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
  • 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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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
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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
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
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
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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
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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
Tankless Water Heater Electric 5.5kw 240V, ECOTOUCH Point-of-Use Hot Water Heater Digital Display,Electric Instant Hot Water Heater with Self-modulating,Overheating Protection,White
  • 【INSTANT & SUFFICIENT HOT WATER】Applied with 5.5KW heating system, the electric water heater supplies instant, consistent and endless hot water of 116℉or higher temp shortly, no waiting for preheat nor terrible temp up & down, perfect companion for sinks. Time to get rid of those "lukewarm" toys.
  • 【SMART SELF ADJUSTMENT】The hot water heater adjusts power input based on flow rate and temp setting in real time. For example, less power will be applied by the system when waterflow reduced, thus you still get ideal temperature instead of scalding hot water, which means comfortable experience. Optimal energy efficiency of 98% saves considerable electric charge.
  • 【CONVENIENT USE】The tankless water heater comes with digital display & touch control panel so temp setting is easy job. Now turn on the tap and let the smart unit do the rest, you needn’t go through hard lesson about temp setting by a mixer tap without any hint. The Black model comes with Remote control, useful for installation under sink.
  • 【SAFE and DURABLE】Applied with multiple protection devices, every piece goes through strict tests to ensure 100% safe. Inner water and electricity lines are designed to run separately so as to avoid leakage or harm of scale build up. Approval by ETL and qualifies for UL, you can expect outstanding performance for years to come.
  • 【POINT of USE】The sleek tankless water heater is compact as an oatmeal box, making it possible to install anywhere close to outlet and avoid energy waste. It can be mounted horizontally, vertically, obliquely, ideal for kitchen, bar, school, hospital, community and hair salon. Please verify it is the right size for you: [email protected]; dimensions 11" x 7.5" x 2.35"; pipes fittings :1/2" NPT.
Rinkmo Electric Tankless Water Heater 18KW 240V Instant Hot On Demand Residential Electric Water Heater for Bathroom Bathtub rv Whole House Shower Sink Small
  • 🚿【TIPS】Please notice that the 18KW tankless water heater requires 2 x 40 AMP breakers and 2 x 8 AWG wire, the Min. Water Flow is 0.4GPM/1.5L/min. The 24KW tankless water heater requires 3 x 40 AMP breakers and 3 x 8 AWG wire, and the Min. Water Flow is 0.66GPM/2.5L/min.
  • 🚿【Save Money Save Cost】No need to preheat before using instant tankless water heater. After using our Rinkmo high efficient water heater, you will find your water Heating Costs Reduce Up to 60%, due to our heater is 99.8% Energy Efficient, you can get hot water within 3s; Create heat without direct contact with metals,No mineral buildup so you don't need to maintenance or fix it and replace the heater coils, No expensive maintenanc cost in the future.
  • 🚿【Stable Water Temp for Whole House 】Our smart modulating technology and formula to calculate the difference between the desired temp and current temp, adjusts power input based on flow rate and temp setting in real time by our temp sensors and flow sensors. No sudden temp changes.
  • 🚿【Stable Water Temp for Whole House】Our smart modulating technology and formula to calculate the difference between the desired temp and current temp, adjusts power input based on flow rate and temp setting in real time by our temp sensors and flow sensors. No sudden temp changes.
  • 🚿【Compact Size Save Space】Rinkmo water heater only like a small suitcase, save your space and giving more to your living area. Easy to install and operation, set temp by turning the button, press the button to switch between Fahrenheit/ Celsius.
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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
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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Titan Electric Tankless Water Heater
  • Tankless Water Heater
  • 220 V
  • 54 Max Amps
Bosch Thermotechnology 7736505871, 9.5kW, Bosch US9-2R Tronic 3000 Electric Tankless Water Heater, 9.5 kW, 6.6" x 12.8" x 2.9", White
  • ELECTRIC TANKLESS WATER HEATER: 9.5 kW under-sink tankless water heater designed to provide an endless supply of instantaneous hot water to one or more sinks
  • FLEXIBLE INSTALLATION: Can be installed in a 360 degree orientation so you can position the unit in tight under counter spaces for a flexible, worry-free setup. Due to the amperage requirement this item will be hard wired.
  • EFFICIENT DESIGN: Ultra compact and lightweight design with 98% efficiency and no stand-by heat loss plus does not require a temperature or pressure relief valve
  • DURABLE PLASTIC CONSTRUCTION: Roundagon Bosch DNA design provides a modern look that blends in seamlessly with existing decor when installed in a visible location and is built of durable plastic housing for long-lasting use
  • IDEAL SIZE: Measures 6.6" x 12.8" x 2.9", making it the perfect size for light commercial applications such as shopping malls, airports, stadiums and offices.
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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
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
Instant Electric Tankless Hot Water Heater 110V 3800W Mini Shower Kitchen Bath for Home Kitchen Use
  • 【Instant Hot Water】:3000W rated power 50Hz frequency can provide you hot water range from 35-45℃ , get instant endless hot water easily , As soon as you turn on the tap,you just need to relax and wait for the hot water to come out
  • 【Lightweight Safety Design】: Mini size Approx. 13.5 x 6 x 16.5cm/ 5.31 x 2.36 x 6.59" and lightweight design for your home use. It can bring instant hot water for you at home when washing food or vegetable in kitchen
  • 【Energy Saving】:Compact and light weight structure with extraordinary energy saving technology. This electric water heater are designed with advanced combustion technology to decrease gas consumption and burning noise. Save more when using our tankless water heater
  • 【Safety Protection】: Leakage protection, IPX4 waterproof, Dry heating protection, Water-electricity isolation, Auto power-off at inactive state, Over-temperature automatic power-off
  • 【Worry Free Purchase】: US STOCK, delivery in 3-5 working day. We provide high quality products and great after sales customer service,customers could reach us for any problems and we will reply in 24 hours to solve your problem
Camplux Tankless Water Heater Electric with LED Display 120V Instant Water Heaters Under Sink 3.5kw TE04
  • Smart&Considered Design: Small water heater designed with smart touch control & LED display, mini size, perfect for under sink installation. The minimum water flow for activation just need 0.4 GPM (Only for one sink)
  • Multi-angled Mounting: The compact size instant electric water heater requires a connection of 1* 40A circuit breaker & 10 AWG wire. Install close to outlet for energy saving. Can be mounted Multi-angled, ideal for kitchen, wet bars, school, hospital, hair salon and boats. Please make sure it is the right size for you: 3.5kW at 120V, product dimensions 7.8" x 6.3" x 3.9", water pipes fitting: 1/2" NPT male
  • Reliable&Durble: The 3.5kW tankless water heater comes with 5 protections. NFS approved, offer lead-free water. ETL safety certified, leakage and overheat protection device to ensure your safety. Stainless steel and copper component for high efficiency and durability
  • Consistent Hot Water -On demand water heater only heats the water when you need it and no waiting for preheat.The temperature rise of 1.0 GPM is 55°F. Easy to get hot water between 85°F - 131°F in seconds. Enjoy instant and endless hot water
  • Rotatable LED Display: 120V tankless water heater features an upgrade rotatable digital temperature display and touch control panel, show you the easy reading output water temperature at real-time and setting ideal temperature just by finger
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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
Tankless Electric Hot Water Heater 220/240V under sink Kitchen Household, Small Compact Instant No Standby Losses,Hot Water Output of 1.8 GPM,2 PCs 16” Long 1/2”FIP Copper Head Hose(White 7KW) (White)
  • 【ENDLESS WATER HEATER】3 seconds to get hot water without preheating. Instant consistent and endless hot water of the maximum temperature reach to 131 ℉. Tankless electric water heater on demand suits for sinks and bathroom( meet bathing needs except extremely cold winter such as 28℉).
  • 【SMART INVERTER FOR ENERGY SAVING】The hot water heater built-in smart chip to scientifically calculate the minimum required power based on the water flow and temperature thus costing less energy and money. Save up to 70%. The water flow rate and temp is stable under chip's control.
  • 【SAFE DURABLE & LONGEVITY】Multiple safety protection functions protect you from the risk of scald, leakage or other injury. Premium tempered glass shell is corrosion resistant, high-grade and easy to wipe. This mini hot water heater is ideal for kitchen, bathroom, bar, school, hospital, community and hair salon.
  • 【EASY TO USE】 The electric tankless water heater comes with digital display & touch control panel for visual setting. Shower head, water valve, pipes and other accessories are complete for quick installation without additional expenses or preparing time of accessories.
  • 【COMPACT & POINT-OF-USE】It is surprised that this electric hot water heater can be installed 360°(no matter mounted horizontally, vertically & obliquely). Dimensions: 7.4″L x2.5″W x11.0″H; 5.13lbs; 1/2″NPT NPT. 7.0 kW, 220-240 volts. One-year warranty and 24H customer service support, feel free to contact us.
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

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.