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Airthereal Electric Tankless Water Heater 18kW, 240Volts - Endless On-Demand Hot Water - Self Modulates to Save Energy Use - Small Enough to Install Anywhere - for 2 Showers, Evening Tide series

  • Based on 578 reviews
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Availability: In Stock.
Fulfilled by Amazon

Arrives Thursday, May 23
Order within 16 hours and 41 minutes
Available payment plans shown during checkout

Model: 18kW


Features

  • 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 dont 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 energy compared to a typical tank water heater.
  • Important Note: In order to install 18kW Electric Tankless Water Heater it requires 240 Voltage, 2 x 40 AMP Circuit Breaker Size and a set of 2 x (8AWG/2) wires. 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.

Brand: AIRTHEREAL


Product Dimensions: 12.25"W x 17.25"H


Special Feature: Airthereal


Color: Black


Wattage: 18000 watts


Brand: ‎AIRTHEREAL


Product Dimensions: ‎12.25"W x 17.25"H


Special Feature: ‎Airthereal


Color: ‎Black


Wattage: ‎18000 watts


Voltage: ‎240 Volts


Style: ‎Indoor Installation


Mounting Type: ‎Wall


Manufacturer: ‎Airthereal


Part Number: ‎EVT-18K


Item Weight: ‎19.16 pounds


Country of Origin: ‎China


Item model number: ‎18kW


Size: ‎18 kW-For Use with 2 Showers


Installation Method: ‎Wall-Mounted


Special Features: ‎Airthereal


Included Components: ‎Electric Tankless Water Heater 18kW


Batteries Included?: ‎No


Batteries Required?: ‎No


Date First Available: September 13, 2021


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Thursday, May 23

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Top Amazon Reviews


  • I will do business with them again in the future!!!
Model: 18kW
Here is my 100% “gods honest” experience and i really do hope this helps people!! Sorry it’s a little long!… I decided to give the 18k evening tide a try in my home! After reading the owners manual it was simple enough to understand how to install it! (I must mention i am a handyman by trade) it took a few hours to read, pull wires, and run some plumbing. I was moving my hot water heater location from the basement to the utility room on the main floor, because otherwise it would not take nearly as long since its basically a plug and play unit!! I did have an issue… & looking back, i know my original unit was faulty out of the box… i had ordered it on cyber monday so honestly i am wondering if it was dropped in the mail… it worked for 2 weeks and crapped out… this is my first experience with tankless & no one i know has used them either… so i didn't know something was wrong initially… when it died i was sad to learn that their customer service line is only open 12-4 est & panicked a little lol…. But i found out you can email them any time and they will typically get back to you outside of that timeframe!!! They are a smaller company & so I totally understand!! Per their request I sent them a couple short videos along with some other information and i was issued a replacement!! Exactly 1 week from making initial contact with the company i had my replacement and swapped the units out. Which took abt 30 mins including cutting breakers off & on in the basement, I honestly could’ve probably coached my 10 year old through doing it!! Immediately i knew the replacement was a good unit and that the original never was!! (It goes to standby mode when the hot water is not running which makes total since!!! If you see an EF code when the water isn’t running it does not mean energy efficient lolol) Anyways, to wrap all of this all up, i am very pleased with this product and company!! I do a lot of home remodeling and honestly i will start putting these in houses that need new water heaters!! Im a single mom of 3 girls & we tend to go through some hot water… lolol this is seriously a game changer in our life!!! Everyone can shower back to back before bed and no one has to get stuck with a potentially cold one lololol its so compact and honestly not bad to look at!! *Just wanted to update* We are 3 months in with the new unit and i am beyond pleased!!! I can run a bath while the shower is running and theres never a shortage of hot water!! The only *flaw* i have found is if you only run the hot water momentarily (im talking seconds) then the unit beeps because there is no water flow to cool the jets which just fired up. Which is not actually a flaw, just how things work! So if you turn on the hot water let it run for at least 30 seconds lol i am in love with this purchase!! ... show more
Reviewed in the United States on January 19, 2022 by Emily

  • Best customer service, Airthereal stands by their products
Model: 14kW
Our current tank-less water heater needed to be replaced. We could not find the model that we had. We decided to give this water heater a try. The unit did not work as expected and finally quit one day. We gave the company another chance, so we bought another unit. We bought it directly from the Airthereal website. During that process, I was trying to get a replacement for the first unit. I thought Amazon would take care of it, but it turns out I needed to work with Airthereal. I sent an email to their customer support, explained the situation, they sent me a replacement unit free of charge. Laura was amazing in her communications. The only time I asked to speak with her supervisor was to tell them what a great job Laura did. We have replaced the original unit and works as expected. We are pleased with the results of the new unit, and overwhelmingly thrilled with the company and their ownership in our situation. We are looking at other products they sell that we are in the market to purchase. Airthereal has a customer for life. ... show more
Reviewed in the United States on March 28, 2023 by Amazon Customer

  • I have problems with mine
Model: 18kW
I purchased 18kw unit 7 months ago. It was working fine for about a month. Then started beeping and displaying E5. It got progressively worst. It would start beeping and displaying E5 randomly even when water is not running like in the middle of the night. Now it beeps and displays E5 and doesn't heat water. I contacted the manufacturer and was told to PDF invoice and take photos of the voltage measured with voltmeter. I did that. I was told that another high powered appliance is interfering and causing the beeping and displaying error code 5. Yes we have a heat pump. We also have a dryer and oven that are on 240 voltage or high powered, we also have solar system. So far I have no resolution from the manufacturer. All and all, if you have a high powered appliance in your home, chances are it is not a good fit for you. The manufacturer responded by sending a new unit. Just installed it today. Seems to be working fine, heating water and not beeping error codes. Hope it works. ... show more
Reviewed in the United States on April 17, 2024 by Hristo Lutzkanov

  • Faucet must be all the way up
Model: 18kW
My house is older. Install was easy if you know plumbing. However, the faucet must be turned all the way to the very far edge of hot any tap to the cold side and it is no hot water.
Reviewed in the United States on April 14, 2024 by Jason Biondolillo

  • Crazy deal at $229
Model: 18kW
Bought this on sale to replace a dead Bosch Powerstar (expensive new, no current support). Very easy to install, performs much better than the 16kw Bosch. No issue with a hot shower (its in a guest cabin, so just 2 sinks, one shower). Time will tell as to durability. As others have noted, mount it somewhere accessible (closet for me) as if power is interrupted it goes into standby mode when power comes back. You just have to touch the on button, but if it were in a crawlspace that wouldn't be helpful. Unit is briefcase sized, so should be easy to fit anywhere. ... show more
Reviewed in the United States on February 2, 2024 by Gregory F Lepore

  • Great product, good value shipped on time
Model: 18kW
It does support 2 showers running at the same time, works good
Reviewed in the United States on April 4, 2024 by Sophie K.

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