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Quick specs
Power
13 kW
Voltage
240V
Amperage
54 A (60 A breaker)
Flow Rate
0.3–4.8 GPM
Temperature Range
80–140°F
Not sure this fits your unit?
Call us with your model number and we'll confirm the right part before you order.
RHEEM Professional Classic 13 kW Tankless Electric Water Heater 240 Volts RTEX-13
Endless Hot Water·13 kW, 240 Volts
-
- Free shipping — most items ship by the next day
Licensed HVAC technician required. Must be installed by a certified professional. Improper installation voids the manufacturer warranty.
Secure payment
VISA MC AMEX DISC PayPal Affirm CHECK
RHEEM Professional Classic 13 kW Tankless Electric Water Heater 240 Volts RTEX-13
Licensed HVAC technician required. Must be installed by a certified professional. Improper installation voids the manufacturer warranty.
Need help? (888) 292-0874
- Free shipping — most items ship by the next day
Secure payment
VISA MC AMEX DISC PayPal Affirm CHECK
In stock
In most items, small items ship same day. Complete systems ship next business day.
-
Need help? (888) 292-0874
- Free shipping — most items ship by the next day
Secure payment
VISA MC AMEX DISC PayPal Affirm CHECK
Quick specs
Power
13 kW
Voltage
240V
Amperage
54 A (60 A breaker)
Flow Rate
0.3–4.8 GPM
Temperature Range
80–140°F
Not sure this fits your unit?
Call us with your model number and we'll confirm the right part before you order.
RHEEM Professional Classic 13 kW Tankless Electric Water Heater 240 Volts RTEX-13
Professional Classic tankless electric water heaters offer continuous hot water quick and on demand for single point-of-use or multiple applications.
FEATURES
On demand, consistent and endless hot water
Compact and stylish with digital temperature control in increments of 1°F ranging from 80°F to 140°F*
99.8% Energy efficient
Robust copper immersion heating elements with brass top increases durability and are threaded for easy replacement
Simple Installation
Digital temperature display
External controls to adjust temperature in increments of 1°F*
APPLICATIONS
Whole-Home – up to 6 GPM
Water-Saver Shower Head – 1.5 GPM
Standard Shower Head – 2.0 GPM
Standard Hand Sink – 0.5 GPM
Kitchen Sink – 1 to 2 GPM
Bath Tub – >= 4 GPM
Dishwasher – 1 to 2 GPM
Washing Machine – 1 to 1.5 GPM
DIMENSIONS
Height: 6.75
Length: 14
Width: 10.3
Why homeowners choose NAW
Genuine OEM parts
Every part we sell is the real thing — authorized, factory-genuine, and backed by the full manufacturer warranty.
Easy online ordering
Find your part by model number, add to cart, and get it delivered to your door — no middleman, no markup.
30-day hassle-free returns
Ordered the wrong part? Send it back within 30 days.
Help when you need it
Not sure if this is the right part? Call us at (888) 292-0874 and we’ll help you find the correct replacement.
Key features
- Endless Hot Water — on-demand for point-of-use or multiple applications
- 13 kW, 240 Volts — Rheem Professional Classic tankless electric heater
- Digital Temperature Control — precise 1°F adjustments
- Compact and Stylish — space-saving wall-mount design
Dimensions
Height 6.75 in.
Width 10.3 in.
Length 14 in.
Customer reviews
What buyers are saying
Verified reviews from customers who purchased this product.
5.0
3 verified reviews
JF
James F
The 13KW RHEEM Electric Tankless Water Heater RTEX-13 provides endless hot water with incredible efficiency, making every shower and sink usage a seamless experience. With its excellent price and powerful performance, this water heater is a game-changer for anyone looking to upgrade to reliable and energy-saving hot water on demand!
LF
Liam F
The 13KW Rheem Electric Tankless Water Heater RTEX-13 exceeded all my expectations with its fast heating and consistent performance at an unbeatable price! It’s compact, energy-efficient, and perfect for providing endless hot water, making it a must-have for anyone looking to upgrade their system.
YW
Yuri W
The 13KW RHEEM Electric Tankless Water Heater RTEX-13 blew me away with its performance and unbeatable price! It heats water instantly and consistently, providing endless hot water without the hassle of a bulky tank, making it a game-changer for any home.
