---
product_id: 7293244
title: "EcoSmart ECO 8 Tankless Water Heater, Electric, 8-kW - Quantity 1, 12 x 8 x 4"
brand: "ecosmart"
price: "¥79918"
currency: JPY
in_stock: true
reviews_count: 8
category: "Eco Smart"
url: https://www.desertcart.jp/products/7293244-ecosmart-eco-8-tankless-water-heater-electric-8-kw-quantity
store_origin: JP
region: Japan
---

# 8-kW electric power 2 GPM flow rate 1°F digital temp control EcoSmart ECO 8 Tankless Water Heater, Electric, 8-kW - Quantity 1, 12 x 8 x 4

**Brand:** ecosmart
**Price:** ¥79918
**Availability:** ✅ In Stock

## Summary

> ⚡ Instant Hot Water, Zero Wait—Upgrade Your Flow Game!

## Quick Answers

- **What is this?** EcoSmart ECO 8 Tankless Water Heater, Electric, 8-kW - Quantity 1, 12 x 8 x 4 by ecosmart
- **How much does it cost?** ¥79918 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/7293244-ecosmart-eco-8-tankless-water-heater-electric-8-kw-quantity)

## Best For

- ecosmart enthusiasts

## Why This Product

- Trusted ecosmart brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Compact & Space-Smart:** Sleek 8"W x 11.5"H design frees up valuable space—ditch the bulky tank and upgrade your home.
- • **Precision Heat Control:** Set your perfect temperature with 1°F increments for ultimate comfort and efficiency.
- • **Durable & User-Friendly:** Built to last with easy digital controls and maintenance-friendly features for hassle-free ownership.
- • **Energy-Efficient Powerhouse:** 8-kW electric heating delivers instant hot water on demand, cutting energy waste and bills.
- • **Versatile Point-of-Use Solution:** Ideal for sinks, showers, or radiant floor heating—customize your hot water needs effortlessly.

## Overview

The EcoSmart ECO 8 is a compact, electric tankless water heater delivering up to 2 gallons per minute with precise digital temperature control in 1°F increments. Designed for climates with incoming water temperatures of 67°F and above, it offers energy-efficient, on-demand hot water ideal for point-of-use applications like sinks, showers, or radiant floor heating. Its space-saving design and durable build make it a smart upgrade for modern homes seeking convenience and utility savings.

## Description

From the Manufacturer This Smart Technology electric tankless water heater is configured for climates where incoming water temperature is 67 Degree F and above. This model is well suited for heating up to 2-Gallon per minute, which is the equivalent of one shower head (with a 1.5 gpm flow) and one sink with a low inlet water temperature of 67 Degree F. Digital Temperature Control allows you to set your temperature in increments of 1 Degree. This model can also be used in colder climates as a Point of Use for a sink or other low flow application. Prior to purchase and installation please verify this model is the rights size for your hot water needs and electrical requirements.

Review: Just installed, seems to work as described. - I (late 40's, mechanically-minded woman) just installed this unit in our home. Installation not too complicated, this replaced a 50-gallon tank water heater. Servicing two sinks and two appliances, (kitchen, 1/2 bath and laundry room) I sized this item to the available electrical supply, as I did not wish to incur the extra expense of additional wire and another circuit breaker. Existing wiring consisted of one double-pole 40-amp breaker and sufficient gauge conduit. Since this unit is supplying a dishwasher, washing machine, kitchen sink and bathroom sink, none of which would be likely opened at the same time, I figured this unit should be more than sufficient. So far, so good. Did not experience the leakage problems with the compression fittings others have noted, I think these fittings simply require a gentle hand. I did have to make adjustments from 3/4" supply lines down to the 1/2" necessary for this unit; the downsized pipe acts as a self-restrictor of sorts, slowing down the water flow to allow ample heating of the water before it exits the heater. I also installed an inline scale inhibitor filter, Aqua-Pur AP430SS, so reconfiguring the plumbing was necessary, as well as the addition of two 1/4-turn ball valves. (Highly recommend replacing the crappy spigot-handled gate valves that are typically installed with original tank water heaters, these things rarely actually completely shut off the water supply to the heater, especially in an emergency or during maintenance.) This was also my first attempt at sweating copper pipe and fittings, and after a few tries, achieved success with leak-free connections. Hubby seemed impressed that I did not burn down the house... although I don't think he really was confident in allowing me to play with the blow torch. A word of caution, as others have mentioned, the manufacturer stipulates installation by a professional plumber, (name and license number required on the warranty registration card) or apparently that 'lifetime warranty' is voided. That is disappointing, but if installation will cost more than the appliance, (as is common) sometimes you gotta do what you must. Did spend additional funds for the sediment filter, copper pipe and brass and copper fittings, and flexible SS supply lines, (highly recommend Falcon Industries' hoses, although they're made in China,) but estimate I saved a minimum $300.00 on installation, probably more. Be careful with the compression fittings, enclose your electrical connections inside a lidded junction or outlet box, and purge the line for a few minutes to ensure all air has been removed prior to turning on the heater, and you should be good to go. I do like the simple knob control, which allows precise selection of output temperature, and the fact that the unit can be turned on or off without having to mess with the breaker panel. This is handy when changing out the sediment filter, or for other non-electrical maintenance. It will be interesting to note the difference in the next electric bill or two; this is the second tankless electric water heater we've installed in the house. (Purchased previous unit on desertcart, see my earlier reviews for that unit.) After the first one about eight years ago, the following month's electric bill was about $30.00 cheaper. Eagerly anticipating the next one to see if similar utility savings will be realized. Also have plans to utilize the newly-found storage space in the corner of our garage that was formally occupied by the old water tank.
Review: Using as radient floor heat source. long term results - over 15,000 hours run time - I built a 16'x20' wood floor shop and installed under floor heating in 2016. Bought this unit as a low cost proof of concept heat source because it met my power requirements and flow rate. I installed a meter to monitor usage and it has over 15,000 hours of flawless operation time on it even while pumping water/antifreeze mixture. I installed a thermal sensor to cut it off when the return temp reaches 110F to let the hot water warm the floor and save some electricity. When the temp drops it turns back on and doesn't need to need to run at full power. I keep wanting to put a current monitor to see what actual watts it draws when not at a full "burn." Our winters here lately have been in the sub 0 range and with this unit my shop will keep at a cozy 65F. I do need to do some more insulation under the floor to make it more efficient but that has nothing to do with the water heater. When this unit dies, I have no qualms about buying another one

## Features

- The product is highly durable
- The product is easy to use
- Manufactured in China

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Brand | EcoSmart |
| Capacity | 2 Gallons |
| Color | White |
| Power Source | Corded Electric |
| Product Dimensions | 8"W x 11.5"H |
| Special Feature | LED Display |

## Product Details

- **Brand:** EcoSmart
- **Capacity:** 2 Gallons
- **Power Source:** Corded Electric
- **Product Dimensions:** 8"W x 11.5"H
- **Special Feature:** LED Display

## Images

![EcoSmart ECO 8 Tankless Water Heater, Electric, 8-kW - Quantity 1, 12 x 8 x 4 - Image 1](https://m.media-amazon.com/images/I/71tciSltcFL.jpg)

## Available Options

This product comes in different **Style** options.

## Questions & Answers

**Q: Could this be used to slowly heat a small above ground pool?  Just wanting it warmer.**
A: Funny how all of the answers here are probably not, I doubt it or I wouldn't.  Don't answer the question if you don't actually know. 

I use the eco 8kw coupled to a standard water heater recirculation pump and it works well for 2000 gallon pool.  I would say though 8 kw is minimum for this much water.  I can maintain 80°F in ambient temp of    60° (nightly low) to high of 72°.  I run it about 2-4 hours a day depending. Costs about $3 - $6 to run per day.  Hope this is useful information.

**Q: will freezing weather damage it**
A: As long as the water is able to run though the pipes it won't but the water won't be very hot. Only heats the water to a certain degree above original temp. Check the specs on the web site for more detail.

**Q: To replace a 40 gallon water tank heater with 40 amp fuse, is this a feabile diy project?**
A: The EcoSmart 8 isn’t capable of replacing a 40 gallon water heater. The 40 gallon heater is designed to supply hot water to every faucet in the house. The EcoSmart 8 is a point-of-use water heater designed to supply heated water to only one faucet, and usually only a bathroom faucet.

**Q: is it 50 or 60 hrtz**
A: Ours is 60 hrtz

## Customer Reviews

### ⭐⭐⭐⭐⭐ Just installed, seems to work as described.
*by M***H on September 11, 2013*

I (late 40's, mechanically-minded woman) just installed this unit in our home. Installation not too complicated, this replaced a 50-gallon tank water heater. Servicing two sinks and two appliances, (kitchen, 1/2 bath and laundry room) I sized this item to the available electrical supply, as I did not wish to incur the extra expense of additional wire and another circuit breaker. Existing wiring consisted of one double-pole 40-amp breaker and sufficient gauge conduit. Since this unit is supplying a dishwasher, washing machine, kitchen sink and bathroom sink, none of which would be likely opened at the same time, I figured this unit should be more than sufficient. So far, so good. Did not experience the leakage problems with the compression fittings others have noted, I think these fittings simply require a gentle hand. I did have to make adjustments from 3/4" supply lines down to the 1/2" necessary for this unit; the downsized pipe acts as a self-restrictor of sorts, slowing down the water flow to allow ample heating of the water before it exits the heater. I also installed an inline scale inhibitor filter, Aqua-Pur AP430SS, so reconfiguring the plumbing was necessary, as well as the addition of two 1/4-turn ball valves. (Highly recommend replacing the crappy spigot-handled gate valves that are typically installed with original tank water heaters, these things rarely actually completely shut off the water supply to the heater, especially in an emergency or during maintenance.) This was also my first attempt at sweating copper pipe and fittings, and after a few tries, achieved success with leak-free connections. Hubby seemed impressed that I did not burn down the house... although I don't think he really was confident in allowing me to play with the blow torch. A word of caution, as others have mentioned, the manufacturer stipulates installation by a professional plumber, (name and license number required on the warranty registration card) or apparently that 'lifetime warranty' is voided. That is disappointing, but if installation will cost more than the appliance, (as is common) sometimes you gotta do what you must. Did spend additional funds for the sediment filter, copper pipe and brass and copper fittings, and flexible SS supply lines, (highly recommend Falcon Industries' hoses, although they're made in China,) but estimate I saved a minimum $300.00 on installation, probably more. Be careful with the compression fittings, enclose your electrical connections inside a lidded junction or outlet box, and purge the line for a few minutes to ensure all air has been removed prior to turning on the heater, and you should be good to go. I do like the simple knob control, which allows precise selection of output temperature, and the fact that the unit can be turned on or off without having to mess with the breaker panel. This is handy when changing out the sediment filter, or for other non-electrical maintenance. It will be interesting to note the difference in the next electric bill or two; this is the second tankless electric water heater we've installed in the house. (Purchased previous unit on Amazon, see my earlier reviews for that unit.) After the first one about eight years ago, the following month's electric bill was about $30.00 cheaper. Eagerly anticipating the next one to see if similar utility savings will be realized. Also have plans to utilize the newly-found storage space in the corner of our garage that was formally occupied by the old water tank.

### ⭐⭐⭐⭐⭐ Using as radient floor heat source. long term results - over 15,000 hours run time
*by D***L on November 22, 2024*

I built a 16'x20' wood floor shop and installed under floor heating in 2016. Bought this unit as a low cost proof of concept heat source because it met my power requirements and flow rate. I installed a meter to monitor usage and it has over 15,000 hours of flawless operation time on it even while pumping water/antifreeze mixture. I installed a thermal sensor to cut it off when the return temp reaches 110F to let the hot water warm the floor and save some electricity. When the temp drops it turns back on and doesn't need to need to run at full power. I keep wanting to put a current monitor to see what actual watts it draws when not at a full "burn." Our winters here lately have been in the sub 0 range and with this unit my shop will keep at a cozy 65F. I do need to do some more insulation under the floor to make it more efficient but that has nothing to do with the water heater. When this unit dies, I have no qualms about buying another one

### ⭐⭐⭐⭐⭐ So far, it's the best thing since sliced bread!
*by H***B on October 4, 2015*

So far, it's been a great heater! I have an old house, and the electric company only provides 75Amps to my house. With my old heater (11kW), the lights would flicker, as it would chop and suck the line dry (especially when combined with the 15Amps AC working at the same time). The old heater (11kW), would heat the water full power for a fraction of a second, and the remaining time use no power at all. This caused power throttling; led lights and ac capacitor blew quickly. Also, in summer the water was burning hot; no way to control the heat. That's when I knew I needed another heater. This new heater does not flicker the lights. I think it uses a more continuous stream of energy. No chopping frequency, no sucking dry the power line at 10x per second; just one smooth functioning. It also has a temp gauge, and at 100 degrees F, it provides sufficient warm water (slightly warmer than 100F), to take a shower, or wash your hands. 105F gives pretty hot water, only suited for dishes. It's noiseless, turns off immediately when the tap is turned off; and my next electric bill will tell me how efficient it really is! It works great for Florida temps so far; feeding one tap, and one energy saving shower head at the same time. Winter is coming up, and I'll write an update on my review, how it will warm up the water then.

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-03-18*