RTEX-13 Rheem Electric Tankless Water Heater 13kW 1984236

The Rheem RTEX-13 Electric Tankless Water Heater is a compact, on-demand heating unit engineered for point-of-use and light-duty hot water applications. Designed for professional installation, the unit incorporates advanced electronic temperature control, copper immersion heating elements, and threaded water connections to ensure precise thermal response and consistent outlet performance in residential or commercial service configurations.

Technical Specifications

• Manufacturer: Rheem Manufacturing Company
• Model Number: RTEX-13
• Series: Professional Classic
• Part Number: 1984236
• Heater Type: Electric Tankless Water Heater
• Power Rating: 13,000 W (13 kW)
• Voltage: 240 V AC, single-phase
• Current Draw: Approximately 54 A
• Recommended Breaker Size: Dual 60 A (consult NEC and local code)
• Heating Elements: Dual copper immersion elements, threaded for field replacement
• Temperature Control: Digital electronic thermostat, adjustable in 1°F increments
• Flow Rate: 4.0 GPM (nominal, at optimum inlet conditions)
• Water Connections: 1/2 inch NPT
• Pressure Range: 25–150 psi
• Minimum Activation Flow: 0.3 GPM
• Enclosure: Metal housing with front access panel
• Mounting Orientation: Wall-mounted, vertical installation
• Applications: Point-of-use or multi-fixture residential/light commercial installations
• Compliance: UL and CSA listed; conforms to ANSI/UL 499

Summary

The Rheem RTEX-13 is a 13 kW electric tankless water heater engineered for contractors requiring a compact, serviceable, and code-compliant on-demand system. With copper heating elements, 1/2-inch NPT connections, and electronic temperature control, it delivers stable thermal performance under variable flow conditions. Suitable for integration in light commercial or residential mechanical systems where space efficiency and continuous hot-water delivery are required.