Rheem RTEX-13 Residential Tankless Water Heater
Experience continuous, on-demand hot water with the Rheem RTEX-13 Tankless Electric Water Heater. This energy-efficient unit is ideal for single point-of-use applications, RVs, or mobile homes, thanks to its compact design. It operates at 99.8% energy efficiency and features self-modulating power control for consistent performance. Easily adjust the temperature in 1°F increments via the external digital display. Simplified installation with side water connections makes it a reliable and efficient upgrade for your hot water needs.
$288.00
Owner Satisfaction
4.0
/ 5
Category Rank
137
/ 182
#137 in Water Heaters
Price vs Category Average
-68%
Below average
Power
13
/ kW
Who it's for
- Compact and Space-Saving Design
- Precise Digital Temperature Control
- High Energy Efficiency
Who should skip it
- High Electrical Service Requirements
- Limited Flow Rate Capacity
- Susceptible to Hard Water Scaling
Key Specs
Power
13 kW
Voltage
240V
Amperage
54 Amps
Maximum Flow Rate
3.17 Gallon Per Minute
Required Breaker
60 Amp
Wire Size
6 AWG
Water Connection Size
1/2 Inch NPT
Weight
Approximately 8.5 to 10.0 lbs
Features
- Endless hot water on demand
- Highly energy-efficient operation
- Self-modulating power control
- Digital display for precise temperature
- Durable copper heating elements
- Compact design for easy placement
- Adjustable temperature in 1°F increments
- Simple side water connections
What customers say
Consumers highly value the Rheem RTEX-13 for its compact design and easy installation, making it excellent for freeing up utility space. Its digital control offers precise temperature adjustments. Satisfaction is strongest when the unit is used for low demand, point-of-use applications, such as a single sink in warmer areas, where it delivers instant, efficient hot water. However, performance significantly degrades when used as a whole house solution or in colder climates due to flow rate limitations. Users who correctly match the 13kW capacity to their specific needs find it an excellent value. Those expecting higher capacity often report insufficient heating, emphasizing that understanding its limitations is key to a positive experience.
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