Top 10 Best Tankless Water Heaters in 2021 Reviews

Upgrading from a tank water tank to a tankless water heater is one of the greatest decisions you can make for your family. Not only will you have continuous on-demand hot water, but you’ll also immediately see energy savings of up to 60%. Other than that, a high-efficient tankless water heater can last for at least 20 years in comparison to the 15 years of the electric tank heater. Better still, even the largest tankless water heater needs less maintenance and takes up far less space than a tank system with a storage tank.

There are many tankless water heater brands in the market, and without checking well, you may end up buying a model that does not match all your needs. However, we have you covered, upon researching dozens of these units, we got the top 10 best tankless water heaters. Also included is a set of factors you need to consider before making a buying decision. Let’s embark on the list.

#1. Stiebel Eltron 23 Eco On-Demand Hot Water Tempra 29 Plus Tankless Water Heater (White)

Never will your hot showers be interrupted anymore with the Stiebel Eltron electric tankless water heater. With the advanced flow control system, you can maintain constant water temperatures. This can change water flow depending on the hot water demands. Since it has a compact design, you will never have to worry about taking much of your storage space. Ideally, it measures water flow and saves energy with auto modulation to reduce your energy costs. The digital temperature display accurately shows the temperature settings just in case you need to make any adjustments. Installation is such a pretty easy task though it would be nice to get a professional to prevent some errors.

Features:

  • Offers you a continuous and reliable water supply
  • Equipped with easier to operate preset buttons
  • Has a sleek design to minimize storage space
  • Can be easily mounted on the wall or closet
  • Operates quietly to avoid any disturbances

#2. ECOTOUCH 5.5Kw 240V Point-of-Use Digital Display Tankless Electric Water Heater (White)

When you are out camping with your family, you can enjoy a hot shower with an Ecotouch tankless water heater. It features a 5.5KW heating system that supplies instant and consistent hot water. Depending on the flow rate and temperature settings, this water heater will automatically adjust the power input. Temperature setting becomes such an easier task because it is equipped with a digital display and touch control panel. Better still, the black model comes with remote control for convenient customization. This makes it a great gift for your loved ones.

Features:

  • Has a lightweight design for easier installation and transport
  • The lines run separately to avoid scale buildup and leakages
  • Ideal for use in schools, kitchens, bars, hospitals, and more
  • Goes through all strict test this safer for everyday use
  • You can mount it vertically, horizontally, or obliquely

#3. Bosch ES4 4 Gallon Convenient 3000T Mini-Tankless Electric Water Heater for Hot Water

Bosch Thermo technology tankless water heater is equipped with a wide range of features to meet all your needs. It is equipped with a 4-gallon water tank that can easily fit under your sink and provide you hot water at any time. This unit features a glass lining material that assures you of longer usage life. You no longer have to wait longer since it supplies hot water instantly to two sinks at the same time. Additionally, you can either mount it on the wall, floor, or shelf as per your needs.

Features:

  • Can be easily mounted for independent installation
  • Matches most home decors with its simple design
  • You can install it in kitchenettes, patios, and more
  • The pressure relief valve enhances safety
  • Has a glass lining for easier maintenance

#4. Rheem Durable Copper RTEX 240V Heating Chamber Tankless Water Heater (Grey)

Are you looking for a lightweight tankless water heater? Look no further than the Rheem tankless water heater. It only weighs 0.01 ounces thus it is easier for you to carry it from one place to another. This unit offers a continuous hot water supply for multiple applications or single point use. The thermostatic control has an LED display that allows you to adjust settings to meet all your needs. With the included screws and clear instructional manual, it will take you a few minutes to fully install this device. To ensure leak-free operations, you should always fit the connectors correctly.

Features:

  • Made sturdy to offer you stable and safer tasks
  • Smaller in size thus takes less storage space
  • Takes up to 30 seconds to heat your water
  • Ideal for use in the office with a good flow rate

#5. Eemax Self-Modulating Tech Instant & Consistent Tankless Electric Water Heater (Blue)

If you have a smaller space and you need hot water, you can try installing an Eemax tankless water heater. It has a small and compact design thus it takes less storage space in your kitchen or apartment. Since it only weighs 8.08 pounds, you can easily transfer it from one corner of your house to another without facing any difficulty. Besides, it is constructed from high-grade stainless steel components well known for their durability, strength, and rust resistance. Installation is such a hassle-free task since it only takes a few minutes. That aside, it requires a 60amp breaker to keep your water hot at all times.

Features:

  • Suitable for commercial or residential water heating
  • Heats up at a faster rate to deliver hot water quickly
  • Has a water consumption of 2.5 gallons per minute
  • The adjustable settings make it easier to program
  • Ensures leak-free operations with correct fittings

#6. Atmor 4.6 GPM 24kw/240V AT-910-24TP Digital Electric Tankless Water Heater (Grey)

When it comes to a high-quality tankless water heater, you can put your trust in this brand by Atmor. It features a stainless steel construction which offers you a unit with a long usage life. The digital temperature control is well designed to ensure easier adjustment of settings to meet all your needs. You can use it in small to medium-sized rooms which run up to 4 applications all at the same time. With the advanced self-modulating technology, it will regulate the amount of energy required to heat your water. Additionally, you can easily install it anywhere around your house it does not take too much space

Features:

  • Saves your storage space with its sleek design
  • Weighs only 17 pounds for convenient transport
  • The digital panel ensures easier operations
  • Requires no venting thus easier to install
  • Well certified thus safer for everyday use

#7. CAMPLUX 3.5KW 120V Point-of-Use Instant TE04 Tankless Electric Water Heater (White)

Colder seasons require the use of hot water and therefore you might want to try out this tankless water heater by Camplux. It has a compact design thus it won’t take much of your storage space. With this, you can mount it in your kitchen, wet bar, schools, saloon, hospital, and many other places. Featuring a digital display and smart touch control, which makes it easier for you to adjust settings as per your desires. Moreover, it is equipped with stainless steel and copper components which assures you a reliable performance from this long-lasting unit.

Features:

  • Well certified thus leak-proof and free from overheating
  • Allows you to adjust your settings with one-touch
  • Multifunctional thus can be used in varied places
  • Saves energy when installed close to the outlet
  • Instantly heats water with no preheating

#8. iHeat 7.5lbs Stainless Steel S-16 240V 16KW 66A Electric Tankless Water Heater

Whether you are in the ocean or outdoor kitchen, iHeat tankless water heater offers you the best results. It is designed from high-grade stainless steel materials well known for their strength, durability, and rust-resistant. This unit can be used during highly sterile applications in hospitals, schools, commercial kitchens, and clinics. You no longer have to worry about the installation space because it has a compact design thus it can fit into your closet or countertop. Additionally, the waterproof interactive touchpad allows you to easily customize your settings to meet all your needs.

Features:

  • Requires less than 30 seconds to get your water hot
  • Ergonomically designed for comfortable operations
  • Has a lightweight design thus more portable
  • Takes a few minutes to fully assemble it

#9. Ecosmart Self-Modulating Technology 18KW 240V ECO Tankless Water Heater (White)

For a convenient and continuous supply of hot water, all you ever need is an Ecosmart tankless water heater. It features correct sizing thus providing the needed hot water since it heats water as it passes through it. You can as well mount it on the wall of your need to save your floor space since it is smaller compared to a normal tank. With advanced self-modulating technology, this unit will only use the needed amount of energy. The digital temperature control makes it easier for you to adjust the settings as per your desires. Finally, it is made sturdy to ensure safe and stable operations.

Features:

  • Does not require any regular maintenance for better results
  • Comes with a clear instructional manual for setup
  • Able to heat 2.5 gallons of water in just a minute
  • Designed from quality materials that last longer
  • Smaller in size thus takes less storage space

#10. RINNAI Gas/10 RU180 in-Natural 10GPM Indoor Electric Tankless Hot Water Heater

You can never have to schedule your hot water needs with Rinnai this tankless water heater by Rinnai. This unit offers you a continuous and endless supply of water so that your heater will never have to run out of hot water. With the Thermacirc360 technology, this item will always circulate hot water through the entire water system. Its compact design makes it easier to install it in smaller spaces such as apartments. Also, it saves you a greater deal when it comes to energy cost since it is only used when needed. You would not for longer periods for hot water since it heats up at a much faster rate.

Features:

  • Has a faster flow rate of 5.3gpm to save time
  • Well packaged to ensure easier assembly
  • Suitable use on small or medium homes
  • Features accurate and easy to set settings
  • Saves you space of up to 16 square feet

Factors to Consider When Buying the Best Tankless Water Heater

Size & Flow Rate

First and foremost, you need to consider the size of the tankless unit because of its impact on the overall hot water delivery rate. For example, if you require hot water for your whole home, then you require a larger unit to ensure it meets all the demands of the household members using the faucet. Smaller units that have a flow rate of about 0.5 gallons per minute may only function for a single faucet or bathroom, even though they can also supplement the existing water heater. It is important to also note that if you live in colder environments, then you need a larger model that has a higher flow rate to be capable of producing the same quantity of hot water than a smaller one produced at a warmer temperature.

Energy Efficient

This is another factor that plays a vital role when it comes to most household electrical appliances. Everyone desires to buy a unit that does not consume a lot of electricity. In that regard, you’ll have made a better decision by opting for a tankless water heater. The idea behind the invention of this unit as a replacement for the traditional water heater is to save on electricity bills in a greater way. Even that being the case, that does not guarantee that all the tankless water heaters are energy-efficient, instead, you need to look for energy star qualified models.

Electric or Gas Water Heater

Of course, tankless water heaters use one of the three main power sources: propane, natural gas, or electricity. In some instances, the type of water heater you purchase is fully dictated by the power source available in your home, and as such, you will not have any say in that matter. Either way, it is prudent to know the best option that you like the most if you are lucky to have more than one power source.

Conclusion

If you look forward to having hot water on the go, then you need to consider having a portable tankless water heater. We have reviewed several options above, and without any doubt, we are certain that you’ll come across the brand that meets all your needs. Also, we have listed three main factors that you need to keep a close eye on as you try to separate the chaff from the wheat. We wish you nothing but the best shopping experience!

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