28 Best Electric Tankless Water Heater For Whole House in 2024 (Rankings & Top Reviews)

[Instant Unlimited Hot Water] - REQUIRE 3 SET x Double-pole 40AMP Breakers to Achieve 240V for this On demand tankless electric water heater, providing hot water in 3 seconds when you need it and as long as you need, eliminating wait time, never run out of hot water again and No More cold shower. Flow Rate 5.27GPM @35°F Rise

[Self-modulating Power] - Self-modulating technology regulating the amount of energy required to heat water only when you need it with 99.8% efficient, saving up to 60% on water heating cost comparing to traditional tank water heater. Wall mounted compact size with no water tank, convenient for any spaces, saving floor space and fitting into tight spaces.

[Stable Water Temperature] - Auto adjusting energy consumption basing on income water temperature and flow, ensuring maximum efficiency, continuous stable temperature and optimal power usage. Digital temperature display allowing adjustment in 1° increment from 80°F to 140°F. Heating element separated from water tube significantly reducing scale, corrosion and mineral buildup on the element, achieving better performance and low maintenance.

[Easy Installation & Safety Protection] - ETL certified with overheating protection, auto stop heating when detecting no water, quality workmanship for leakage protection

NOTE - Make sure this water heater is the correct size for your hot water need: 27kW at 240V draw max 114Amp; Required breaker 3 x Double-POLE 40AMP; Wire gauge 3 x 8AWG; Unit size 17.12" x 13.12" x 3.12"; Water connection 3/4" NPT. 2-year limite warranty and 24/7 customer support services.

☼ Endless Hot Water: Imagine you are the last one in your family to take a shower before heading out for the day. You turn on the faucet and the water is freezing cold. Too bad you don’t have an Airthereal Electric Tankless Water to provide endless hot water on demand with no preheating, temperature fluctuations, or running out of hot water in the tank.

☼ Save Space: That water heater in the basement or utility closet takes up a ton of space. This wall-mounted water heater uses 90% less space than a traditional hot water heater with a tank.

☼ Save Energy: Water is only heated when you need it, not stored in a hot water tank. The self-modulating temperature technology only uses energy to heat up water while you are using it to save up to 50% on water heating costs compared to a typical tank water heater.

☼ Important Note: In order to install 9kW Electric Tankless Water Heater it would requires 240 Voltage, 40 AMP Circuit Breaker Size. Please check to confirm that your breaker panel meet these specifications.

☼ Safe To Use: With high temp protection, dry heating protection, and electrical leakage protection you can rest easily knowing you have safe, on-demand hot water to use on your schedule. The electric and fluid systems are completely separated to prevent electric leakage and water pipe corrosion.

UNLIMITED HOT WATER ON DEMAND - Tankless electric water heater provides instant, continuous water flow

WHOLE HOME SOLUTION - Easily provides enough hot water for a house or apartment

PERFORMANCE UP TO 5.3 GALLONS PER MINUTE (GPM) - Enough to run 4 faucets and 2 showers simultaneously in warm climates (*Results are based on 72˚F inlet water temperature and 105˚F outlet water temperature)

INTUITIVE INTERFACE AND SPACE SAVING DESIGN - Adjust temperature and settings with easy-use touch screen on a compact unit that takes up significantly less space than a tank style water heater

ENERGY EFFICIENT - Conserves energy and water by only using energy when hot water is in use, saving you money

INSTANT HOT WATER HEATER - Applied with 5500W heating system, the electric tankless water heater supplies instant hot water, 3 seconds to get hot water without preheating. Instant consistent and endless hot water of the maximum temperature reach to 55℃/131℉. It is perfect companion for sinks, bringing you perfect experience of comfort and relaxing.

REMOTE CONTROL OR TOUCH SCREEN - Ultra slim and smooth appearance design, beautiful and elegant. The temperature can be adjusted by remote control and touch control, which is more convenient to use, can avoid wet hands to adjust, and is safer; constant temperature water outlet three-level power adjustment, bid farewell to cold and hot

SAVE SPACE AND ENERGY - Compact design, our tankless Hot Water Heater is only the size of a small suitcase, and the wall-mount design frees up valuable floor space within your home. And 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.

EASY TO INSTALL - The home water heater has a mini body, easy to install in the bathroom, kitchen, and under the sink.Standard 1/2 interface(inflow or outflow), can be directly connected to household conventional hose connectors.because the power of water heater is high, the rated current is about 30 amp. The maximum load of the general home plug socket only provides 16amp （3000W）Can't load the power consumption of water heater, so it is not equipped with a plug.It is necessary to use the control line access to the connector that is greater than or equal to 30 amp contacts as the main gate to provide sufficient power and ensure safety

SAFE TO USE - With high temp protection, dry heating protection, and electrical leakage protection you can rest easily knowing you have safe, on-demand hot water to use on your schedule. The electric and fluid systems are completely separated to prevent electric leakage and water pipe corrosion.

CONTINOUS FLOW – Hot showers will never be interrupted again. Enjoy continuous, on-demand hot water with an unlimited supply, when you want it without wasting any energy when not needed

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

SILENT OPERATION – One electronic switch will activate the hot water heater and it’s noise free while in use. Digital temperature display is easy to read, while the interior solid copper heating system does all the power work

TEMPRA 24 TREND – 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

[Two-Stage Effective Filtration] The whole house water filter has 1st-Stage premium 5-micron polypropylene sediment filter (FP15B) captures dirt, sand, silt, dust, rust, and scale particles, using high quality coconut shell carbon and highly compact fabrication tech, 2nd-stage CTO filter(FC15B) knocks out cloudiness as well as bad tastes and odors, removes over 90% of chlorine, and is highly effective on VOCs like pesticides, herbicides, and industrial solvents.

[Superb Filtration Capacity] 10"x4. 5" replaceable whole house water filters can provide up to a full year of clean water(up to 50, 000 gallons) for a family of four. 1-inch inlet and outlet ports allow fast water flow with less pressure loss. Fine PP sediment filter and premium quality CTO filter not only bring clean and fresh water to every faucet in your house, but also help prolong the lives of your water-using appliances and protect plumbing from sediment and scale buildup.

[Easy Installation and Filter Change] The system comes pre-assembled onto the mounting bracket for a streamlined, DIY installation. Filter wrench included to make routine filter changes easy and quick. A pressure release valve allows for the release of built-up pressure when changing filters. Refer to our manual and/or YouTube videos to Install this point-of-entry (POE) filtration system at the main water supply to get clean and healthy water for the entire family.

[Retain Valuable Minerals] Unlike an RO system, this system will NOT reduce Total Dissolved Solids (TDS), and instead keeps healthy minerals in your water. If you are interested in a filter that removes TDS, consider our iSpring Reverse Osmosis (RO) systems.

[Peace-of Mind Customer Service] Backed by a 30-day money-back guarantee, 1-year warranty, and extended manufacturer warranty upon warranty registration at iSpring. Lifetime CS and tech support from Atlanta, GA USA. We stand behind our products. If you encounter any problems with any of our products, please reach out to us immediately. We are happy to help!

UNLIMITED HOT WATER ON DEMAND - Tankless electric water heater provides instant, continuous water flow

WHOLE HOME SOLUTION - Easily provides enough hot water for a house or apartment

PERFORMANCE UP TO 3.8 GALLONS PER MINUTE (GPM) - Enough to run 1 faucet and 2 showers simultaneously in warm climates (*Results are based on 72˚F inlet water temperature and 105˚F outlet water temperature)

INTUITIVE INTERFACE AND SPACE SAVING DESIGN - Adjust temperature and settings with easy-use touch screen on a compact unit that takes up significantly less space than a tank style water heater

ENERGY EFFICIENT - Conserves energy and water by only using energy when hot water is in use, saving you money

【Electric Tankless Water Heater】The V7B-180 is compact design for point of use anywhere, in the meanwhile it is able to provide luxury & endless hot water up to 2.8GPM with its powerful 18kW heating system. It is great idea to install this tankless water heater electric a few ft away from shower tub or washing machine, to get sufficient and endless hot water of higher than 120℉ in seconds.

【Smart Tankless Water Heater】Tankless water heater electric V7B-180 wastes no energy for preheating like tank water heater, instead, this instant water heater adjusts power input based on real time flow rate and temp setting, thus, no fluctuation out of it even when flowrate changes, which commits comfortable experience, safety and optimal energy efficiency of 99.8%, saving up to 50% on water heating cost.

【Safe& Durable Instant Water Heater】This electric water heater is newly designed with multiple protection devices, such as leakage protection, dry heating protection, high temp protection & auto stop. Every piece of V7B-180 goes through strict tests to ensure 100% safety and it is listed by ETL, suitable for residential, restaurant, school, hospital, office and other public facility.

【Unique Electric Water Heater】The electric tankless water heater V7B-180 comes with a specially designed heating chamber, which runs water line and electricity line separated for the benefits of no leakage, no inner corrosion and minimized scale deposit, so you can expect outstanding performance in years to come with nearly zero maintenance.

【Point of Use Water Heater】This electric tankless water heater is compact design for space saving & point of use, avoids energy & water waste. Comes with standard 3/4" NPT pipe fittings and it requires 240V supply via two pieces of “40A Double Pole Circuit Breaker” and two sets of “8AWG/2 wires with Grounding”, please check and confirm that your circuit breaker panel meet these needs.

On-demand, continuous and unlimited supply of hot water

Sleek design saves space and no venting required

Electronic switch activated for virtually silent operation. Phase- single 60 Hz. Voltage- 208 V. Wattage- 27 kW

Copper sheathed heating element housed in copper cylinder

7 Years leakage and 3 years parts complete warranty