Search  for anything...

Ecosmart ECO 36 36kw 240V Electric Tankless Water Heater, White

  • Based on 700 reviews
Condition: Used - Like New
Checking for product changes
$603.33 Why this price?

Buy Now, Pay Later


As low as / mo
  • – Up to 36-month term if approved
  • – No impact on credit
  • – Instant approval decision
  • – Secure and straightforward checkout

Ready to go? Add this product to your cart and select a plan during checkout. Payment plans are offered through our trusted finance partners Klarna, PayTomorrow, Affirm, Afterpay, Apple Pay, and PayPal. No-credit-needed leasing options through Acima may also be available at checkout.

Learn more about financing & leasing here.

Selected Option

Free shipping on this product

This item is eligible for return within 30 days of receipt

To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.

To initiate a return, please visit our Returns Center.

View our full returns policy here.


Availability: 11 left in stock
Fulfilled by Amazon

Arrives Friday, Apr 25
Order within 3 hours and 50 minutes
Available payment plans shown during checkout

Pattern Name: Heater


Features

  • Sleek and compact design with digital output temperature display
  • ECOSMART tankless water heaters are 99.8-percent energy efficient
  • Manufactured in United States
  • Pipe Fittings:3/4 inch NPT
  • Required Breaker:4 x 40 A
  • 150 A

Description

Eco Smart ECO 36 Electric Tankless Water Heater, 36 KW at 240 Volts with Patented Self Modulating Technology Why Eco Smart? If you have a need for a high amount of hot water then the ECO 36 is the right choice. The ECO 36 is the largest electric tankless water heater available with our patented self-modulating technology. This smart technology tankless water heater is ideal for the northern United States, where incoming water temperatures can reach as low as 37 degrees F. The ECO 36 is capable of heating nearly 3.5 gallons per minute at this low temperature. To put that into perspective, it can handle up to two showers running at the same time and never run out of hot water. For homes in the southern United States, the ECO 36 is perfect for large Roman-style and Jacuzzi tubs or high demand of hot water between multiple applications. It can handle up to 6 gallons per minute, which means you can run four showers and a sink simultaneously and never run out of hot water. A digital temperature control allows you to set your temperature in increments of 1 degree, so you can set the temperature to how you like it. The ECO 36 is the most powerful model from our full line of tankless water heaters, with the capacity to handle a large single-family home.Take a look at our full line of tankless water heaters below to see what's perfect for you. THIS MODEL REQUIRES 150 AMPS DEDICATED!. Required Wire: 4 x 8 AWG From the Manufacturer Ecosmart ECO 36 Electric Tankless Water Heater, 36 KW at 240 Volts with Patented Self Modulating Technology Why EcoSmart? If you have a need for a high amount of hot water then the ECO 36 is the right choice. The ECO 36 is the largest electric tankless water heater available with our patented self modulating technology. This smart technology tankless water heater is ideal for the northern United States, where incoming water temperatures can reach as low as 37 degrees F. The ECO 36 is capable of heating nearly 3.5 gallons per minute at this low temperature. To put that into perspective, it can handle up to two showers running at the same time and never run out of hot water. For homes in the southern United States, the ECO 36 is perfect for large Roman-style and Jacuzzi tubs or high demand of hot water between multiple applications. It can handle up to 6 gallons per minute, which means you can run four showers and a sink simultaneously and never run out of hot water. A digital temperature control allows you to set your temperature in increments of 1 degree, so you can set the temperature to how you like it. The ECO 36 is the most powerful model from our full line of tankless water heaters, with the capacity to handle a large single-family home. Take a look at our full line of tankless water heaters below to see whats perfect for you. THIS MODEL REQUIRES 150 AMPS DEDICATED!

Brand: EcoSmart


Product Dimensions: 21"W x 17"H


Color: White


Wattage: 36000 watts


Voltage: 240 Volts


Brand: ‎EcoSmart


Product Dimensions: ‎21"W x 17"H


Color: ‎White


Wattage: ‎36000 watts


Voltage: ‎240 Volts


Maximum Flow Rate: ‎6 Gallons Per Minute


Heat Output: ‎36 Kilowatts


Efficiency: ‎99.8%


Style: ‎ECO 36


Mounting Type: ‎Wall


Is Electric: ‎Yes


Manufacturer: ‎Ecosmart


UPC: ‎785577595127 854920002350


Global Trade Identification Number: ‎50


Part Number: ‎ECO 36


Item Weight: ‎18.35 pounds


Item model number: ‎ECO 36


Is Discontinued By Manufacturer: ‎No


Pattern: ‎Heater


Amperage Capacity: ‎150 Amps


Item Package Quantity: ‎1


Usage: ‎Residential


Included Components: ‎Rough Plumbing, Water Heaters, water-heaters


Batteries Included?: ‎No


Batteries Required?: ‎No


Warranty Description: ‎Limited Lifetime Warranty


Date First Available: July 21, 2014


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Friday, Apr 25

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.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • PayTomorrow Financing
  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Top Amazon Reviews


  • 4 years and still going strong
Pattern Name: Heater
This water heater is awesome nearly 4 years and going strong. When we bought our fixer upper, this was put in to replace an 80 Gallon traditional HW heater. I wanted the efficiency of not storing water. There are 3 adults in the house, so typical water usage. I ran the 4 sets of high voltage wires to the circuit panel with required 4 double throw 240v circuits, to power it so you have to have a fair amount of room in your service panel to make this work. I love the way it is easy to adjust HW down to 80 degrees. We have a hose hook up for convenience right at the unit in the garage. This makes it easy to do water changes on my fish tank as well are on a well with great water and I don’t have to treat it. Also nice to have warm water for washing cars and we never run out of hot water. Would definitely recommend a buy. ... show more
Reviewed in the United States on March 19, 2025 by South Sound Sound

  • Limited lifetime warranty, great customer service.
Pattern Name: Heater
This thing is super high quality! I was expecting a cross between an anvil and a hot water heater for the price. I was impressed the second I took it out of the box. I installed mine myself. I had some plumbing refits since I was going from a tank to tankless. The wiring was pretty strait forward, but these things do pull a ton of amps. I installed mine and all the lights in the house flickered as the heater cores cycled. I had more than enough service to the house. There is a ton of stuff on the web about tankless waterheater doing this, not just EcoSmart. Somewhere outside my house in the power lines there is a loose neutral wire connector. You can forget getting the power company to chase the line and fix it. So now I am freaking out. I have plumbed and wired for this and now I am going to have to send it back and change everything for a tanked heater.....or so I thought. I called EcoSmart and talked to Juan. I explained to him what was happening. He knew what it was doing and he explained to me that they can help. All I had to do was open the control box and move a jumper that slowed down the cycle. I took me longer to open the box than it did to fix it. Now hot water all the time. I have turned on 5 sinks and 2 showers (with the outside temp of 34) just to see what the max I could use at one time. I could not tell a temperature difference with all in use. Last, these things have a limited lifetime warranty. I would recommend any EcoSmart product because of the customer service, the quality, ease of installation, and the lifetime warranty. ... show more
Reviewed in the United States on April 2, 2018 by William H.

  • Make sure to register it within 30 days
Pattern Name: Heater
The media could not be loaded. I bought the unit in May 2023 for an addition I was planning to build onto my house. I didn't open the box or read the manual to learn that there is no warranty unless you register the product within 30 days of purchase until it was too late. As soon as the unit was powered up it had problems with the motherboard. It would not turn on when the water started flowing. I had two master electricians and a master plumber troubleshoot the unit before calling customer service. Both electricians told me the power was good. They could get the unit to turn on by applying pressure to certain places on the control board or wires but it would become unresponsive after. Eventually it quit turning on completely. I reported the problem to customer service and they sent a replacement motherboard free of charge even though I had not registered the warranty. With the new motherboard installed the unit works but will only power on 2 of the 4 heating elements. If the water flow exceeds 1.3gpm the unit returns an error code E5, which usually means the water flow is too high for the unit, but the unit should operate with as much as 6gpm at my incoming water temp of 67°F. I contacted customer support again and they cannot help me. They suggested purchasing a new flow sensor, which doesn't make sense because it is displaying the correct flow amount on the unit; the unit just thinks that 1.4+gpm is too much and will not kick on the other heating elements. All heating elements, thermistors, and the fuse have been checked by a master electrician according to the company's troubleshooting guide. They will not replace the unit because I didn't register the warranty in time. So the unit powers one shower but no more, and there doesn't seem to be a way to fix it. Lesson learned. Make sure to register any appliance purchase within 30 days and be prepared for the spam emails to surge a bit after they sell your information to data farms. ... show more
Reviewed in the United States on December 19, 2023 by BeardedWonder

Can't find a product?

Find it on Amazon first, then paste the link below.