---
product_id: 7293225
title: "Ecosmart POU 3.5 Point of Use Electric Tankless Water Heater, 3.5KW@120-Volt, 6 x 11 x 3 Inch"
brand: "ecosmart"
price: "€ 432.32"
currency: EUR
in_stock: true
reviews_count: 8
category: "Eco Smart"
url: https://www.desertcart.sk/products/7293225-ecosmart-pou-3-5-point-of-use-electric-tankless-water
store_origin: SK
region: Slovakia
---

# 3.5 kW power output Compact 6x11x3 inch size Requires 30 amp breaker & 10 AWG wire Ecosmart POU 3.5 Point of Use Electric Tankless Water Heater, 3.5KW@120-Volt, 6 x 11 x 3 Inch

**Brand:** ecosmart
**Price:** € 432.32
**Availability:** ✅ In Stock

## Summary

> 🔥 Compact power, endless comfort—heat your space smartly!

## Quick Answers

- **What is this?** Ecosmart POU 3.5 Point of Use Electric Tankless Water Heater, 3.5KW@120-Volt, 6 x 11 x 3 Inch by ecosmart
- **How much does it cost?** € 432.32 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sk](https://www.desertcart.sk/products/7293225-ecosmart-pou-3-5-point-of-use-electric-tankless-water)

## 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

- • **Energy-Efficient Operation:** Auto on/off activation saves energy by heating water only when needed—cut your utility bills and carbon footprint.
- • **Instant Hot Water, Zero Wait:** Tankless design delivers hot water on demand at 0.5 GPM—no more cold water waste or waiting.
- • **Precision Temperature Control:** Max temperature rise up to 47.8°F at 0.5 GPM ensures consistent warmth tailored to your climate.
- • **Professional-Grade Electrical Specs:** Designed for safe, reliable use with a 30 amp breaker and 10 AWG wiring—built for savvy homeowners and pros alike.
- • **Space-Savvy Under-Sink Installation:** Slim 6x11x3 inch profile fits discreetly under any sink, perfect for modern minimalist spaces.

## Overview

The EcoSmart POU 3.5 is a compact, electric tankless water heater delivering 3.5 kW of power at 120 volts. Designed specifically for point-of-use applications like under-sink installations, it provides instant hot water at a flow rate of 0.5 gallons per minute. Its energy-saving auto on/off feature and precise temperature control make it ideal for small sinks in homes, offices, or recreational vehicles, requiring a 30 amp breaker and 10 AWG wiring for safe operation.

## Description

Product Description Ecosmart POU 3.5 Point of Use Electric Tankless Water Heater, 3.5KW@120-Volt, 6 x 11 x 3 Inch From the Manufacturer This electric tankless water heater is a true Point of Use Model because it is specifically designed for under the sink, single applications with a maximum flow rate of 0.5-Gallon per minute (gpm) and includes a 0.5 gpm sink aerator. Its compact size allows for under the sink installations. The Point of Use models are ideal for: Wet Bars, Strip Malls, Doctor's Office, Boats, Recreational Vehicles (RVs), Bathroom Sinks. Prior to purchase and installation please verify this model is the rights size for your hot water needs and electrical requirements.

Review: It solved my problem at a second kitchen sink perfectly ... - It solved my problem at a second kitchen sink perfectly. Had an initial kink in that it did not work and marked E1 on the display which I could not find its meaning anywhere. Was finally able to contact the manufacturer who sent me a heat sensor to replace the problem. When I opened the casing I discovered that the sensor had not been plugged in. It has been working well since.
Review: Almost Warn not hot - Pro: Small and tidy , turns on when you turn on the water and then turns off when you close the water so pretty energy saving. Con: Its not really hot, although the temp monitor shows 90s yet you get maybe mid 70s, also water pressure gets reduced a bit and you can't turn on the cold water to get pressure since the temp is not that hot.

## Features

- Can provide hot water for one sink at 0.5 GPM in warmer climates
- Requires 1 x 30 amp breaker and 10 AWG wire
- For one sink at 0.5 GPM in colder climates the POU 6 is recommended
- Amperage Draw 29 amp. kW - 3.5 kW
- Connection Fittings 1/2" NPT
- Max temperature rise @ .5 GMP is 47.8°F Max temperature rise @ 1GPM is 23.9°F Max temperature rise @ 1.5 GPM is 15.9°F

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Brand | EcoSmart |
| Capacity | 0.5 Gallons |
| Color | White |
| Power Source | Electricity |
| Product Dimensions | 11"W x 6"H |
| Wattage | 3500 watts |

## Product Details

- **Brand:** EcoSmart
- **Capacity:** 0.5 Gallons
- **Color:** White
- **Power Source:** Electricity
- **Product Dimensions:** 11"W x 6"H

## Images

![Ecosmart POU 3.5 Point of Use Electric Tankless Water Heater, 3.5KW@120-Volt, 6 x 11 x 3 Inch - Image 1](https://m.media-amazon.com/images/I/51KCYkAZCTL.jpg)

## Questions & Answers

**Q: are any of these tankless water heaters plug in??**
A: Hello. According to the NEC and building code, electric tankless water heaters 15 amps or above do not include a cord with plug. They must be hard wired to a junction box or breaker box.
Feel free to ask us any other questions. GadgetsGo is one of the first Authorized Ecosmart Dealers, since 2009.

Kind Regards,
John M.
GadgetsGo

**Q: 60 degree water going in what degree will be at the tap**
A: Hello James. Great question. This unit heats water by 24°F at a flow rate of 1.0 GPM (and a proportionately lower temperature rise with a higher flow rate, and higher temp. rise with lower flow rate). All tankless water heaters operate on the same principle.

Therefore, you should add 24°F to your incoming water temperature of 60°F. The answer is 84°F.

This heater requires one 00 amp double pole breaker. 

For a complete explanation of how to choose a tankless water heater, check out our blog post at blog.gadgetsgo.com/how-to-buy-an-electric-tankless-water-heater

GadgetsGo is one of the first Authorized Ecosmart Dealers, since 2009.

Kind Regards,
John M.
GadgetsGo

**Q: Can the flow rate be adjusted up from 0.5gpm to say 1gpm or 1.5gpm (understood that the output water will be corresponding less hotter)? thanks in adv**
A: No.  This is a simple self- regulating unit. If you want more flow, and more hot water, go to the next size up that this company makes. I put this unit in my parents kitchen, where it doesn't get as hot and cannot cause burns. I have the larger unit in my kitchen. It can get very hot before it balances out.

**Q: Would this provide a decent shower in an RV?**
A: Hello. No, the POU 3.5 is only appropriate for hand-washing sinks. This unit heats water by 24°F at a flow rate of 1.0 GPM (and a proportionately lower temperature rise with a higher flow rate, and higher temp. rise with lower flow rate). All tankless water heaters operate on the same principle.

Therefore for example, when the incoming water temperature is 70°F or more, the output temperature will be at least 94°F at 1.0 GPM. (70 + 24 = 94. 

Possible shower flow rates: 1.5 to 2.5 GPM. Sink flow rates vary from 0.5 to 2 GPM. If you want to determine whether points of use other than a sink will produce at least 105°F, then calculate that with the data mentioned here.

This heater requires one 30 amp single pole breaker. If it will not produce the desired flow rate and temperature rise, then choose another model with more kW and amps, and ensure that you can supply it with the required electrical capacity.

This is a summary. For a better, more complete explanation of how to choose a tankless water heater for an RV, read our article at blog.gadgetsgo.com.

GadgetsGo is one of the first Authorized Ecosmart Dealers, since 2009. Feel free to ask us any other questions.

Kind Regards,
John M.
GadgetsGo

## Customer Reviews

### ⭐⭐⭐⭐⭐ It solved my problem at a second kitchen sink perfectly ...
*by C***E on June 25, 2018*

It solved my problem at a second kitchen sink perfectly. Had an initial kink in that it did not work and marked E1 on the display which I could not find its meaning anywhere. Was finally able to contact the manufacturer who sent me a heat sensor to replace the problem. When I opened the casing I discovered that the sensor had not been plugged in. It has been working well since.

### ⭐ Almost Warn not hot
*by A***R on November 8, 2024*

Pro: Small and tidy , turns on when you turn on the water and then turns off when you close the water so pretty energy saving. Con: Its not really hot, although the temp monitor shows 90s yet you get maybe mid 70s, also water pressure gets reduced a bit and you can't turn on the cold water to get pressure since the temp is not that hot.

### ⭐⭐⭐⭐⭐ I thought it might be DoA like others reported
*by E***1 on October 30, 2017*

Works well enough for a sink, and only that. Nobody should be under any illusions this is meant for anything but.. When I first hooked it up, purged the air, turned on the electric and hit the power button, nothing happened. I thought it might be DoA like others reported; sure I wired it correctly as the other 120v device on the same circuit was working, I tried running some water, and boom it lit up. For some reason the power button will turn on/off when no water is flowing, but the LED display will not illuminate unless so. Live in southern California, Santa Barbara, its almost September, ground water is getting fairly cold. Heats only about 0.25GPM to "hot" ~95-100*. Thinking of replacing with the 6kw, uses the same wiring just gotta make room in my panel for another double pole breaker.

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*Product available on Desertcart Slovakia*
*Store origin: SK*
*Last updated: 2026-03-07*