20 Best electric instant water heater

An electric instant water heater is a good choice for anyone who wants instant hot water, even on a budget. Electric instant water heaters utilize a lower energy output than storage water heaters and a lower temperature than tankless heaters. These models can heat a whole house very quickly, and usually for more than its intended use, depending on the model. They are also good for small spaces. Electric instant geyser models are the best option of small geysers, simply because you get instant hot water without needing to wait for it to heat up.

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EcoSmart ECO 11 Electric Tankless Water Heater, 13KW at 240 Volts with Patented Self Modulating Technology
3,037 Reviews
EcoSmart ECO 11 Electric Tankless Water Heater, 13KW at 240 Volts with Patented Self Modulating Technology
  • Endless On-Demand Hot Water; Consistent hot water when you need it that never runs out; Continuously monitored water temperature and controlled flow rates ensure efficiency and consistent performance within 1 degree of selected temperature
  • Save Space; EcoSmart tankless electric water heaters are 90% smaller than traditional tank heaters; may be installed on wall or at point of use; Dimensions 11.5 x 8 x 3.75 inches
  • Save Energy; EcoSmart tankless electric water heaters are 99% thermal energy efficient; Only heats water when called unlike a tank heater that maintains water temperature even when not being used.
  • EcoSmart ECO 11 Sizing; 13-kilowatt tankless electric water heater ideal for providing hot water for a bathroom, small sink, office breakroom and other point-of-use or low-flow applications; provides between 1.3 and 3.1 gallons-per-minute depending on the inlet water temperature; refer to the sizing guide to select the proper solution
Rheem RTEX-24 24kW 240V Electric Tankless Water Heater, Gray
348 Reviews
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
Bosch Electric Mini-Tank Water Heater Tronic 3000 T 2.5-Gallon (ES2.5) - Eliminate Time for Hot Water - Shelf, Wall or Floor Mounted
5,860 Reviews
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
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EcoSmart ECO 27 Electric Tankless Water Heater, 27 KW at 240 Volts, 112.5 Amps with Patented Self Modulating Technology,White
3,701 Reviews
EcoSmart ECO 27 Electric Tankless Water Heater, 27 KW at 240 Volts, 112.5 Amps with Patented Self Modulating Technology,White
  • Savings of up to 50% on water heating costs. Dimensions :17H x 17W x 3.625D inches ;Pipes fittings :3/4 inch NPT
  • Digital temperature control in 1-degree increments allows control of hot water; Activation Flow: 0.3 GPM
  • Copper and stainless components designed for efficiency, durability and easy replacement.
  • Compact size saves valuable storage space, while the stylish and advanced design is pleasing to the eye and Copper and stainless components designed for efficiency, durability and easy replacement.
  • Prior to purchase & installation, please verify that this model is the right size for your hot water needs and electrical requirements. Electrical requirements: 27 kW, 240 volts, (3) 40 required breakers, 112.5 maximum power (AMP), (3) 8 required wire.Amperage Draw:113 A
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Rheem RTEX-18 18kW 240V Electric Tankless Water Heater, small, Gray
764 Reviews
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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Stiebel Eltron Tankless Water Heater – Tempra 24 Plus – Electric, On Demand Hot Water, Eco, White, 20.2
954 Reviews
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
RINKMO Electric Tankless Water Heater 18KW 240V Instant Residential Electric on Demand Water Heater for Bathroom Bathtub rv Whole House and Point-of-Use Shower Sink Small
314 Reviews
RINKMO Electric Tankless Water Heater 18KW 240V Instant Residential Electric on Demand Water Heater for Bathroom Bathtub rv Whole House and Point-of-Use Shower Sink Small
  • 💧 INSTANT ENDLESS HOT WATER: Our RINKMO 18KW tankless water heater requires 2 x 40 AMP breakers and 2 x 8 AWG wire, the Water Flow is 0.4GPM/1.5L/min. You aren't limited to the amount a storage tank heater can hold, tankless water heater technology will instantly supply the hot water your lifestyle demands.
  • 💧 MONEY & TIME SAVING EXPERT: Units are designed to be highly efficient by heating water only when it's needed, no need to preheat, giving you hot water in seconds, not minutes, saving up to 40% energy.
  • 💧 10 TIMES SAFE PROTECTIONS: A Safer water heater, designed for point-of-use especially living with babies. Inner water and electricity lines separate technology prevents from building up rust and scale inside the tank, you'll always experience fresh, clean water that's heated on demand.
  • 💧 INTELLIGENT & EFFICIENT UNIT: Our smart modulating technology and sensor 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 and flow sensors.
  • 💧 POWERFUL for WHOLE HOUSE: Small and mighty, the suitcase-sized wall units fit in many spaces, freeing up more usable living area in your home. Easy to install and operate, press the button to switch between Fahrenheit/ Celsius.
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Ecosmart POU 3.5 Point of Use Electric Tankless Water Heater, 3.5KW@120-Volt, 7” x 11” x 3”
675 Reviews
Ecosmart POU 3.5 Point of Use Electric Tankless Water Heater, [email protected], 7” x 11” x 3”
  • 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
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Ecosmart ECO 36 36kw 240V Electric Tankless Water Heater
426 Reviews
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

What Is An Electric Instant Water Heater?

A major advantage of an electric instant water heater is that it takes up less space. Most models fit in the corner of a room or garage. The unit is smaller than traditional tankless water heaters and sits higher. This means that you can place them more easily and in the corners of your home. You can also use these in apartments and tiny spaces, as they can fit into tight places where a tankless heater cannot. If you live in an older home, a tankless water heater may be a better option, as older homes were designed with underground tanks and pipes.

Another benefit of electric instant water heaters is that they do not cost much to run, making them an economical choice. Many models are priced under $200, making them affordable for almost anyone. The fact that they use less energy makes them cost efficient. It also saves you money, as you will not have to pay for the cost of heating water for an entire day when you do not use hot water. An electric heater gives you an endless supply of hot water, so you don’t need to have another source of hot water, as long as the tank is full.

The size of an electric tankless water heater also makes them more energy efficient. In general, you will save money on your monthly electric bill if you choose a larger tank. If you have never heated your own water before, you may find that the first week or so of using your electric instant water heater may take a little longer than you would have expected. This is normal, and as your tankless water heater warms up it will begin to run faster.

If you would like to have your electric tankless heater to maintain a constant temperature, you can opt for a self-modulation heater. A self-modulation heater works on two principles – one is that it takes the same amount of time to heat up water as it does to chill it, and the other is that it runs very quietly while it is heating up water. These are much quieter than traditional tankless heaters and are better for families. Some models can actually be set to run at a single temperature with a timer variable to let you manually adjust the temperature during the day.

An electric water heater that uses electricity to operate should have an outlet near where you intend to put it. If you place it in a location where it will not get power, it will be ineffective. Some models may have to be plugged into an existing outlet to work. Make sure that you read the instructions carefully and do not use an outlet that is already in use. In addition, you want to ensure that there is at least one non-flammable outlet near where you plan to put your instant hot shower.

The best use for your electric instant water heater is when it is not in use. Let the unit cool down completely before turning it on again. Wait at least ten minutes before turning it back on to ensure that any residual electricity is absorbed by the hot water before it is used. Use this time to conduct a standard inspection of the electrical components of the unit. You will most likely find that all of the connections are OK and working.

If there is one area of concern with your heater that you can help with, it is the ability of the pump to control the hot water temperature that it pumps out of the unit. Pumps that are improperly installed or improperly maintained will often prevent the pump from doing its job to regulate the water temperature. It is very important that you keep a close eye on the pump so that it does not get backed up with dirty water and cause the entire system to malfunction.