will this supply two showers, washer and dishwasher for two people? (1000 sf house)

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

Paperwork says it requires four 40 amp breakers or two DP 40 amp breakers. Max draw of 75 amps.

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?

Yes you could even go with the unit rtex-15 one smaller if that's it. Good luck

how many breakers and what amp.

The RTEX-18 (240 Volt) requires (2) 40 amp breakers and 8 AWG wire.

Rheem 18kw 240v Tankless Electric Water Heater Gray

Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

Help Track order

Account Cart

Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

Help Track order

Account Cart

799770CFA

Duties & taxes included

In stock

Sold byAmazon SenegalDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Senegal.

Secure transaction

Description

🔥 RTEX-18: Hot water on demand, savings on command!

COMPACT SPACE SAVER - 90% smaller than traditional tanks, fits discreetly under sinks or tight spaces—maximize your living area.
EFFORTLESS INSTALLATION - Threaded 3/4 inch NPT water connections simplify setup, making DIY upgrades a breeze for savvy homeowners.
DURABLE DUAL COPPER ELEMENTS - Field-serviceable copper immersion heaters guarantee long-lasting performance and easy maintenance.
ENERGY SMART SELF MODULATION - Advanced self-modulating tech adjusts power dynamically, slashing 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.

The Rheem RTEX-18 is a high-efficiency, tankless electric water heater delivering 18 KW of power and up to 4.4 gallons per minute flow. Featuring a precise LED digital thermostat with ±1° accuracy and advanced self-modulating technology, it optimizes energy use to cut heating costs by up to 50%. Its compact design is 90% smaller than traditional tanks, perfect for space-conscious homes. Durable copper immersion heating elements are field-serviceable, and simple threaded water connections enable straightforward installation. Ideal for single or multiple point-of-use applications, the RTEX-18 offers endless hot water with modern convenience and cost savings.

Specifications

ASIN	B01MR7Z39V
Best Sellers Rank	#7,721 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 4.2 out of 5 stars (2,177)
Efficiency	99.8%
Flow Rate	4.4 gpm
Global Trade Identification Number	00020352685335
Heat Output	18 KW
Included Components	Fittings, Aerators
Item Depth	18.25 inches
Item Dimensions W x H	14.5"W x 18.25"H
Item Type Name	Water Heater
Item Weight	14.8 pounds
Manufacturer	Rheem
Manufacturer Part Number	RTEX-18
Material Type	Stainless Steel
Maximum Pressure	150
Maximum Temperature	140 °F
Model Number	RTEX-18
Mount Type	Wall
Number of Items	1
Power Source	AC Power
Special Features	LED Display
Style Name	Whole Home, 18 kw
UPC	020352685335
Unit Count	1 Count
Voltage	240 volts
Wattage	18000 watts

Common Questions

Are the products genuine and authentic?+

Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

How long does delivery take and is it reliable?+

Delivery times vary by destination country, typically ranging from 3-9 business days. Each order is fully trackable through our system. We handle all customs clearance and use reliable courier partners for last-mile delivery. You'll receive regular updates about your order status via email and our app.

What is Desertcart? Is it safe to order from?+

Desertcart is an international e-commerce platform operating since 2014. We securely process thousands of orders globally each day. Every product goes through our quality verification process before delivery, and we provide end-to-end order tracking, 24/7 customer support, and a comprehensive returns policy to ensure a safe shopping experience.

How is product pricing calculated?+

Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Anita G.

Good experience, but the tracking updates could be better.

2 months ago

Yusuf A.

Fantastic experience overall. Will recommend to friends and family.

1 month ago

View all Trustpilot reviews

Shop Global, Save with Desertcart

Value for Money

Competitive prices on a vast range of products

Shop Globally

Serving millions of shoppers across more than 100 countries

Enhanced Protection

Trusted payment options loved by worldwide shoppers

Customer Assurance

Trusted payment options loved by worldwide shoppers.

Desertcart App

Shop on the go, anytime, anywhere.