RXBH-24A20J-B – Rheem 20 kW Electric Heat Kit with Smart Plug

RXBH-24A20J-B Rheem 20 kW Electric Heat Kit

RXBH-24A20J-B is a 20 kW electric heat kit designed to add supplemental or primary electric heating capability to a compatible Rheem or Ruud air handler. It features Rheem’s Smart Plug connection system and operates on 208–240-volt, single-phase, 60 Hz electrical power.

This heat kit is installed inside an approved indoor air handler, where its electric heating elements warm the air circulated by the blower. It can provide dependable indoor heating for an all-electric HVAC system or serve as auxiliary heat when paired with a compatible heat pump.

RXBH-24A20J-B Heating Capacity

The RXBH-24A20J-B provides a nominal heating capacity of 20 kW. At rated conditions, 20 kW is equivalent to approximately 68,240 BTU per hour. Actual output can vary depending on the supplied voltage, air-handler configuration, airflow settings, installation conditions, and electrical service.

This level of heating capacity may be appropriate for larger residential HVAC applications, but the correct heat-kit size must be determined through an accurate heating-load calculation. Climate, insulation, windows, building size, air leakage, ductwork, and heat-pump capacity can all affect the required amount of supplemental heat.

Smart Plug Connection

The Rheem Smart Plug design helps provide a purpose-built electrical and control connection between the heat kit and a compatible air handler. This feature can help simplify installation when the heater is used with approved Rheem or Ruud equipment.

The Smart Plug name refers to the kit’s equipment connection and does not mean that the heater connects to a standard household wall outlet. The RXBH-24A20J-B requires a dedicated high-voltage electrical supply that must be installed according to the equipment nameplate, manufacturer instructions, and applicable electrical codes.

Electric Heat for Heat Pump Systems

When installed with a compatible heat-pump air handler, the RXBH-24A20J-B may provide auxiliary or emergency electric heat. Auxiliary heat can support the heat pump during colder weather, when the outdoor system alone may not satisfy the building’s heating demand.

Emergency heat operation may allow the electric elements to provide indoor heating when the outdoor heat-pump section is unavailable. The available operating modes depend on the complete system, thermostat, control wiring, equipment configuration, and installation settings.

208–240V Single-Phase Operation

This model is designed for 208–240V, single-phase, 60 Hz electrical service. A 20 kW electric heater creates a substantial electrical load, so the existing electrical panel and service capacity must be evaluated before installation.

A qualified professional must determine the necessary circuit configuration, conductor size, grounding, disconnecting means, and overcurrent protection. Never select electrical components using the 20 kW rating alone. Use the current installation instructions and electrical data listed on the heat kit and matched air handler.

Equipment Compatibility

The RXBH-24A20J-B is not a universal electric heater. It must be installed only in Rheem or Ruud air-handler models specifically approved for this heat kit. Brand, cabinet width, system tonnage, or physical fit alone cannot confirm compatibility.

Before ordering, compare the complete air-handler model number with the manufacturer’s accessory compatibility information. The air handler’s electrical rating, control board, blower capacity, available airflow, cabinet design, and approved heater options must all support the selected kit.

Airflow and Temperature-Rise Requirements

Proper airflow is essential when operating a 20 kW electric heat kit. Insufficient airflow can cause excessive temperature rise, reduce comfort, activate safety controls, or damage HVAC equipment. The air handler’s blower settings and duct system must provide the airflow specified by the manufacturer.

The installer should check the air filter, return-air opening, supply ducts, blower speed, static pressure, and temperature rise. A clean filter and correctly sized duct system help the RXBH-24A20J-B deliver safe and consistent heating performance.

Professional Installation Required

Installation should be completed by a licensed HVAC technician or qualified electrician familiar with electric resistance heating equipment. The technician must disconnect all power, follow the supplied instructions, secure the heating assembly, complete the Smart Plug connection, and verify all electrical and control wiring.

After installation, the system should be tested through every applicable heating stage. The technician should confirm correct amperage, blower operation, thermostat control, temperature rise, safety-limit operation, and secure electrical connections before placing the equipment into service.

Key Product Features

• Genuine Rheem electric heat-kit accessory
• 20 kW nominal electric heating capacity
• Approximately 68,240 BTU/h at rated conditions
• 208–240V electrical operation
• Single-phase, 60 Hz configuration
• Rheem Smart Plug equipment connection
• Designed for approved Rheem and Ruud air handlers
• Suitable for compatible all-electric HVAC systems
• May provide auxiliary or emergency heat for compatible heat pumps
• Requires professional sizing and installation

Explore additional electric heat kits available from Xpress Supply, or review the official Rheem RXBH-24A20J-B product information.

Important: Confirm air-handler compatibility, voltage, phase, electrical-service capacity, required airflow, wiring, overcurrent protection, and local code requirements before ordering or installing the RXBH-24A20J-B.