Best Ecosmart Water Heaters in 2025

4 Piece Tankless Water Heater Flush Kit. Helps maintain and extend the lifespan of your tankless water heater

Kit comes with 3.5 gallon bucket with lid, 1/6 HP Pump, and 2 Steel hoses. Just add 2-3 gallons of vinegar or your own descaling solution

Works with most all tankless water heaters such as Rinnai, Bosch, Noritz, Rheem, Takagi, Tempra, Navien, Ecosmart, Stiebel, Eccotemp, Atmor, Trutankless, Marey Power, and others.

On demand a continuous and unlimited supply of hot water

Sleek design saves space and no venting required, It also features two different temperature memory presets, making it easy to adjust for personalized needs.

Requires hard-wired 240 or 208-volt electric service, with a maximum draw of 28,800 watts at 240 volts or 21,600 watts at 208 volts

***Kit requires 2 gallons of white vinegar*** Not included. Some tankless manufacturers recommend using vinegar or another cleanser for flushing their equipment. Can also save money if you have vinegar at home already.

Helps maintain the performance and extend the life of your tankless hot water heater. Easy directions for DIY Homeowner use.

Includes 1/8 HP Utility Pump, 6 Ft Color Coded Hoses, 3.5 Gallon Bucket with EZ Open Lid & Instructions for using vinegar. Peel Off Lid is super flexible and much easier to remove than traditional paint bucket lids.

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

Saving Energy & Money- Built in insulation foam, reduces heat loss. 4-gallon point-of-use mini-tank fits under your sink to provide hot water right where you need it.

High Quality Built & Elegant Design- Camplux electric water heater has glass-lined tank for long service life and easy to maintain. Elegant streamline design cover, made your kitchen more pretty.

UL Approval Safety - Thermostat Control allows adjustment of water temperature. High Limit device provide protection while overheating.

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

【INSTANT & SUFFICIENT HOT WATER】 With real powerful 18kW smart heating system, the tankless hot water heater electric ECO180B supplies sufficient instant and endless hot water of 120℉ or higher in seconds, no waiting for preheating nor terrible temp fluctuation during shower time any more and no worry of running out of it. Perfect companion for whole house use, including shower, sink faucets, dishwasher, washing machine, etc.

【SELF MODULATION INSTANT WATER HEATER】The electric on demand tankless hot water heater ECO180B adjusts exact power input based on current flowrate and temp setting. For example, less power will be consumed by the smart water heater when you reduce water flow, thus, you get ideal temperature instead of scalding hot, which ensures comfortable experience and excellent energy efficiency. Also, optimal energy efficiency of 98% saves considerable electric charge for you.

【CONVENIENT USE】The electric tankless water heater 18kW comes with digital display & touch control panel so temp setting is easy job. Best of all, useful information on the screen helps you get full understanding of the working status of the 240v water heater tankless, you needn’t go through hard lesson of temp setting. Now turn on the faucet and let the smart instant hot water heater do the rest.

【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.

ON/OFF Dial Control with adjustable digital temperature display

Self-modulating power control

8kW Model Flow Rate: up to 1.95 GPM

【CONTINUOUS FLOW】Equipped with a 9KW high-power heating system, BIS09 is specially designed for bathing, which can automatically maintain water temperature for your constant comfort during bathing. If the hot water demand exceeds the capacity, simply set the temperature to 116°f or reduce the water flow through the water flow-regulating valve, and the hot water shower will never be interrupted. (116°f is the most comfortable temperature for bathing)

【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.

Compact and stylish with digital temperature control in increments of 1f ranging from 80f to 140f

RTEX04 and RTEX06 only show output temperature and are non thermostatically controlled

Durable, point-of-use hot water solution ideal for a full bathroom nationwide – Sink and Shower combination

3 settings: high 13 kW, medium 8.5 kW, low 4.5 kW

Saves up to 50% on water heating costs vs. a tank water heater

Item Weight: 8.5 lb

Country of Origin: United States

Brand name: Rheem

【Tips】 The instant hot water heater does not store water (Water Temperature Range: 30-55℃,Can’t change to Fahrenheit, Voltage:AC 110V;Wire Requirements:6mm² Copper wire (#9 awg wire); )Trip switch:≥63A(Otherwise it will trip).Applicable Water Pressure：0.04-1.2Mpa.The outlet water temperature depends on the inlet water temperature and water flow. The larger the water flow, the lower the temperature, the smaller the water flow, the higher the temperature.

【Instant Heating】 Instant Hot Water Heater Applied with 5.5KW heating system,24 hours ready to continuously supply instantaneous hot/warm water at preset temperature throughout your home only when needed. NO standby energy consumption. NO wait for tank to fill up. Temperature ranges from 86°F- 131°F, requiring 63A Circuit Breaker and 1/2"NPT water connections.

【Light Weight】8.8"W×8.2"H×3"D,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.

Continuous Hot Water – never run out of hot water, even with back-to-back showers

Tankless Gas Water Heaters are cost saving and energy efficient

Reduces Energy Consumption - Automatically adjusts the amount of energy required to heat the water you need

Continuous Hot Water – never run out of hot water, even with back-to-back showers

Tankless Gas Water Heaters are cost saving and energy efficient

Reduces Energy Consumption - Automatically adjusts the amount of energy required to heat the water you need

Warm to hot climates - serves up to 3-4 bathrooms | Cool to cold climates - serves up to 3 bathrooms

Requires a 240-Volt service with four 40 Amp double-pole breakers and four 8/2 AWG wires

35° F Temperature Rise – 7.3 GPM, 45° F Temperature Rise – 5.46 GPM, 55° F Temperature Rise – 4.47 GPM

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

POINT OF USE - Installs at the point of use, for hot water where you need it

PERFORMANCE UP TO 0.7 GALLONS PER MINUTE (GPM) - Enough to run 1 faucet in multiple climates (*Results are based on 72˚F inlet water temperature and 105˚F outlet water temperature)