is an excellent choice for providing you perfect water supply for endless hot water.
There is a warranty available for 120 months if there is an issue with the heat exchanging. Also, there is a warranty of 60 months for the parts that might be faulty. Moreover, there is a 12-month labor warranty, as well.
Overall, it is a safe choice to save energy and get the perfect water supply any time you need. You can install it in your bathroom because of the suitable size. This water heater is a great choice that promises sustainability and reliability. The overall dimension of this water heater is 14.04 x 9.27 x 26.9 inches. And the weight of this water heater is 46.3 LBS. It is a highly functional water heater that uses natural gas. This is one of the quietest tankless water heater available in the market.
- Energy and budget efficient
- Long-lasting and easy to use
- Excellent investment for convenient water heating
- Quiet and smooth hot water flow
- Problems with venting
9. Rinnai RUR98iN Ultra Series – Best Condensing Tankless Water Heater
Next up we have another one of the tankless water heaters from the same company Rinnai. This is another one of the maximum capacity tankless water heaters with a flow rate of 9.8 gallons per minute. It is wi-fi enabled tankless water heater that enhances the water heating system’s functionality and performance. Moreover, with the wi-fi, you can easily control the temperature and adjust the setting according to your requirements.
This tankless water heater is a great water heater capable of saving energy, and it is a highly sustainable system. It is a great water heater that is compact and requires to be installed indoors. Compatible with the half-inch gas line, and it is made from innovative technology that makes the water heating system even better. It is recommended to use a Rinnai verified installer if you want to save cost and energy on the installation of your tankless water heater.
You no longer have to wait to get the hot water. With this tankless water heating system, you can quickly get hot water in no time. It is made from both concentric and PVC material, which enhances the venting and condensing of the water heater. Also, do not forget that it is a highly efficient water heater that can save energy up to 96%. After closely checking all the features, we would say it is an ideal water heater and also one of the top rater water heaters.
If you are a family of 5 or 6, this water heater is going to work best for you as it is one of the best tankless water heaters for large families.
- Long-lasting water heater
- 96% energy-saving
- Wi-fi enabled water heater
- Great for using up to 6 fixtures simultaneously
- The re-circulation function of this water heater does not work the best
10. Rinnai RUC98iN Twin Pipe – Best Indoor Natural Gas Tankless Water Heater
Looking for something that can be easily installed ind00r and doesn’t make much noise? Well, we have another one of the best indoor water heater installation systems that are perfect for bigger houses. It uses the fuel type of natural gas and saves energy up to 96%, making it extraordinary. It is excellent for high functionality and super incredible sustainability. This natural gas tankless water heater is easy to install and highly sustainable for long time use. Has a maximum BTU of 199000 and is also quiet while using it.
It is a compact water heater with a dimension of 10 x 18.5 x 26 inches that you can easily install in your house or your bathroom. Moreover, it weighs 82 pounds, and it has a flow rate of 9.8 gallons per minute. This water heater is excellent for having an instant water supply in up to 6 fixtures at the same time. It is only for indoor use.
You have a big family of 5-4 and you are moving into a new house or want to upgrade your old water heater with a new one, this could be your best choice. Rinnai has made its name in the market for making its products one of the best and their customer loves the products too.
This water heater also comes with 12 years warranty for the heat exchanger and a five-year warranty for the faulty parts. There is one early labor warranty available as well. You can use multiple faucets and showers at the same time with this water heater and it won’t disappoint you with its performance. With all the incredible features, this water heater by Rinnai is the perfect bang for the buck.
- Perfectly adequate water supply
- Comes with an extended warranty
- Energy-efficient and not noisy at all
- Easy to install
- Might drop the temperature sometimes
11. Eemax EEM24027 Electric Tankless water heater
The people who require an elegant and sleek-looking water heater that provides a bang on water supply with perfect performance; the Eemax tankless water heater is ideal. It is an instant water heater and gives you a consistent water supply in no time. This water heater is a highly advanced water heater that is self-modulating and helps you adjust the temperature and energy whenever needed. It is a super-compact size water heater that will provide you Perfect functionality.
For compact spaces, this water heater is a perfect choice because it will save a lot of your storage space without any doubt. It is the ideal choice for people for small living spaces. You can install it indoors only, and it has a flow rate of 5.3 gallons per minute, which is appropriate for a small house. Capable of providing you water simultaneously in up to three fixtures. It is an electric tankless heater of 240 volts in 27 kilowatts. The dimension of this water heater is 17 X 17 X 3.75 inches. This heater weighs only 13.75 lbs.
If you are going to replace your older water heater and looking for a stable and endless supply of hot water, this Eemax EEM24027 could be your choice. It takes a bit more electric power when you will turn it on but in the end, you will find a noticeable difference in your electricity bill. And you can also save the cost of installation as this can be so easy that you can just DIY at home.
- Compact and easy to use
- You can install it yourself
- Energy-efficient and sustainable
- Have an excellent customer service
- Warranty Issues
12. Rheem RTEX-18 – Electric Indoor Tankless Water Heater
The next on the list is the Rheem electric tankless water heater that is available in small size. It is an excellent choice for easy installation, and it is a perfect option for tiny houses with one bathroom. You can say, it is certainly one of the best tankless water heaters for condos.
It has a flow rate of 4.4 gallons per minute and has a simple installation process without any hassle. You can simply install it or replace it when needed. An incredible highlight of this product is the Digital temperature display that enables you to easily adjust the power and the temperature of the water heater. It is excellent with accuracy and also has an advanced self-modulation technology, which helps with the power modulation to meet the demand for hot water.
It has copper immersion, which will help you with better heating. And it is an excellent choice for long-lasting use. Moreover, it is an energy-saving product that will save money in the long run. No doubt, it is a significant investment and it is definitely a steal deal.
Also, the dimension of this water heater is 18.25 X 3.5 X 14.5 inches, and it weighs 14.8 Pounds. It is suitable for you to install it inside. For better maintenance, it is better to install it indoors, so it does not rust easily. It is a wall-mountable water heater that you can have in your bathroom. This water heater is an electrical water heater.
All in all, we can say Rheem tankless water heater is a safe choice for installation and for saving money. It is a long-lasting water heater that will serve you for a long while. Based on the tankless water heater ratings, Rheem RTEX-18 Chambers Residential Tankless water heater is the most efficient water heater.
- High-quality water heater
- Easy to operate, install and replace
- Perfect for small houses
- May have some temperature fluctuations
13. Bosch Mini Tronic 3000 T – Best Tankless Water Heater for RVs
The next one on the list is a shelf mounted or a floor-mounted water heater that is very compact. It is an excellent choice for water heating if you need a compact water heater. This high rated tankless water heater from Bosch provides 5.1 gallons per minute if it is mounted horizontally, and it can provide 7 gallons of water per minute if it is mounted vertically. A reliable water heater that enables you to have a consistent supply of water whenever needed.
It has a heating capacity of up to 1440 watts and can heat up the water from 65-degree Fahrenheit temperature to 145-degree Fahrenheit. An electric water heater with a dimension of 17.5 x 17.5 x 14.5 inches. This Bosch water heater will provide you an energy efficiency of 98%, which will help you with saving up a lot of money in the future. It is also a much more affordable option compared to the other electric water heaters on the list.
If you need a much more affordable choice, you should go for the Bosch electric Mini tank water heater; capable of providing you up to 7 gallons per minute. Moreover, the installation of this best value water heater is super simple and does not require a lot of effort.
Also, this water heater is the best tankless water heater for RVs because of its compact and portable design. You won’t be disappointed with the performance of this little champ from none other than Bosch.
- Easily mountable
- Great supply of water
- Convenient to use and install
- Best for RVs
- Not a very long-lasting choice
14. Rinnai V65eN Tankless Water Heater – Best Outdoor
The next one on the list is a natural gas tankless water heater that is a large water heater with a capacity of 6.5 gallons per minute. So if you have a large family and often have your guests visiting you and don’t want to run out of hot water supply in your home, this largest tankless water heater is made for you.
Not only that, this water heater is highly energy-efficient and doesn’t put loads on your pocket. It has a maximum BTU of 120,000 and offers an energy saving of 82 %. A perfect choice for outdoor installation if you don’t want an indoor installation water heater. This on-demand outdoor tankless water heater is recommended by many.
This one of the best tankless water heaters is a lightweight and compact water heater that is perfect for installation and use. You can easily have this water heater installed in your house for a consistent supply of water. You no longer have to wait a long while for getting the hot water; it will heat the water in just a few seconds. It is capable of providing hot water in up to 6 fixtures.
- Long-lasting water heater
- Easy installation
- Quick heating of water with a large capacity
- Easy to control
- Highly energy efficient
- Packaging and documentation have issues
15. Titan Electric Tankless Water Heater
Another reasonably priced water heater is the Titan Tankless Water Heater, which is ideal to use if you want a long-lasting heating solution. People who are using it have reported that it can last for 10 or even more years.
It has a dimension of 4.8 X 9.6 x 12 inches and weighs only 7.93 LBS. This is a great electric water heater that has an energy capacity of 220 volts and will help you save your budget too.
An excellent choice for the people who need easy to adjust and easy to regulate water heater. This high-quality space-saving water heater is a perfect choice for an endless supply of water whenever required. It is an energy-saving option built for medium home having 2-3 members.
Also, this water heater can be the best choice for cold climate areas where the temperature goes a bit more down than the normal winters as it heats the water to a maximum point.
- Great supply of hot water
- Long-lasting and compact
- Easy to install and control
- The warranty is not extended enough
Benefits of Tankless Water Heaters
What may be the benefits of choosing a tankless water heater? For starters, these heaters are great in all sorts of weather. They can accommodate and give a lot of people multiple choices of temperature in numerous weather conditions. A simple daily controls what temperature the person may want, and then the system heats the water accordingly every time. Though these may be a little slow on such changes since the fall only goes up one degree when you turn the dial.
This slow change may be irritating to some but does not entirely mean it’s a deal-breaker.
Easier for user
These heaters work on a very simple basis, heating water when the user requires it instead of continually heating water at all times, even when the user does not need hot water. This causes energy losses. The tankless water heater changes this perspective and makes it so much easier for the user to save on energy costs while still having an undisturbed supply of hot water whenever they require it.
Simple installation
These heaters are also very useful in places that are much smaller than a home, for example, a tiny apartment in an expensive city, an RV truck; these heaters are perfect for such installation since they don’t need an ample amount of space to work out of. They are mostly the size of a small suitcase and can easily be installed anywhere, either under the sink or above a shower, or in the back of an RV. These save space and money in such places and provide a lot of help to the people living in such conditions.
Ignition is great
Most of these heaters can start the ignition on the pilot by themselves, which is a little spark at the starting, which quickly makes the heater catch on to the ignition and start a pilot light, which makes the heating process even more comfortable.
Longer life expectancy
A life expectancy of a tankless water heater is much more than a tank water heater. These heaters last a good 20 years in their lifetime and then continue to be operational if they’re kept in the right conditions or if their parts have been replaced over time to ensure they work much better. This makes it an excellent investment at the start, and the upfront cost which the heater has is worth the price tag, and even after a very long time, you do not regret this decision.
Disadvantages
These are conventionally small, but such sizes also impact the flow rate of the heater. Though a tank heater can provide ample water throughout the day for an entire house, a tankless heater may fail to do so since it does not have the facilities or capacity to continuously provide for a household that says uses 86 gallons per day.
For bigger households, they require a few more of these tankless heaters to make up for the amount of water needed by the entire house.
Installation of multiple heaters may bring up the energy bills to the amount that may be spent on a tank water heater, making the entire purpose of the heater pointless and thus leading to a conflict of interest.
These need a professional installation since they are a little more complicated than the tank water heaters, which may cost you a little more. The initial cost of buying the entire system is much higher than a tank water heater.
Final Verdict
Considering all the best tankless water heaters that you have checked in the list above; you will be clear about choosing the perfect and ideal option. You can pick out the affordable option if you are running low on budget or pick a much more efficient and high-performance tankless water heater. Buying the water heater from the best tankless water heater brands can serves you the perfect functionality.
All in all, we recommend going with the Ecosmart Eco 27 Tankless Water Heater if you want an electric water heater and this is best overall. It has got all the advanced options that a user needs. And if you want to use a gas water heater then you should check Rinnai Ru199iN Gas Tankless Water Heater. And for RVs, we recommend the Bosch Mini Tank water heater because of its compatibility with RVs.
Check out the buying guide before you purchase the water heater and check out all the smaller details about the water heater. Do not get a water heater that does not comply with your requirements. You will end up wasting your money. Get a water heater that you can use for a longer Run and one that you can use to enjoy your warm, comfortable showers. Concluding the question, that is, what is the best tankless water heaters, this article has it all for you.
Buying Guide
Choosing the right size and type of tankless water heater
Before you finally make up your mind about getting a tankless water heater, you need to understand what size and type of water heater is the best fit for your need. The tankless water heater has an essential factor of the flow rate for the GPM that you require. But how will you determine the GPM of the water heater that you require?
Don’t worry! We can help you out in deciding whether you need an electric or gas tankless water heater or the water heater’s size.
Determine the flow rate
The flow rate is represented by GPM and known as gallons per minute; that a water heater can produce. When installing a water heater in your house, you must understand that the flow rate is significant when installing a water heater. If the flow rate is low, you might not like the limited amount of fixtures you can use simultaneously.
When you live in a small Condo with just one bathroom, the water heater with a flow rate of 3.0 GPM will work for you. However, if you have a house of thousand square feet, you will require a water heater that can produce 4 gallon permanent. Also, the home of up to 1600 square feet with two bathrooms need a water heater that is capable of providing up to 7.5 gallons per minute. And for larger houses, the flow rate can go up to 10 GPM.
One other thing that you need to consider when getting the tankless water heater is the temperature. The water heater has to be capable of heating the water properly. If the temperature of the water that you get is lower than 67-degree Fahrenheit, you should get a water heater with slightly more power and the one which has a better flow rate.
Choose the temperature rise in the tankless water heater
The water you get is typically at the temperature of a maximum 75-degree Fahrenheit, and it can be as low as 35 degrees Fahrenheit. When the climate is hot, the temperature does not matter as much; however, during the average or cold climate, you need to have a comfortable shower. Choose a water heater that is capable of heating the water at 100 to 105-degree Fahrenheit. Or if it is up to 110-degree Fahrenheit, it will be even better. Choosing the best tankless water heater for condos can be difficult because not all tankless heaters can provide you the perfect temperature rise.
Choosing the type of tankless water heater
The type of tankless water heaters another significant matter to consider. The tankless water heaters are available in both gas and electric types. However, it has to be your decision and based on your comfort. If you have a house with issues with the gas supply, or it is not possible for you to install a gas line, then electricity will be a great option.
If there is a chance of electricity failure too frequently, then gas has to be your choice. There are pros and cons for every type, but you need to be smart enough to understand the perfect choice for your house. Also, compare the sustainability and environmental friendliness of both the type of best tankless water heaters to determine which one to choose. If your primary concern is environmental friendliness, which it has to be, then look for a tankless water heater that does not emit carbon dioxide and makes the environment better.
How does the tankless water heater work?
The process of working with the best tankless water heaters is pretty simple and straightforward. The water heaters either run on electricity or use natural gas. The heat in the system or the heater box heats the water, and then the water is passed through the faucets and to your shower.
See, no rocket science!
Unlike conventional water heaters, the best tankless water heaters can heat the water in milliseconds using the heated coil or other options. This is why people choose a tankless water heater over a conventional water heater because of the fast heating of the water. You can set the temperature, and, in a few seconds, you will have the water heated at a particular temperature from your faucet or shower.
Isn’t it great!
However, the process of heating the water in the best tankless water heater depends upon the type of water heater you choose to install in your house.
How can you choose the ideal tankless water heater?
Traditional versus tankless water heater
Before anything else, you must determine whether you should choose the traditional water heater or a tankless one. While there are many incredible benefits of using the tankless water heater, there are some downsides.
The tankless water heater is not only convenient to use but also environmentally friendly. You can also quickly get the water heated in just a few seconds when using the tankless water heater. But the downside is that the tankless water heater is a little more expensive than the conventional water heater. This is where the traditional water heater wins the race as it is available in a much more cost-friendly perspective. People are also used to using the conventional water heater, and they don’t want to upgrade. However, if you are planning to upgrade, the tankless water heater has to be your choice.
Types of Water Heaters
Tankless water heaters can be run by electricity, propane, or natural gas. All three of these options have their pros and cons.
Electric tankless water heater
When you are using the electric tankless water heater, it will use up to 120 volts to 240 volts of power. These electric water heaters are useful during the cold season, but the low-quality options may not perform the best every time.
Propane water heater
If you wonder that it would be difficult for you to install a gas pipeline, then getting a propane tankless water heater is a perfect choice. It runs on an outside source of energy, and it is excellent in terms of functioning.
However, propane tankless water heaters are more expensive in the longer term. Besides the high price, we can say that the propane tankless water heaters are more energy-efficient. Also, the propane tankless water heaters are highly environment friendly.
Natural gas water heater
When you need a cost-effective tankless water heater, then going for the best gas tankless water heaters is a perfect choice. This water heater is not expensive; however, it may differ in performance and functionality. And as compared to the propane tankless gas heaters, it is less environmentally friendly.
Cost
The cost is a significant factor to consider when choosing the tankless water heater. There are a lot of best tankless water heater brands that have heaters which are much more expensive. Set a budget for a tankless water heater and decide the ideal choice accordingly.
Flow rate
The gallon per minute is the unit of flow rate that you need to consider. Usually, all the water heaters have this unit written exclusively on them. You just need to check what capacity your house requires, and if the water heater is capable of providing you are a similar water capacity. The game can range from 3.5 to 10 GPM. For smaller houses, 4.0 GPM is perfect, but you need to consider a water heater with 7.5 GPM or more for bigger homes.
FAQs
How long does it take for a tankless water heater to heat up?
Well, usually tankless water heaters take about 15 seconds to provide hot water to your set temperature, but you might also have to wait a few more seconds before the hot water reaches the faucet or the showerhead. The difference is different in each brand and type of tankless water heaters as well.
Which tankless water heater do we recommend you?
We have a list of 15 top-rated and best tankless water heaters. And from the tankless water heater reviews above, you can easily decide which one is the most appropriate and perfect option for your house. However, if you are still looking for our opinion, we will recommend getting the Ecosmart EC 27 tankless water which is the best performing water heater in all stages. Rheem tankless water heater is the best natural gas tankless water heater available in the market if you want to go for natural gas heating.
Compared to all the other water heaters available on a list, it is efficient and powerful. But we will also recommend you check out the other best-selling and most recommended tankless water heater options as well. If you still have a question in your head about who makes the best tankless water heaters, here is a quick answer. Rinnai, EcoSmart, and Rheem are the best tankless water heater brands.
Which is a better tankless water heater, propane, or electric?
Both of these types of water heaters have their own ups and downsides. But we would recommend you get a propane tankless water heater as it is capable of better efficiency and performance. We can say, the propane heater is the most efficient water heaters. Also, the other best tankless hot water heater includes a natural gas tankless water heater. You also need to consider the environmental friendliness of the propane best tankless water heaters. However, when looking for a much more budget-friendly option an electric tankless water heater will be a perfect choice.
Which is the best tankless water heater brand?
There are many different options in the best tankless water heater brands. But the one we consider the best brand is the Eco smart or the Rheem water heater brands. These brands are known for their water heaters’ excellent quality and the fantastic functioning of the water heater.