Rinkmo Electric Tankless Water Heater 18KW 240V Instant Hot On Demand Residential Electric Water Heater for Bathroom Bathtub rv Whole House Shower Sink Small

(8 customer reviews)

Price: $349.99

🚿【365Days & 24H Endless Hot Water】: No need to preheat before using instant tankless water heater. As soon as you turn on the tap, the hot water flows with your desired temperature. No waiting for preheat or standby energy loss, save your time and money.
🚿【10-fold Security Technology Systems More Safe】: This is a Safe water heater, design for whole house using especially those with babies at home. Inner water and electricity lines are designed to run separately so as to avoid rusting or mineral buildup issue that do great harm to water quality and your safe. So you can get steady stream of clean and fresh hot water for daily life.
🚿【Save Money Save Cost】: After using our Rinkmo high efficient water heater, you will find your water Heating Costs Reduce Up to 60%, due to our heater is 99.8% Energy Efficient, you can get hot water within 3s; Create heat without direct contact with metals,No mineral buildup so you don’t need to maintenance or fix it and replace the heater coils, No expensive maintenanc cost in the future.
🚿【Stable Water Temp for Whole House 】: Our smart modulating technology and formula 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 sensors and flow sensors. No sudden temp changes.
🚿【Compact Size Save Space】: Rinkmo water heater only like a small suitcase, save your space and giving more to your living area. Easy to install and operation, set temp by turning the button, press the button to switch between Fahrenheit/ Celsius.

SKU: B08JCGS3RP Categories: , Tag:
Brand Rinkmo



Rinkmo Electric Tankless Water Heater 18KW 240V



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Rinkmo Electric Tankless Water Heaters Help You

After soliciting opinions from nearly thousand netizens, we know that safety and cost effectibeness electric tankless water heaters are the most important points for consumers.

So Rinkmo has developed a new line of more efficient electric tankless water heaters within 3 years, which with improved design and state of the art technology.

It is a new generation of instant and efficient electric tankless water heaters, safe, efficient and cost effectiveness never before obtainable. Radically solve the problems.

You can installed it anywhere hot water is needed.

Rinkmo always care what consumers care about.




No Worry


No above bad things happened under Rinkmo, you can enjoy your life without this terrible things even you have hard water.

Endless Hot Water

Not worry about the hot water even you have a long shower time.

No need to preheat, 3s you can get the hot water you want, no annoying delay and cold water.

Just turn on the tap or shower.

It can run both of our showers and dishwasher/washing machine without issue, up to 3 x faucet, 2 x shower at the same time.

Well suited also good for homes in the Northern U.S. and Canada or in the southern U.S. that have large Roman-style or Jacuzzi tubs that have generally more demanding water usage needs.

Get Comfortable Experience

Rinkmo use high quality temperature sensors and smart flow sensors, it is very important for our using experience.

So you can still get stable temperature water instead of scalding hot water, when you reduce flow rate or low water pressure.

The water temperature will not fluctuates anymore when you take shower and bathe baby.

-Auto protection: when it is detected that the outlet temp reaches 167 ° F (75 ° C) ,the system immediately cuts off heating for safe.

Temperature abnormal reminder: The display will alarms if the inlet water temp <37° F, or the outlet temp >167° F

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Compact Design

Save space design, allows you install it in non-traditional spaces such as the utility room, basement, garage, attic, crawl space or even a closet.

Easy to read digital temperature display, no any complicated requirements for installation without minimal noise output.

Size: 18x14x3.7in

Weight: 11.2lb

Well sealed packaged that you can get a intact product, no any dented or damage.

Save Money Save Time

1. Compared to traditional tanks water heater:

Rinkmo instant Electric Tankless Water Heater only turn on when you need hot water, reduce the store heat loss, saving up to 50% in water heating costs, and you can get the fresh water.

2. Compared to other Electric Tankless Water Heater:

Totally solve most of safe problem and high maintenance costs, more cost-effective under our Original Water Pipe and Electricity Heating Separate tech:

304 stainless steel water pipe, healthy.

No mineral builup, no need to clean it.

No dirty water

You don’t need to ask a plumber to repairing machine multiple times.

Real savings for your future cost, time and money.

Good for Other Commercial Places

Rinkmo Electric Tankless Water Heater not only for home use, but also for many other commercial places where need instant, endless and safe hot water, such as: apartment, barbershop, hotel, beauty salon, gym center, restaurent and so on.

More Smart Design:

-High quality sheet metal shell, fireproof

-Screen shows actual outlet water temperature clearly instead of the setting temp, safer

-Machine will auto stop if no water be heated.

-Adapt to 2 voltages: 240V/208V both ok, just 1 button to set it when install

-Cleanable filter

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Fundamentally Solve Customer Problems
Original Technology-Water Pipe and Electricity Heating Separate

TURELY SAFE compared to other Traditional electric water heater or storage water heater.


18kw Electric Tankless Water Heaters need:


Cable: 2x8AWG


No mineral buildup,no the terrible things you worry about:

No-Scaling, dirty water
No-Scaling, high cleaning costs
No-Scaling, circuit board damage
No-Scaling, leakage or burnout risk
No-Replace heating coils
No-Frequently replace parts
No-Unstable water temp

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How to Find Yours




First, before order unit, you need to check below things:

Determining your average inlet water temperature is important, this allows you to determine how well your unit will perform in your desired location.


Next you will determine how many applications your unit can run simultaneously at your chosen location inlet water temperature.


Next you will determine how many applications your unit can run simultaneously at your chosen location inlet water temperature.

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Additional information


18KW, 24KW



8 reviews for Rinkmo Electric Tankless Water Heater 18KW 240V Instant Hot On Demand Residential Electric Water Heater for Bathroom Bathtub rv Whole House Shower Sink Small

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    This compact water heater the size is very small. You can hang it on the wall. Good space saver. The price is cheap. It only take around 10 second for the hot water to come out. This heater is good for small family or RV. My only concerns for this heater would be energy consuming. I will posted an update regarding the electric bill for later for a comparison. So far, this heater works really good for my home.

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    Jenny Sullivan

    Bought this water heater to replace an old tankless one. It is easy to assemble. Once turn on, we have hot water in seconds, faster that the old one. The temperature adjustment feature is awesome, and more energy efficient.

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    This water heater is small. it doesn’t take up much space, so no need to even take out the old water tank.we have 9 people living in the house. It takes our 50 gallon water tank about 40 minutes to boil water.our 50 gallon water tank is 11 years old. people said max water tank life is 12 years old.the cost of a new water tank is probably double the price of this instant water heater.so, mind as well replace the water tank with an instant water heater.Just FYI, if you don’t know how to do the electric wiring, you will need to find/hire someone to do the electric and pipe hook up. after the guy hooked everything up, instant hot water like normal.

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    I love it! It is hot enough for me to enjoy my shower. If the flame happens to go out, all you need di is turn off water for a second then turn back on and it reignites.

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    Kathy Chen

    Was super excited when this came in the mail! This water heater is tankless so it takes up much less space than my old water heater. It works amazingly as my water takes no time at all to heat up. The design also looks so nice and sleek much better in comparison to a clunky water tank. It’s also much easier to manage because it doesn’t get mineral buildup which means no need to go through the hassle of cleaning it. Not to mention it’s incredibly easy to install! I can’t recommend this enough!

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    alice wang

    I had it installed and it works perfectly. The water is more than hot. I am totally satisfied with this heater. I live in a small cabin, so taking out the 40 gal tank and replacing it with this on demand heater was a good move.

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    I am super impressed with this product. We had always had the traditional water heater and when it went out we decided to try. So glad I did. My electric bill has gone down and I have hot water when and where I want and how much I want at anytime.

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    My apartment always using the hot water tank for hot water. Until last month. We found the big leak under the tank. It will cost me couple thousands to replace the hot water tank with labor. That is way too more than I can afford. So my plumber suggested me to try the electric tankless water heater since my space is small and only 2 peoples who will be using the hot water. So after i did some research and compared on Amazon. I decided to try this unit. It has 18kw. Should be powerful enough for my use. The main cost about the unit is that required licenses plum and electrician to install the unit. Even the instructions is very clear and easy to understand. But for safety issues and warranty. I still do recommend letting the professional doing the work. Overall it will still cost less than replacing the hot water tank. After couple weeks used. This unit work great. Even after my wife took 40 minutes shower. There are still have hot water for me to do the shower. Before I always had to wait half hour for the water gets hot again. And we can adjust the temperature too. So when summer time we can lower the temperature. More energy efficient. Overall it will save the electric bill.Overall I think this unit is great. Very inexpensive and convenient for small apartment. More efficient than traditional tank water heater. But if you want it working properly. I do suggest to hire a licensed plumber and electrician.

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