Rheem RXHJ-21B10J-1 Electric Heater Kit 10 Kw 2 Ton

Product Description

The RHEEM RXHJ-21B10J-1 is an electric heater kit rated at 10 kilowatts (kW) for use in 2-ton air handler systems. It provides supplemental or emergency electric heat by integrating directly into a compatible air handler cabinet. The kit includes a built-in circuit breaker, which simplifies the electrical installation by eliminating the need for a separate disconnect in many configurations. Licensed HVAC technicians install this kit as part of a split-system heat pump or straight-cool setup that requires electric strip heat capability. The assembly is designed to mount inside the air handler and connect to the existing blower and control wiring.

This heater kit is suited for residential air handler applications where electric resistance heat is required as primary supplemental heat or as emergency backup heat in a heat pump system. It is sized for 2-ton equipment and is a common field-installed accessory on qualifying RHEEM and Ruud air handler units. The integral circuit breaker provides overcurrent protection for the heating element, streamlining compliance with NEC requirements for electric heating equipment.

Key Features

• 10 kW electric resistance heating output for 2-ton air handler systems
• Integrated circuit breaker provides built-in overcurrent protection
• Field-installed accessory kit designed for air handler cabinet mounting
• Suitable for supplemental or emergency heat in heat pump applications
• Eliminates need for a separate electrical disconnect in qualifying installations

Compatibility

Designed as an OEM-style electric heater kit accessory for qualifying 2-ton RHEEM and Ruud residential air handler units that accept the RXHJ series heater kit configuration. Consult the air handler installation manual to confirm heater kit compatibility before installation.

Installation Notes

Installation must be performed by a licensed HVAC technician in accordance with NEC Article 424 governing fixed electric space heating equipment. Disconnect and lock out all electrical power to the air handler before opening the cabinet or handling the heater kit. Verify that the unit voltage and ampacity ratings match the existing electrical supply before energizing. Do not bypass or modify the integrated circuit breaker.

Technical Specifications

• Heating Capacity: 10 kW
• System Size: 2 Ton
• Circuit Breaker: Included

Standard Information

• Brand: RHEEM
• Manufacturer Part Number: RXHJ-21B10J-1