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.

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

Rheem 18kW 240V Tankless Electric Water Heater

Rheem 18kW 240V Tankless Electric Water Heater

Product ID: 273292299

Details

Brand
Rheem
Capacity
18 gallons
Power source
AC Power
Product dimensions
36.8W x 46.4H
Special feature
LED Display

⚡18kW high power output

💧4.4 GPM flow rate

🔆±1° LED digital thermostat

4670.94 DT

Duties & taxes included

In stock

Sold byAmazon TunisiaDelivered 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 Tunisia.

Secure transaction

Description

🔥 Hot water on demand, without the bulk! ⚡

COMPACT SPACE SAVER - 90% smaller than traditional tanks, fits discreetly under sinks or tight spaces for modern living.
ENERGY SMART SELF MODULATION - Automatically adjusts power to match your hot water demand, cutting energy waste by up to 50%.
PRECISION TEMPERATURE CONTROL - External digital thermostat with LED display ensures exact hot water temperature to the degree.
DURABLE COPPER HEATING ELEMENTS - Field-serviceable dual copper immersion elements guarantee long-lasting, reliable performance.
EFFORTLESS INSTALLATION MAINTENANCE - Threaded 3/4 inch NPT water connections simplify setup and replacement, saving time and hassle.

The Rheem 18kW 240V Tankless Electric Water Heater delivers continuous, energy-efficient hot water with precise digital temperature control and a compact design. Featuring advanced self-modulation technology and durable copper heating elements, it offers up to 4.4 gallons per minute flow rate, saving space and cutting energy costs by up to 50%. Ideal for single or whole-home applications, this sleek unit installs easily and fits perfectly in modern, space-conscious homes.

Specifications

ASIN	B01MR7Z39V
Best Sellers Rank	183,316 in DIY & Tools ( See Top 100 in DIY & Tools ) 368 in Water Heaters & Parts
Brand	Rheem
Capacity	18 gallons
Colour	Silver
Country of Origin	China
Customer Reviews	4.3 out of 5 stars 28 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 Depth	14.5 inches
Item Dimensions W x H	36.8W x 46.4H centimetres
Item Type Name	Water Heater
Item Weight	6.7 kg
Manufacturer	Rheem
Material	Stainless Steel
Maximum Pressure	150
Maximum Temperature	140 Degrees Fahrenheit
Model Number	RTEX-18
Mount Type	Wall
Number of Items	1
Number of Packs	1
Part Number	RTEX-18
Power source	AC Power
Product dimensions	36.8W x 46.4H centimetres
Special Features	LED Display
Special feature	LED Display
Style	Whole Home, 18 kw
UPC	020352685335
Unit Count	1.0 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

Neha S.

Excellent communication throughout the order process. Product is perfect.

2 weeks ago

Sneha T.

Received my product in pristine condition. Great service overall.

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.

4670.94 DT

Duties & taxes included

In stock

Sold byAmazon TunisiaDelivered 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 Tunisia.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Suresh K.

Very impressed with the quality and fast delivery. Will shop here again.

4 days ago

Ali H.

Fast shipping and excellent packaging. The Leatherman tool feels very premium and sturdy.

1 day ago

View all Trustpilot reviews