20 Best electric tankless water heater

There are many reasons why people choose an electric tankless water heater over other options like gas and electric models. For one thing, electric tankless water heaters can provide hot water on demand. This means that you don’t have to wait for the hot water to be delivered by the water heater. Instead, you can have it when you need it most without worrying about having a complete tank of cold water at home. Electric tankless heaters also provide instant hot water unlike the gas models that take a longer time to heat up.

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EcoSmart ECO 11 Electric Tankless Water Heater, 13KW at 240 Volts with Patented Self Modulating Technology
2,509 Reviews
EcoSmart ECO 11 Electric Tankless Water Heater, 13KW at 240 Volts with Patented Self Modulating Technology
  • Lifetime warranty
  • Save up to 60-percent on your water heating cost with an ECOSMART electric tankless water heater
  • Never run out of hot water with an ECOSMART tankless water heater
  • Patented Self Modulating Technology and design
  • ECOSMART tankless water heaters are 99.8-percent energy efficient.Uniform Energy Factor:0.98
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Rheem RTEX-18 18kW 240V Electric Tankless Water Heater, small, Gray
  • External digital thermostatic control with LED display (+/1 degree accuracy)
  • Most advanced self-modulation, adjust power to meet hot water demand
  • Durable Copper immersion two heating elements, field Serviceable. Flow Rate- up to 4.4 GPM
  • Simple installation – bottom 3/4 inch NPT water connections
  • Threaded for easy replacement, simple installation, digital temperature display
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ecosmart ECO 18 Electric Tankless Water Heater, 18 KW at 240 Volts with Patented Self Modulating Technology,White
  • The product is highly durable
  • The product is easy to use
  • Manufactured in China
  • Copper and stainless components
  • Lifetime warranty for residential use
Rheem RTEX-24 24kW 240V Electric Tankless Water Heater, Gray
  • ON/OFF Dial Control with adjustable digital temperature display
  • Self-modulating power control
  • 24kW Model Flow Rate: up to 5.9 GPM for RTEX-24
  • Bottom 3/4" NPT water connections
  • On demand, consistent and continuous hot water
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Ecosmart ECO 36 36kw 240V Electric Tankless Water Heater
  • Sleek and compact design with digital output temperature display
  • ECOSMART tankless water heaters are 99.8-percent energy efficient
  • Manufactured in United States
  • Pipe Fittings:3/4 inch NPT
  • Required Breaker:4 x 40 A
Rheem 240V Heating Chamber RTEX-13 Residential Tankless Water Heater, GRAY
  • External adjustable digital thermostatic control with LED display (+/1 degree accuracy
  • Durable Copper immersion two heating elements, field Serviceable.Self-modulating power control
  • Simple installation – 1/2 NPT adapters included; side 1/2 inch Compression water connections
  • 99.8% energy efficient. External controls to adjust temperature in increments of 1°f. Water-Saver Shower Head – 1.5 GPM
  • Threaded for easy replacement, simple installation, digital temperature display 54 A. 13kW Model Flow Rate: up to 3.17 GPM
Ecosmart ECO 24 24 KW at 240-Volt Electric Tankless Water Heater with Patented Self Modulating Technology
  • Lifetime warranty
  • Save up to 60-percent on your water heating cost with an ECOSMART electric tankless water heater
  • Never run out of hot water with an ECOSMART tankless water heater
  • Patented Self Modulating Technology and design.Activation flow 0.3 GPM
  • ECOSMART tankless water heaters are 99.8-percent energy efficient
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EcoSmart 8 KW Electric Tankless Water Heater, 8 KW at 240 Volts with Patented Self Modulating Technology
  • The product is highly durable
  • The product is easy to use
  • Manufactured in China
  • Heating elements are durable and are threaded for easy replacement
  • Activation Flow - 0.3 GPM
Rheem RTEX-04 3.5kW 120V Point of Use Electric Tankless Water Heater, Gray
  • Compact and stylish with digital temperature control in increments of 1f ranging from 80f to 140f
  • RTEX04 and RTEX06 only show output temperature and are non thermostatically controlled
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Bosch Electric Mini-Tank Water Heater Tronic 3000 T 2.5-Gallon (ES2.5) - Eliminate Time for Hot Water - Shelf, Wall or Floor Mounted
  • CONVENIENT HOT WATER HEATER: 2.5 gallon point-of-use mini-tank fits under your sink to provide hot water right where you need it. Thermal efficiency is 98%. Dimensions : 13.75 W x 13.75 H x 10.75 D Inches
  • LONG LASTING QUALITY: This electric water heater is easy to maintain and has premium glass-lined material for a long service life. (Amps 12A, Volts (VAC) 120)
  • INDEPENDENT INSTALLATION: 36-37" cord plugs into a 120 volt outlet for independent installation or in-line with a large hot water source
  • FAST RECOVERY RATE: Eliminates long waits for hot water at your sink, get on demand hot water at your every need (supplies up to 2 sinks at a time)
  • EASILY MOUNTED: Can be shelf, wall or floor mounted (bracket included); simply tap into the cold water line and install the water heater directly at the sink to provide hot water
Rheem 240V 4 Heating Chambers RTEX-36 Residential Tankless Water Heater, GRAY
  • External digital thermostatic control with LED display (+/1 degree accuracy)
  • Most advanced self-modulation, adjust power to meet hot water demand
  • Durable Copper immersion four heating elements, field Serviceable
  • Simple installation – bottom 3/4 inch NPT water connections
  • Threaded for easy replacement, simple installation, digital temperature display.Amperage:150 amps.A max flow of 8.0 GPM
Rheem RTEX-11 11kW 240V Electric Tankless Water Heater, Gray
  • ON/OFF Dial Control with adjustable digital temperature display
  • Self-modulating power control
  • 11kW Model Flow Rate: up to 2.68 GPM
  • Side 1/2" NPT water connections
  • On demand, consistent and continuous hot water
Stiebel Eltron 224199 240V, 1 Phase, 50/60 Hz, 24 kW Tempra 24 Plus Whole House Tankless Electric Water Heater, Advanced Flow Control
  • Digital temperature control. Voltage : 240 Volt or 208 Volt
  • Proven reliability
  • No venting required
  • Sleek design fits anywhere
  • Save at least 15-20% on the hot water portion of your electric bill
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Ecosmart POU 3.5 Point of Use Electric Tankless Water Heater, [email protected]
  • Can provide hot water for one sink at 0.5 GPM in warmer climates
  • Requires 1 x 30 amp breaker and 10 AWG wire
  • For one sink at 0.5 GPM in colder climates the POU 6 is recommended
  • Amperage Draw 29 amp. kW - 3.5 kW
  • Connection Fittings 1/2" NPT
Stiebel Eltron Tankless Water Heater – Tempra 24 Plus – Electric, On Demand Hot Water, Eco, White, 20.2
  • CONTINUOUS FLOW – Advanced Flow Control patented technology invented by Stiebel Eltron, automatically maintains water temperature for constant comfort. It’ll reduce flow slightly if hot water demand exceeds capacity. Hot showers will never be interrupted again
  • SPACE & ENERGY SAVER – Its small, sleek white design saves space yet still provides endless hot water for your whole house, and no venting is required. Eco friendly unit saves energy with auto-modulation and the ability to electronically control water flow. Savings monitor even shows how much you save on energy costs
  • EASY OPERATION – Electronic switch activates the hot water heater and it’s noise free while in use. Has a digital temperature display and preset temperature and memory buttons, while the interior solid copper heating system does all the power work
  • TEMPRA 24 PLUS – This specific model is 24kW, 240V, requires a min recommended electric service of 150 A, and offers an output water temperature of 68° to 140°F. Check our guides below to compare features of our various Trend and Plus models, each available in different kW levels
  • WARRANTIES INCLUDED – Stiebel Eltron’s top-rated electric tankless water heaters perform with the highest standards for comfort and reliability. Our 7-Year Leakage and 3-Year Parts Warranties are included with purchase
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Titan Electric Tankless Water Heater
  • Tankless Water Heater
  • 220 V
  • 54 Max Amps
Rinnai Indoor Tankless Hot Water Heater / RL94IN / Natural Gas / 9.4 GPM
490 Reviews
Rinnai Indoor Tankless Hot Water Heater / RL94IN / Natural Gas / 9.4 GPM
  • Energy Factor of .82
  • Built-in Rinnai Circ-LogicTM recirculation program cycles an external pump at pre-set intervals and temperatures to maximize efficiency and comfort
  • Certified for Installation in Manufactured (Mobile) Homes
  • Enhanced scale detection lessens possibility of serious, long-term damage to unit
Rheem RTEX-06 6kW 240V Point of Use Electric Tankless Water Heater, Gray
  • Push-button ON/OFF control with LED temperature display
  • 6 kW Model Flow Rate: up to 1.0 GPM
  • Perfect for 1 or 2 sinks
  • Bottom 1/2" NPT water connections
  • On demand, consistent and continuous hot water
Hyperikon Tankless Water Heater Electric 11kw, 180-250V Compatible, 106.7 Amps, 0-87 PSI, ETL Listed, NFS Approved with Integrated Temperature Sensor, Residential, Indoor
  • INSTANT HOT WATER - Enjoy never-ending hot water at any time of the day! It has a heat capacity of 37,543 BTU. Use the touch enabled control panel to set your desired temperature between 86°F and 126°F.
  • MINIMUM WATER FLOW 0.85 GPM - The minimum water flow for activation is 0.85 GPM. The power used is based on the gallons of water used per minute.
  • ENERGY-EFFICIENT - Hyperikon’s 11kw tank-less water heater will only draw the amount of electricity required to produce the hot water, with no pre-heating.
  • THREE 50A CIRCUIT BREAKERS - Connect this tankless water heater to 3 minimum 50A Circuit Breaker. Please refer to the installation manual before installing. The on demand water heater is leakage proof and also over-heat protected at 153°F (67°C)
  • 5 YEAR WARRANTY - When we say we've got you covered, we mean it. Should your product fail within the first 5 years from the date of purchase we will fulfill our promise and replace it free of charge to you.
Eemax SP3512 Electric Tankless Water Heater, 120V 3.5 kW, Only for 0.5 GPM sinks
  • Ease of installation - No T and P valve needed - Only bring one cold water line to lavatory
  • Connections: 3/8-Inch compression fittings at top of unit
  • Voltage: 120V, Power: 3. 5kW
  • Temperature rise at . 5GPM = 48 Degree Fahrenheit, Turn on: 0. 5. Dimensions: 10. 75-Inch W x 5. 25-Inch H x 3-Inch D
  • Amperage: 29

Electric Tankless Water Heater Systems Advantages and Disadvantages

An electric tankless water heater has a thermostatically controlled heating element that varies the flow rate of water to match the temperature requirement of users. When the flow rate is set to high, it provides hot water when you want it. And when the flow rate is set too low, it saves energy because it only heats water when the temperature is appropriate.

There are several types of electric tankless water heaters available in the market today. There are single-stage units and multi-stage units. The single-stage units are usually installed in bathrooms, since they are smaller than the multi-stage ones. But you can get the same kind of results from multi-stage units even if they are bigger in size. Single-stage units also produce less moisture, so they are ideal for places where condensation is a problem like shower rooms.

One of the biggest advantages of using an electric tankless water heater is its energy savings. Aside from paying less for energy, you can also reduce your carbon footprint. Since the water is heated on demand and only used when you’re thirsty, it results to cheaper electric bills. You can also add up to 15% more energy savings through the year if you regularly use your tankless unit as hot water source.

This kind of tankless heater saves money because it produces less heat. The electric unit runs continuously when needed. This results to lesser energy consumption. This translates to lower electricity bills and savings. In fact, some homeowners have reported saving up to 80% more from their electric tankless water heaters compared to conventional units.

Compared to the conventional type of tankless heaters, electric tankless water heaters do not cause much noise. They are very space saving because they take up very little space inside the bathroom. They do not have to be vented and they are ideal for apartments and homes with limited spaces. The gas tankless water heaters are a bit loud but it is quite manageable when installed in the right spot.

The good thing about these electric tankless water heaters is that they are very safe and reliable. Most of them are produced with modern safety devices like overload and short-circuit warning. If there is a power outage or a gas leak, an automatic shut-off system will automatically shut down the unit. You do not need to worry because most manufacturers give enough time for the problem to be resolved before the unit will need to be repaired.

The gas-fired hot water heaters also have their benefits. You can save money and energy, you do not need a gas line installed, and it is also very safe to use. However, gas-fired heater is not advisable for homeowners with a gas line in their homes because this kind of heater requires constant maintenance. A gas water heater needs to be refueled with natural gas whenever it gets low on supply.

The good thing about the 120-volt electric tankless water heaters is that they require less space. They could be installed on almost any flat surface including your deck and outdoor locations. You can also install a gas-fired heater near a shower, your garden, your patio, or beside a pool. This means that you will not have to pay more for a gas connection.

Another advantage is that you can install an electric tankless water heaters without the need for a professional installation technician. The only thing you need to do is to add an electric outlet. Although installing a gas-fired unit will require you to hire a professional technician, you still do not need to do so because you can simply install the heater yourself. Since this unit is less complicated, it will be easier for you to install and you can do it yourself rather than calling a contractor to do it for you.

The natural gas tankless water heaters usually consume three to four times more energy than the electric ones. As a result, they usually cost more. In contrast with the two different types of natural gas units, this unit consumes only one-third of the amount that natural gas units consume. This means that you will be able to save up to 70% of your energy consumption by using an electric tankless water heater. If you are concerned about your electricity consumption, you could always choose natural gas instead of natural gas since this unit only consumes half as much.