October 14, 2025
10 Best Electric Tankless Water Heaters of 2025
Last Updated - October 14, 2025
|
Up to 36% off
1
Our Rankings
Rheem
Clicked 397 times in the last week
Rheem RTEX-24 24kW 240V Electric Tankless Water Heater, Gray
View Deal on:
View Deal
Why We Love It
- ELECTRICAL REQUIREMENTS: 3 x 40 AMP Double Pole Breakers Required. 200 AMP Household service recommended. Ensure your home can accomodate the power supply and that enough space is available in your breaker panel for this unit.
- PROVEN PERFORMANCE: Continuous hot water when you need it for the whole home (review performance guide image to confirm this water heater will provide the hot water needed based on geographic location). Ground water temperature impacts temperature rise and gallons per minute.
- EASILY ADJUSTABLE: ON/OFF Dial Control with adjustable digital temperature display allows for adjustments in 1-degree increments from 80-140 degrees F.
- EFFICIENT: Tankless electric water heaters save space, energy, money, and require no venting.
2
Our Rankings
Rheem
Rheem 18kW 240V Tankless Electric Water Heater, Gray
14% OffFree Shipping
View Deal on:
View Deal
Main Highlights
- 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
3
Our Rankings
WINTEMP
Electric Tankless Water Heater WINTEMP 27kW 240V, Whole House Hot Water Supply, On Demand Instant Endless Water Heater, with LED Temperature Display, WiFi Control, Up to 6.3 GPM, ETL Certified
View Deal on:
View Deal
Main Highlights
- Important Note: Ensure this tankless water heater meets your installation requirements. The WN27 model is rated at 27KW (240V) with a maximum amperage of 113A. It requires 3 x 40 Amp double-pole (DP) breakers and 3 x 8/2 AWG wiring with ground, with a recommended 250A household power supply. The unit dimensions are 11.1 (W) x 19.1 (H) x 4 (D), the water connection is 3/4" NPT
- Stable Water Temperature: Automatically adjusts energy consumption based on incoming water temperature and flow rate to ensure maximum efficiency, continuous stable temperature, and optimal power usage. Its maximum hot water output is 6.5 gallons per minute. It is perfect for residential shower use, eliminating the need to wait for preheating. Theres no longer any concern about running out of hot water in the tank, and you wont experience temperature fluctuations during your shower
- Energy Saving: The self-regulating technology adjusts power input based on real-time flow and temperature settings. When the water flow decreases, the system reduces power usage, and when not in use, it consumes no energy, achieving up to 99% energy savings. Compared to traditional tank water heaters, it can save up to 60% on electricity costs and is suitable for 2-4 usage points in the home
- Space Saving: The WN27 features a wall-mounted compact design, occupying 90% less space compared to traditional tank water heaters. It is suitable for tight areas and can be easily installed anywhere. It provides an endless supply of hot water in a short time without the need to wait for preheating. Equipped with remote WiFi control, you can adjust the temperature without being near the water heater
- Safe Usage: Safety is always WINTEMPs top priority. The product features multiple safety protections, including leakage protection, overheat protection, and dry-fire protection, and is ETL certified to fully ensure your safety, allowing you to enjoy hot water anytime, anywhere with peace of mind. We also provide a 2-year return and exchange warranty along with long-term professional technical support to give you worry-free use
4
Our Rankings
Rheem
Rheem 240V Heating Chamber RTEX-13 Residential Tankless Water Heater, GRAY
View Deal on:
View Deal
Main Highlights
- 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
- 54 A
5
Our Rankings
Orbek
14kW Tankless Water Heater Electric, ORBEK 240 Volt On Demand Instant Hot Water Heater, with LED Digital Display, ETL Certified, Up to 3.38 GPM for 2-3 Point of Use
View Deal on:
View Deal
Main Highlights
- Note: Things to know before buying, Our Orbek tankless water heater electric 14kw requires a 240V/60AMP two-pole breaker, 1 set of 6 AWG wires and 1/2" NPT water connections
- Instant Hot Water Supply: Orbek electric tankless water heater 240v can provides up to 3.38 GPM of on demand endless hot water and ensure comfortable hot water for 2-3 points of use simultaneously
- High Energy Efficiency: This on demand hot water heater electric utilizes water-electricity separation to minimize scale and corrosion. It provides endless hot water in just 3 seconds with an impressive efficiency, potentially reducing electricity costs by up to 60% compared to traditional tank-style heaters
- Comprehensve Security Protection: The tankless hot water heater is ETL certified and packed with advanced safety features, including leakage protection, over-temperature protection, dry-heating protection and lighting resistance etc. Each product undergoes rigorous testing before leaving the factory to ensure its safety and normal operation
- Stable Temperature Control: The built-in chip adjusts heating power 20,000 times per second, keeping water temperature stable within 1°F for a comfortable shower experience
- LED Digital Display: Our tankless electric water heater features a high-definition screen with soft lighting for easy temperature adjustments between 86°F and 140°F. It also displays real-time temperature changes
- Easy Install: With a compact size of 14.2"H x 9.5"L x 3.1"W, our electric hot water heater saves over 50% of space compared to traditional tank water heaters, fitting easily into most corners of your home. We have also made structural improvements to the product to make installation easier
- After-Sale Service: We provide long-term return & exchange services along with professional technical consulting support
See Today's Deals Prices6
Our Rankings
Rheem
Rheem 11kW 240V Tankless Electric Water Heater
View Deal on:
View Deal
Main Highlights
- 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
7
Our Rankings
EcoSmart
EcoSmart ECO 11 Electric Tankless Water Heater, 13KW at 240 Volts with Patented Self Modulating Technology
36% OffFree Shipping
View Deal on:
View Deal
Main Highlights
- 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.Amperage Draw : 54 A.Special Features: Energy Efficient
- 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
8
Our Rankings
SIVUATEK
Electric Tankless Water Heater SIVUATEK 14kW, 240V - On-Demand Hot Water for Whole House - ETL Certified, Self Modulating - Compact Design for Easy Installation - for 2 Point of Use Hot Water
View Deal on:
View Deal
Main Highlights
- Electric Tankless Water HeaterThe V7B-140B is compact design for point of use, in the meanwhile it is able to provide sufficient and luxury endless hot water with its powerful 14kW heating system. It is great idea to install this kind of tankless water heater electric a few ft away from the shower or washing machine, to get instant and sufficient hot water of 110 in seconds.
- Smart Electric Water HeaterThe electric instant water heater V7B-140B adjusts power input based on flow rate and temp setting real time, thus, you get stable temperature out of it even when flowrate changes, which commits comfortable hot water, safety and optimal energy efficiency of 98%, saving considerable electric charge.
- CONVENIENT USEDiscover the ultimate convenience with the V7B-140Ba 14kW electric tankless water heater. Featuring a user-friendly digital display and touch control panel, setting your desired temperature is a breeze. The intuitive screen provides clear, real-time updates on the working status of this 240V heater, eliminating the need for complicated adjustments or lengthy learning curves. Simply turn on the faucet and let the smart, instant hot water heater deliver reliable, on-demand hot water with ease. Enjoy modern comfort and efficiency at your fingertips.
- Safe& Durable Water HeaterThe on demand electric water heater is newly updated and applied with multiple protection devices, such as leakage protection, over heating protection and auto stop. Every piece of V7B-140B goes through strict tests and it is listed by ETL and qualifies for UL. Totally suitable for household, school, hospital, office, bar and other public facility.
- Point of Use Water Heater ElectricThe sleek electric tankless water heater V7B-140B is compact as a shoe box, making it possible to install anywhere point of use to avoid energy and water waste. It comes with standard plumbing connections 1/2" NPT for easy installation with basic DIY skills
9
Our Rankings
ECOTINYMACH
ECOTINYMACH 110V Tankless Water Heater Electric, 3000W Compact Water Heater Under Sink, Conveniently Convertible Between Fahrenheit and Celsius
View Deal on:
View Deal
Main Highlights
- Compact Design: ECOTINYMACH's tankless water heater is designed with a compact footprint, offering an efficient solution for heating water without consuming unnecessary space.
- Convertible Temperature Scale: Unique feature of our heater allows you to switch between Fahrenheit and Celsius temperature scales conveniently, enabling you to monitor the water temperature in a scale that suits you best.
- Easy Installation: Designed with simplicity in mind, our tankless water heater can be installed quickly and easily, saving you time and effort.
- Electric and Energy Efficient: Being electric and tankless, this water heater from ECOTINYMACH is not only efficient but also environmentally friendly, helping you save on your energy bills and reduce your carbon footprint.
- Installation instructions: Circuit breaker 32AMP, thread size: 1/2 "NPT, wire requires 2.5mm ² (13AWG),
10
Our Rankings
xwdzswgs
Tankless Water Heater Electric 110V, 3000W Instant Electric Water Heater, Under Sink Water Heater with Digital Display, On Demand Hot Water heater Electric for Kitchen Bathroom Washin
View Deal on:
View Deal
Main Highlights
- ELECTRIC TANKLESS WATER HEATER - This tankless electric water heater is made of high-quality ABS material, with LED display. With 3000W power, the mini water heater can raise the water by 82° F(0.3GPM) -131° F(0.5GPM) in seconds, providing tankless instant, continuous hot water without waiting for preheating, meeting daily hot water needs. The on demand water heater can set Fahrenheit or Celsius degrees by holding a power button for 6 seconds.
- COMPACT AND EFFICIENT DESIGN - The electric water heater tankless adopts an ultra-thin and smooth appearance design, which is beautiful and elegant. The point of use water heater can meet your outlet temperature requirement. The Larger the water flow, the lower the outlet temperature; The smaller the water flow, the higher the outlet temperature. Not Suitable for Shower(Shower normally requires at least 1.8 GPM). Under sink water heater 110v plug in.
- SAFETY INTELLIGENCE RELIABLE - This under sink hot water heater has multiple protection functions. Water and electricity isolation, IPX4 waterproof, leakage protection, dry boil protection, and automatic power off under overheating and inactivity. Prevent leakage and water pipe corrosion. The thermal efficiency of instant hot water heater is as high as 98%, allowing you to enjoy hot water at any time and save energy.
- EASY TO INSTALL AND APPLICATION - Our instant hot water heater under sink compact design, it is very suitable for every corner of your home. This 110 volt water heater comes with premade fixing screw holes, an English manual, and 1/2 inch NPT standard interface. This small water heater is ideal for spaces such as kitchens, apartments, bathrooms, RVs, and camping. TIP: Install vertically to avoid malfunction of the heating elements (E2).
- IMPORTANCE FOR INSTALLATION - The 110v water heater is vertical installation only, no horizontal installation is allowed, to avoid malfunction of the heating elements (E2). The electric tankless water heaters tighten the pipe connectors with Teflon tape to prevent a short circuit (E2). This tankless hot water heater is recommended to be connected with wires with a cross-sectional area of 2.5 square millimeters, and connected to trip switches of over 32a for use.
- OUTSTANDING CUSTOMER SERVICE - 30-day money-back guarantee for any reason. 24-month warranty for quality-related issues. We provide up to 8 free accessory replacements for your tankless hot water heater electric. This 110v tankless water heater electric can be used for an unlimited time. If you have any questions about our small electric water heater, please make sure to tell us first, and we will provide satisfactory solutions. Thanks for choosing our best 110v tankless water heater.
