Top 10 On Demand Electric Water Heater Whole House – Water Heaters

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1. Rheem

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Rheem RTEX-24 24kW 240V Electric Tankless Water Heater, Gray

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Rheem #ad - On/off dial control with adjustable digital temperature display. On demand, consistent and continuous hot water. Self-modulating power control. 24kw model flow rate: up to 5. 9 gpm for rtex-24. Bottom 3/4" nPT water connections.
BrandRheem #ad
ManufacturerRheem #ad
Height17.63 Inches
Length18.25 Inches
Weight17.8 Pounds
Width3.5 Inches
Part NumberRTEX-24
ModelRTEX-24

2. Stiebel Eltron

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20.2, White, Stiebel Eltron Tankless Water Heater – Tempra 24 Plus – Electric, Eco, On Demand Hot Water

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Stiebel Eltron #ad - Our 7-year leakage and 3-Year Parts Warranties are included with purchase. 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. Warranties included – stiebel eltron’s top-rated electric tankless water heaters perform with the highest standards for comfort and reliability.

Easy operation – electronic switch activates the hot water heater and it’s noise free while in use. Tempra 24 plus – this specific model is 24kw, and offers an output water temperature of 68° to 140°F. It’ll reduce flow slightly if hot water demand exceeds capacity. Continuous flow – advanced flow control patented technology invented by Stiebel Eltron, automatically maintains water temperature for constant comfort.

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. Has a digital temperature display and preset temperature and memory buttons, while the interior solid copper heating system does all the power work. Check our guides below to compare features of our various Trend and Plus models, requires a min recommended electric service of 150 A, 240V, each available in different kW levels. Hot showers will never be interrupted again.
BrandStiebel Eltron #ad
ManufacturerStiebel Eltron #ad
Height14.5 Inches
Length4.63 Inches
Weight1 Pounds
Width16.63 Inches
Part Number239222
Model239222

3. thermomate

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Thermomate On Demand Instant Endless Hot Water Heater, 114A GRAY, Digital Temperature Display for Residential Whole House Shower, Tankless Water Heater Electric 27kW 240 Volt

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thermomate #ad - Flow Rate 5. 27gpm @35°f rise. Wall mounted compact size with no water tank, saving floor space and fitting into tight spaces. Self-modulating power - self-modulating technology regulating the amount of energy required to heat water only when you need it with 99. 8% efficient, convenient for any spaces, saving up to 60% on water heating cost comparing to traditional tank water heater.

Heating element separated from water tube significantly reducing scale, corrosion and mineral buildup on the element, achieving better performance and low maintenance. 2-year limite warranty and 24/7 customer support services. Stable water temperature - auto adjusting energy consumption basing on income water temperature and flow, ensuring maximum efficiency, continuous stable temperature and optimal power usage. Instant unlimited hot water - require 3 set x double-pole 40amp breakers to achieve 240v for this on demand tankless electric water heater, eliminating wait time, providing hot water in 3 seconds when you need it and as long as you need, never run out of hot water again and No More cold shower.

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. Digital temperature display allowing adjustment in 1° increment from 80°F to 140°F.
Brandthermomate #ad
Manufacturerthermomate #ad
Height3.12 Inches
Length17.12 Inches
Width13.12 Inches
Part NumberET270
ModelET270

4. RINKMO

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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

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RINKMO #ad - 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. 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 04gpm/1.

5l/min. Money & time saving expert: units are designed to be highly efficient by heating water only when it's needed, not minutes, no need to preheat, giving you hot water in seconds, saving up to 40% energy. Easy to install and operate, press the button to switch between Fahrenheit/ Celsius. 10 times safe protections: a safer water heater, designed for point-of-use especially living with babies. 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. 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.
BrandRINKMO #ad
ManufacturerRINKMO #ad
Height17 Inches
Length13.12 Inches
Width3.12 Inches
Part NumberEI18
ModelEI18
Warranty2 Years

5. Focket

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Whole House, Shower, for Bathroom, Sink SmallWith shower, RV, Bathtub, with HD LCD Display, Electric Tankless Water Heater, 4500W 110V Electric Instant Hot Water Heater On Demand Water Heater

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Focket #ad - Lcd displaythe high-definition lcd display allows you to keep track of the working status of the water heater and is easy to operate. Water heater materialthe 4500w tankless water heater uses tempered glass surface material, waterproof and scratch resistant, fashionable texture, when cleaning‑wipe it out, safer to use, simple and convenient.

Adjustable controlsay goodbye to hot and cold, intelligent constant temperature technology, to meet the household's multiple water needs at the same time, control the water temperature difference within the appropriate temperature. Thus you still get ideal temperature instead of scalding hot water, water heater adopts fast heating system function, uniform heating and long life, no need to wait for a long time, instant hot water output, which means comfortable experience. Safe and durablestainless steel cup heating body, water leakage, explosion‑proof.

Meanwhile, one machine with multiple functions, with a high power of 4500w and a temperature of 55℃. Great for kitchen, bar, community and hair salon. 100% warrantywe promises every customer a 100% shopping satisfaction, feel free to reach us if you have any questions about your purchase. We will give you a professional and detailed reply within 24 hours. Click to buy now! And, hospital, school, the tankless water heater comes with digital display & touch control panel so temp setting is easy job.
BrandFocket #ad
ManufacturerFockety #ad
Height0 Inches
Length0 Inches
Weight4.55 Pounds
Width0 Inches
Part NumberFocketyr2t58gqun1-12

6. Fockety

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Bathtub, Electric Instant Hot Water Heater On Demand Water Heater, for Bathroom, Shower US, 3-Dimensional Surround Design, with Overheating Protection, RV, Whole House, Tankless Water Heater

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Fockety #ad - 3-dimensional surround designthe electric water heater has 3-dimensional surround design, which improves heating stability. No need to store water, suitable for home kitchen, energy saving and environmental protection, no need to preheat, bathroom and toilet.

Thus you still get ideal temperature instead of scalding hot water, which means comfortable experience. Instant & sufficient hot waterthe instant hot water heater is fast heating in 3 seconds, high thermal efficiency. Meanwhile, the water flow sensor can be sensitive to changes in water pressure, 304 stainless steel waterway extends up to 1. 8 meters, and it can work as low as 004mpa. Safety protectionthe mini water heater is equipped with leakage protection, water electricity isolation, dry heat protection, with auto power off inactive state, overheat auto power off.

Sturdy and durablethe water heater has exquisite brass inlet and outlet, sturdy and durable to make sure that the water source is not polluted again. 100% warrantywe promises every customer a 100% shopping satisfaction, feel free to reach us if you have any questions about your purchase. We will give you a professional and detailed reply within 24 hours. Click to buy now! .
BrandFockety #ad
ManufacturerFockety #ad
Height0 Inches
Length0 Inches
Weight3.28 Pounds
Width0 Inches
Part NumberFockety37bgv2gpwq-12
ModelFockety37bgv2gpwq-12

7. Rheem

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Rheem RTEX-18 18kW 240V Electric Tankless Water Heater, small, Gray

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Rheem #ad - Simple installation – bottom 3/4 inch NPT water connections. Flow rate- up to 4. 4 gpm. Most advanced self-modulation, adjust power to meet hot water demand. Durable copper immersion two heating elements, field Serviceable. External digital thermostatic control with LED display +/1 degree accuracy. Threaded for easy replacement, simple installation, digital temperature display.
BrandRheem #ad
ManufacturerRheem #ad
Height14.5 Inches
Length18.25 Inches
Weight14.8 Pounds
Width3.5 Inches
Part NumberRTEX-18
ModelRTEX-18

8. EcoSmart

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112.5 Amps with Patented Self Modulating Technology, White, 27 KW at 240 Volts, Ecosmart ECO Electric Tankless Water Heater

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EcoSmart #ad - Recommended electrical Panel: 200 Amps. Required breaker quantity: Three 40 Amp Double Pole. 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.

Warranty and certifications; limited Lifetime Warranty on electronics, exchanger and element; UL-499 certified; ETL Listed. 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 17 x 17 x 3. 75 inches . Save up to 12 cubic feet of storage space. Digital temperature control in 1-degree increments gives users complete control of hot water.

Save up to 50% in water heating costs according to the Department of Energy. 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. Never run out of hot water with an ECOSMART tankless water heater. Ecosmart eco 27 sizing; 27-kilowatt tankless electric water heater ideal for providing hot water for whole home applications; provides between 2. 7 and 6.
BrandEcoSmart #ad
ManufacturerEcosmart #ad
Height17 Inches
Length3.63 Inches
Weight11 Pounds
Width17 Inches
Part NumberECO27
ModelECO 27
WarrantyLifetime Warranty on electronics, exchanger and element. Warranty only covers cost of heater; does not cover labor or any incidental damages.

9. EcoSmart

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18 KW at 240 Volts with Patented Self Modulating Technology, EcoSmart ECO 18 Electric Tankless Water Heater

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EcoSmart #ad - Digital temperature control in 1-degree increments gives users complete control of hot water. Flow rate @ 35 f Rise gallons/min: 3.

Activation flow: 03 gpm. The product is highly durable. Save up to 60% on your water heating costs with the most advanced, self modulating technology available. Save up to 12 cubic feet of storage space. The product is easy to use. Manufactured in China. Never run out of hot water with an ECOSMART tankless water heater. 75 a. Amperage amps: 75. Lifetime warranty for residential use. The product works and is compatible with 2 X 40 AMP DP breakers and 2 X 8 AWG wire. 51 gal US/min.
BrandEcoSmart #ad
ManufacturerEcosmart #ad
Height17 Inches
Length3.63 Inches
Weight14 Pounds
Width14 Inches
Part NumberECO 18
ModelECO 18
WarrantyLifetime Warranty on electronics, exchanger and element. Warranty only covers cost of heater; does not cover labor or any incidental damages.

10. EcoSmart

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13KW at 240 Volts with Patented Self Modulating Technology, EcoSmart ECO 11 Electric Tankless Water Heater

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EcoSmart #ad - 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. 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. 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.

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.
BrandEcoSmart #ad
ManufacturerEcosmart #ad
Height11.5 Inches
Length3.75 Inches
Weight6.5 Pounds
Width8 Inches
Part NumberECO 11
ModelECO 11
WarrantyLifetime Warranty on electronics, exchanger and element. Warranty only covers cost of heater; does not cover labor or any incidental damages.