---
product_id: 724817007
title: "Rheem RTEX-18 18kW 240V Electric Tankless Water Heater, Small, Gray"
brand: "rheem"
price: "93194121CFA"
currency: XOF
in_stock: true
reviews_count: 5
category: "Rheem"
url: https://www.desertcart.sn/products/724817007-rheem-rtex-18-18kw-240v-electric-tankless-water-heater-small
store_origin: SN
region: Senegal
---

# 18kW high power output Up to 4.4 GPM flow rate ±1°F precise digital temp control Rheem RTEX-18 18kW 240V Electric Tankless Water Heater, Small, Gray

**Brand:** rheem
**Price:** 93194121CFA
**Availability:** ✅ In Stock

## Summary

> 🔥 Heat Smarter, Live Better — Never Run Out, Never Waste Energy!

## Quick Answers

- **What is this?** Rheem RTEX-18 18kW 240V Electric Tankless Water Heater, Small, Gray by rheem
- **How much does it cost?** 93194121CFA 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/724817007-rheem-rtex-18-18kw-240v-electric-tankless-water-heater-small)

## 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

- • **Smart Energy Saver:** Self-modulating technology adjusts power dynamically, cutting water heating costs by up to 50%.
- • **Space-Smart Design:** Compact and sleek, this unit is 90% smaller than traditional tanks—perfect for modern minimalist homes.
- • **Endless Hot Water Flow:** Delivers up to 4.4 gallons per minute, ideal for single or multiple mid-range household applications.
- • **Precision at Your Fingertips:** External digital LED display with ±1°F accuracy lets you customize comfort effortlessly.
- • **Effortless Installation & Maintenance:** 3/4" NPT bottom water connection and easy-to-replace heating elements make setup and upkeep a breeze.

## Overview

The Rheem RTEX-18 is a powerful 18kW 240V electric tankless water heater designed for efficient, on-demand hot water delivery. Featuring precise digital temperature control with LED display, advanced self-modulating technology for energy savings, and a compact footprint that fits seamlessly into modern homes, it provides up to 4.4 GPM flow rate—perfect for single shower or mid-range household use. Easy to install and maintain, this unit offers endless hot water while reducing energy consumption by up to 50% compared to traditional tank heaters.

## Description

This tankless electric water heater is ideal for the entire mid-range home use. This unit is ideal for Midwest single shower applications. The Rheem Performance Tankless Electric Water Heater provides endless water supply for continued use. The lower kilowatt unit can be used to supply hot water as needed for single or multiple use point applications. Meanwhile, higher kilowatts units can provide warm water to the entire house depending on the groundwater temperature at the entrance. Tankless electric water heater saves space, saves energy, saves money, and does not require airflow. The sleek and compact size is 90% smaller than the tank, so you can save space and place the unit anywhere you want. Tankless unit draws energy only when hot water flows, but traditional tanks always consume energy and keep the water in the tank at the desired temperature. Rheem self-modulating technology helps you save up to 50% on water heating costs

Review: Great product, have been using ours for 2 years and it works great.
Review: Bastante cumplidor aun para lo que yo esperaba ya que solo requiero una cantidad relativamente baja de agua caliente y da bastante mas de lo esperado, totalmente recomendable

## Features

- External digital temperature control with LED display (+/1 degree accuracy)
- State-of-the-art self-modulation, adjusts power to meet your hot water needs
- Durable copper dipped two heating elements, field available Flow Rate: Up to 4.4 GPM
- EASY INSTALLATION - 3/4" NPT water connection at the bottom
- Easy to replace screw, easy to install, digital temperature display

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Brand | Rheem |
| Model Number | RTEX-18 |
| Product Dimensions | 46.99 x 36.83 x 8.89 cm; 6.7 kg |
| Color | gray |
| Name List for Name Plates | Heater |
| Wallpaper Pattern | Minimalist, Modern |
| Voltage | 240 Volts |
| Wattage | 18000 W |
| Laser Class | LED Display |
| Included Components | Fitting Aerator |
| Are Batteries Included | No |
| Model Year | 2016 |
| Item Weight | 6.7 Kilograms |

## Product Details

- **Brand:** Rheem
- **Product Dimensions:** 36.8W x 46.4H cm
- **Special Feature:** LED Display
- **Color:** gray
- **Wattage:** 18000 W

## Images

![Rheem RTEX-18 18kW 240V Electric Tankless Water Heater, Small, Gray - Image 1](https://m.media-amazon.com/images/I/413AtC2RwvL.jpg)
![Rheem RTEX-18 18kW 240V Electric Tankless Water Heater, Small, Gray - Image 2](https://m.media-amazon.com/images/I/41N2livaKhL.jpg)
![Rheem RTEX-18 18kW 240V Electric Tankless Water Heater, Small, Gray - Image 3](https://m.media-amazon.com/images/I/41rSZEMYuAL.jpg)
![Rheem RTEX-18 18kW 240V Electric Tankless Water Heater, Small, Gray - Image 4](https://m.media-amazon.com/images/I/41tGuWwpeDL.jpg)
![Rheem RTEX-18 18kW 240V Electric Tankless Water Heater, Small, Gray - Image 5](https://m.media-amazon.com/images/I/51hVbPj6YsL.jpg)

## 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

### ⭐⭐⭐⭐⭐ Review
*by B***K on August 10, 2025*

Great product, have been using ours for 2 years and it works great.

### ⭐⭐⭐⭐⭐ Review
*by J***V on December 8, 2023*

Bastante cumplidor aun para lo que yo esperaba ya que solo requiero una cantidad relativamente baja de agua caliente y da bastante mas de lo esperado, totalmente recomendable

### ⭐⭐⭐⭐⭐ Review
*by A***R on April 1, 2022*

The unit was easy to install and I use the existing hot water tank as a preheat tank. We are on a well and the water is very cold coming up out of the ground, so I set the tank at minimum and it heats the well water to roughly ambient temperature. My gas bill has dropped by 70% and my electric bill has only risen about 3%. This is the only way to go!

## Frequently Bought Together

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*Product available on Desertcart Senegal*
*Store origin: SN*
*Last updated: 2026-02-11*