---
product_id: 38866492
title: "18kW 240V Tankless Electric Water Heater, Gray"
brand: "rheem"
price: "762806CFA"
currency: XOF
in_stock: true
reviews_count: 8
category: "Rheem"
url: https://www.desertcart.sn/products/38866492-18kw-240v-tankless-electric-water-heater-gray
store_origin: SN
region: Senegal
---

# 18 kW powerful heating 4.4 GPM flow rate ±1° LED digital thermostat 18kW 240V Tankless Electric Water Heater, Gray

**Brand:** rheem
**Price:** 762806CFA
**Availability:** ✅ In Stock

## Summary

> 🔥 RTEX-18: Hot water on demand, energy savings on repeat!

## Quick Answers

- **What is this?** 18kW 240V Tankless Electric Water Heater, Gray by rheem
- **How much does it cost?** 762806CFA with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sn](https://www.desertcart.sn/products/38866492-18kw-240v-tankless-electric-water-heater-gray)

## Best For

- rheem enthusiasts

## Why This Product

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

## Key Features

- • **Space-Saving Sleek Design:** Compact and wall-mountable, it’s 90% smaller than traditional tanks—ideal for modern minimalist homes.
- • **Energy-Smart Self-Modulation:** Advanced self-modulating tech adjusts power dynamically, cutting your water heating bill by up to 50%.
- • **Precision Temperature Control:** External digital thermostat with LED display ensures ±1° accuracy for perfect hot water every time.
- • **Durable Copper Heating Elements:** Dual copper immersion elements built for longevity and easy field servicing—reliability you can count on.
- • **Effortless Installation & Maintenance:** Threaded 3/4 inch NPT water connections make setup and replacement a breeze, saving you time and hassle.

## Overview

The Rheem RTEX-18 is a high-efficiency, tankless electric water heater delivering up to 4.4 gallons per minute with precise digital temperature control. Its advanced self-modulating technology optimizes power use, saving up to 50% on energy costs. Compact and easy to install, this durable unit features dual copper heating elements and a sleek LED display, making it perfect for whole-home or single-shower applications.

## Description

This tankless electric water heater is ideal for mid-range whole-home applications. This unit is ideal for single shower applications in the Midwest. The Rheem Performance tankless electric water heaters offer a continuous, endless supply of hot water. A lower kilowatt unit can provide hot water on demand for single or multiple point-of-use applications while a higher kilowatt unit could provide hot water for a whole house depending on the inlet ground water temperature. Tankless electric water heaters save space, save energy, save money, and require no venting. The sleek, compact size, 90 percent smaller than a tank, allows you to save space and place the unit wherever you want, including under a sink. Tankless units only draw energy when hot water is flowing, while traditional tanks are constantly drawing energy to keep the water in the tank at the desired temperature. Rheem's self-modulating technology can save Up to 50 percent on your water heating bill.

Review: Hot water - Works great and easy to install
Review: Great product! - Easy to install and keeps our water hot!! After a bad experience with our last one (different brand) we are so impressed with this one and hope it last us a long time! We have a 3bd 2ba and it keeps up with our water!

## Features

- External digital thermostatic control with LED display (+/1 degree accuracy)
- Most advanced self-modulation, adjust power to meet hot water demand
- Durable Copper immersion two heating elements, field Serviceable. Flow Rate- up to 4.4 GPM
- Simple installation – bottom 3/4 inch NPT water connections
- Threaded for easy replacement, simple installation, digital temperature display

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B01MR7Z39V |
| Best Sellers Rank | #4,891 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #1 in Water Heaters |
| Brand Name | Rheem |
| Capacity | 18 Gallons |
| Color | Gray |
| Customer Reviews | 4.2 out of 5 stars 3,874 Reviews |
| Efficiency | 99.8% |
| Flow Rate | 4.4 Gallons Per Minute |
| Global Trade Identification Number | 00020352685335 |
| Heat Output | 18 Kilowatts |
| Included Components | Fittings, Aerators |
| Is Electric | Yes |
| Item Dimensions W x H | 14.5"W x 18.25"H |
| Item Height | 3.5 inches |
| Item Type Name | Water Heater |
| Item Weight | 14.8 Pounds |
| Manufacturer | Rheem |
| Material Type | Stainless Steel |
| Maximum Pressure | 150 |
| Maximum Temperature | 140 Degrees Fahrenheit |
| Model Number | RTEX-18 |
| Mount Type | Wall |
| Power Source | AC Power |
| Special Features | LED Display |
| Style Name | Whole Home, 18 kw |
| UPC | 020352685335 |
| Unit Count | 1.0 Count |
| Voltage | 240 Volts |
| Wattage | 18000 watts |

## Product Details

- **Brand:** Rheem
- **Capacity:** 18 Gallons
- **Power Source:** AC Power
- **Product Dimensions:** 14.5"W x 18.25"H
- **Special Feature:** LED Display

## Images

![18kW 240V Tankless Electric Water Heater, Gray - Image 1](https://m.media-amazon.com/images/I/91J18WlAKqL.jpg)

## Available Options

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

## Questions & Answers

**Q: will this supply two showers, washer and dishwasher for two people? (1000 sf house)**
A: Hello-

Sizing an electric tankless is very difficult. I always recommend that you call Rheem at 800-432-8373 to get a suggestion. I want to say this will only keep up with ONLY 1 source of hot water at any one given time.

That being said, the RTEX-18 performance ( @240V )-
1.5GPM - 82degree rise
2.0GPM - 62degree rise
2.5GPM - 49degree rise
3.0GPM - 41degree rise

So.... what it can keep up with all depends on:
-the temp of water coming into the house
-the flow rate of each faucet/shower head/washing machine/source of hot water
-outlet temp desired

I hope this helped :)
Ben

**Q: How many amps**
A: Paperwork says it requires four 40 amp breakers or two DP 40 amp breakers. Max draw of 75 amps.

**Q: Rheem rtex-18  be big enough to heat water in my shop to wash my hands and perhaps take a shower in kansas city, mo?**
A: Yes you could even go with the unit rtex-15 one smaller if that's it. Good luck

**Q: how many breakers and what amp.**
A: The RTEX-18 (240 Volt) requires (2) 40 amp breakers and 8 AWG wire.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Hot water
*by A***R on December 31, 2025*

Works great and easy to install

### ⭐⭐⭐⭐⭐ Great product!
*by H***G on December 7, 2025*

Easy to install and keeps our water hot!! After a bad experience with our last one (different brand) we are so impressed with this one and hope it last us a long time! We have a 3bd 2ba and it keeps up with our water!

### ⭐⭐⭐⭐⭐ Flawless performance for years in a small home
*by R***S on October 31, 2025*

I’ve installed three of these, and all have worked flawlessly. One of them provides adequate hot water for a small home (2 adults) having a shower, lavatory, kitchen sink, dishwasher, and clothes washer. Although it can draw up to 46 amps, the 100 amp main breaker has never tripped in spite of having an electric stove, air conditioner, clothes dryer, and refrigerator/freezer. The customers are delighted even after three years of constant use. A central location is important, as is minimizing piping bends. Be sure not to overtighten the compression fittings at the entrance and exit of the device. A clog in the shower head caused the heater not to work (as designed) due to low flow. My guess is that anyone having problems usually has an upstream or downstream issue not related to the proper performance of the heater.

## Frequently Bought Together

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*Product available on Desertcart Senegal*
*Store origin: SN*
*Last updated: 2026-01-22*