August 20

Top 10 Best Electric Tankless Water Heaters Reviewed In 2022

The demand for hot water is high in most homes. Most people use it to shower. Others use it to clean utensils in kitchens or remove grime from floors and countertops occasionally. To meet their demand, most people have depended on the best tanked water heaters for many years. Even though effective, most models are bulky. They require a lot of storage space that most homes lack. They are also “power thirsty.” Users grapple with expensive electricity bills to bath hassle-free and or clean better. If you are in the same boat, we have a better solution for you – tankless water heaters.

What are the benefits of installing tankless water heaters in homes? As their name suggests, tankless water heaters are household accessories that generate hot water instantly. Because they do not store water in tanks, their spacious designs blend seamlessly in homes. Water output is hot and consistent, while their propane and electricity-powered designs are super-efficient. To improve how you bath or clean, thus, do not hesitate to install one in your home. The 10 models that we have listed, for instance, also have Eco-friendly designs that will lower your carbon footprint.

10. Stiebel Eltron

Top 10 Best Electric Tankless Water Heaters Reviewed In 2022 1

Judging by their popularity all over the world, tankless water heaters are must have accessories in homes. Stiebel Eltron, for instance, is a versatile model that has helped people to shower and clean better while keeping operation costs low. With one, you get a two in one mini heater that works well in homes. Its space-efficient design, for instance, is easy to install in most areas. You can install in in your basement or attic, for instance, without cluttering personal space. It also has a sleek design with a universal mounting system that eases its installation.

Tanked water heaters can only store and heat a specified amount of water at a time. In large homes where many people prepare for work or school in the morning, this is often a challenge considering their low capacity designs. With Stiebel Eltron, however, you do not have to worry about running out of hot water. Because it heats water instantly, you can enjoy long showers or fill your bathtub with hot water without inconveniencing others. Its minimum flow rate (0.21GPM) is also impressive, while its well-engineered design lasts long. For regular medium-sized families, this tankless water heater works the best. You get a three-year warranty for defects and a seven-year warranty for leakage with each original model you buy.


  • Warranties for defects and leaks
  • 0.21GPM minimum flow rate
  • Space-efficient design
  • Instance access to hot water
  • Low maintenance design


  • Requires a contractor to install

9. Eccotemp EM-2.5

Top 10 Best Electric Tankless Water Heaters Reviewed In 2022 2

Every day, millions of people waste millions of cubic liters of water as they wait for their showers to heat up. Considering that access to clean water is dwindling by the day, this is a worrying though. There is a good solution, though. Consider replacing your existing water heater with this minimalist tankless model to notice dramatic changes. It has a water-efficient 2.5-gallon system. It is also power efficient and has a well-engineered system that withstands abuse well over the years.

Are you tired of the huge tanked water heater in your basement that wastes a lot of space? To enjoy better space and power savings without compromising access to hot water, Eccotemp EM-2.5 works the best. It has a compact design, for instance, that you can install virtually anywhere. Whether you have a small space in your basement or in your attic, you will have good results with an original model. Because of its universal mounting system, installation is also a breeze. You can fit it either on the floor or on your wall with a few basic tools.

Eccotemp EM-2.5 is a durable accessory. It has a pressure and temperature relief valve for safety. It also has an adjustable temperature control (40-140 degrees) for customizing its performance and a short 25-40-minute recovery time.


  • Temperature relief value
  • Pressure relief valve
  • 25-40-minute recovery time
  • Adjustable temperature (40-140 degrees F)
  • Universal mounting system
  • Minimalist 2.5-gallon system


  • Mineralizes easily

8. iHeat S series

Top 10 Best Electric Tankless Water Heaters Reviewed In 2022 3

Do not let this heater’s compact design fool you. If you are tired of your wasteful instant water heater or your inefficient tanked one, be ready for the time of your life. Perfect for use in homes, apartments, and hotels, its smaller footprint does not clutter personal space. It is also power efficient and has an impressive 2.3GPM system that will satisfy your watering needs. Buy yours to wave goodbye to fights over warm water at home. Instead of using your electrical jug for boiling bath water, you can use it for its intended purpose – making tea or coffee.

The thought of your electrical heater exploding because of over-pressurization or a faulty electrical circuit is traumatizing. With iHeat S series, however, you get a well-made product with a safe and functional system. UL approved, for instance, it is ideal for commercial and personal use. It is also lead-free (certified) and has a heavy-duty stainless steel case that does not buckle under pressure. Finally, this water heater has an advanced power modulation microprocessor that complies with Canadian and USA safety standards.


  • Complies with Canadian and US safety standards
  • Heavy-duty stainless steel case
  • Certified lead-free
  • Advanced power modulation microprocessor
  • 2.3GPM system
  • Space-efficient design


  • Slow heating

7. Marey ECO

Top 10 Best Electric Tankless Water Heaters Reviewed In 2022 4

Many people associate water heaters with loud noise and expensive power bills. If you share a similar though, chances are that you have the wrong type of product at home. Replace it with this Marey ECO tankless water heater to better your experience. Even though electricity powered, its 110-volt system does not consume a lot of power. It is also super reliable and has an adjustable temperature. Do not waste money on one of the complicated models that cost a fortune on Amazon.

Do you have space limitation at home? Forget about the bulky tanked water heater that you are planning to install. Instead, choose Marey ECO to get a compact day-to-day water heater that never disappoints. Installation is a breeze. It is also durable and has a low-pressure system that works with most faucets. At full capacity, you get around 3GPM with this tankless water heater.

If you have a tight budget, this heater is affordable. It attaches directly to standard water fixtures (no need for plumbing) and comes with a 5-year warranty.


  • Five-year warranty
  • Fits most standard fixtures
  • Cost effective design
  • Power-efficient system
  • 3GPM output
  • 110-volt electrical system
  • Adjustable temperature
  • Detailed instructions


  • Heats up slowly

6. Atmor AT-900-03

Top 10 Best Electric Tankless Water Heaters Reviewed In 2022 5

Atmor AT-900-03 is a 3.4-pound water heater with an electric instant heating technology that works like a charm. Forget about the cold showers that you take occasionally because of your inefficient model. It also has a super-reliable design with a high-powered 300-watt system that meets the needs of most individuals.

Because of the low flow faucets that some people have at home, they cannot use most of the best electrical shower heads available in stores. With Atmor AT-900-03, however, you do not have to worry about water pressure. Its low minimum activation rate (0.5) works well with most faucets. Moreover, because it has overheat protection, the threat of it burning out because of low water pressure is very low.

Atmor AT-900-03 has a wall-mountable design that you can install in most areas of your home. Its UL-certified system is power efficient, while the warranties you get (7-year leakage and 2-year parts) mirror its value.


  • 7-year leakage warranty
  • 2-year warranty on parts
  • UL-certified electrical system
  • Low minimum activation rate (0.5)
  • Overheat protection


  • Requires a 30 Amp single-phase breaker

5. Bosch GL4S Ariston

Top 10 Best Electric Tankless Water Heaters Reviewed In 2022 6

If you have used some of the power tools in the market, you most probably have a Bosch. A dominant player for many years, it has also delved in the tankless water heater niche, where it remains sought-after. If you appreciate the brand and want to improve how you access hot water at home, Bosch GL4S Ariston is the best water heater to use. Tankless, for instance, it has a space-efficient design that does not clutter personal space. It is also durable and has an advanced point-of-use system that generates up to four gallons of hot water per minute.

Ranked among the best products in this niche, Bosch GL4S Ariston has a versatile design that works with most faucets. You can connect it to your shower directly, for instance, and access hot water on demand. You can also connect it to your kitchen sink or any other faucet of your liking that uses fresh water. This eliminates unnecessary plumbing. It also eliminates the need for hard wiring, which most contractors charge premium amounts. Bosch GL4S Ariston has a 6-year limited heat exchanger warranty.


  • Six-year heat exchanger warranty
  • Works directly to most faucets
  • Plug and use design
  • 4GPM system
  • Space-efficient design
  • Efficient thermostat
  • Inexpensive to run


  • None

4. Stiebel Eltron Tempra

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Some people claim that tankless heaters cannot satisfy the hot water demands of large families. This is further from the truth. With Stiebel Eltron Tempra, for instance, you get a reliable whole house heater with many desirable attributes. Because it is tankless, for instance, you do not have to install a big and loud tank in your basement or attic to access hot water. This heater is smaller, durable, and has a reliable system that produces hot water constantly.

If power consumption is a concern, you will not regret installing this tankless water heater at home. Its efficient system lowers power consumption by about 15-20%. For those looking to introduce cost-cutting measures at home, start with this tankless water heater. You also get easy-to-use digitized controls and a sleek housing that does not lower the value of homes.


  • 15-20% more efficient
  • Easy to use digitized controls
  • Space-efficient design
  • Sleek and durable housing
  • Reliable whole house system
  • Advanced flow control technology


  • Sensitive to chemicals

3. Rheem RTE 13

Top 10 Best Electric Tankless Water Heaters Reviewed In 2022 8

A popular product in the tankless water heater niche, Rheem RTE 13 has improved how people heat water for their homes. Cheap, for instance, it is an excellent tankless heater for those with a tight budget. It is also quieter than most tanked heaters and has a 4.0GPM single unit with a rugged heat exchanger (copper and brass). Over time, it does not heat up nor lose its efficiency because of mineral build-up.

Forget about your water getting too hot or too cold whenever you are having a bath. With this systems responsive temperature control, expect a memorable time always. Its 1/2-inch water connection port fits most standard outlets, while its ability to modulate power lowers running costs further.


  • Fits most standard faucets
  • Modulates power automatically
  • Responsive temperature control
  • 4.0GPM single unit
  • Copper/brass heat exchanger
  • Cost effective
  • Energy Star certified


  • Warranty issues

2. Ecosmart ECO 27

Top 10 Best Electric Tankless Water Heaters Reviewed In 2022 9

Do you live in a cold environment? Do you use a lot of hot water for bathing or for washing utensils? This high throughput tankless electric water heater by Ecosmart will serve you the best. With its patented self-modulating technology, for instance, you will enjoy greater cost savings as you use hot water at home.

As most products listed, Ecosmart ECO 27 has a compact design that does not clutter homes. Installation is simple while the copper and stainless steel materials used to make it are professional-grade. Expect power savings of up to 60% with this 27kW tankless water heater at home.


  • 60% power saving
  • Copper and stainless steel parts
  • Compact and clutter-free design
  • Patented self-modulating technology
  • Lifetime warranty


  • Sensitive to chemicals

1. Eccotemp L5

Top 10 Best Electric Tankless Water Heaters Reviewed In 2022 10

Eccotemp L5 by Eccotemp Systems is our pick of the best tankless electric water heater in 2022. This portable household device has a water output of around 1.4GPM. While this is insufficient for large or medium-sized homes, it works well in hotels and bachelor suites. It also has an impressive minimal flow ignition rate (0.3 liters per minute). This benefits people with low flow water faucets.

Do not worry about cluttering your home with a tanked water heater. This model has a compact design that installs out of sight. You also get a shower nozzle, a garden hose adapter, and a one-year warranty on parts.


  • One-year warranty on parts
  • Space-efficient design
  • Minimal flow ignition rate (0.3 liters per minute)


  • Only 1.4GPM


In stores such as Amazon, you will come across two types of water heaters – tanked and tankless ones. The former is bulky and inefficient. The latter, on the other hand, has a compact and efficient design that keeps power costs down. The 10 we have reviewed are also durable and have versatile systems that work with most water faucets.

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    The Eccotemp L5 Portable Tankless Water Heater is not electric. Is it?

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