Rheem RTEX-13 Tankless Water Heater
Best compact solution for single-point hot water in smaller living spaces.
This compact unit delivers endless hot water exactly where you need it, making it perfect for smaller spaces or specific fixtures. While it isn't designed to power an entire large household, its precise digital temperature control and impressive energy efficiency make it an unbeatable upgrade for targeted, on-demand heating.
$414.95
at
Tanklesswaterheaterdepot
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Who it's for
- Apartment dwellers needing to maximize limited utility closet space
- Homeowners wanting exact control over their shower temperature
- Budget-conscious users looking to reduce monthly energy consumption
Who should skip it
- Homeowners with older electrical panels lacking sufficient amperage
- Large families needing hot water for multiple simultaneous showers
- Residents in areas with hard water requiring frequent maintenance
Performance breakdown
Energy Efficiency
Near-perfect conversion rate minimizes wasted electricity during standby and operation.
Installation Simplicity
Side-mounted connections and compact footprint make retrofitting significantly easier.
Temperature Precision
Digital controls allow for exact, one-degree adjustments for consistent output.
Flow Capacity
Ideal for single-fixture use but struggles with simultaneous high-demand applications.
Build Durability
Copper heating elements provide reliable, long-term performance in residential settings.
Space Efficiency
Ultra-compact design fits easily into tight closets or under-sink areas.
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
Capacity
3.17 Gallon Per Minute Max Flow Rate
Heater Type
Tankless (On-Demand), Point-of-Use
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