Rheem 18 kW Commercial Electric Heat Kit — RXJJ-G18KWC
The Rheem RXJJ-G18KWC is an 18 kW factory-matched electric heat kit for Rheem RACG Series large-commercial packaged air conditioners on 208/230V three-phase power. Engineered for slide-in installation in the unit's heater compartment, it provides approximately 61,416 BTU/h of supplemental electric heat so a cooling-only RACG rooftop (15–25 ton) can deliver heating as well.
Which Package Units Does This Heat Kit Fit?
The RXJJ-G18KWC is a factory-matched heater accessory, not a stand-alone unit. It is sized and wired specifically for Rheem RACG Series large-commercial package units (15–25 ton) wired for 208/230V three-phase power. Matching the heat kit to the exact package-unit series, tonnage, and voltage is essential — a kit built for another series or voltage will not fit the heater compartment or wire correctly.
At 18 kW it adds approximately 61,416 BTU/h of supplemental electric heat. The kit ships wired for slide-in, plug-and-play field installation with single-point power connection and a polarized low-voltage plug, and includes over-temperature limit protection.
Compatible package units:
Other heat kits in this family: 20kW RACD/G 208/230V (RXHE-AG020CC)
Always confirm heat-kit compatibility against your exact package-unit model and voltage before ordering. Not sure which kit you need? Request free help, contact Budget Heating, or call 813-885-7999.
What's Included
| Model Number | RXJJ-G18KWC |
|---|---|
| Product Type | Factory-Matched Field-Installed Electric Heat Kit (Heat Strip) |
| Heating Capacity | 18 kW — approx. 61,416 BTU/h |
| Compatible Series | Rheem RACG Series Commercial Packaged Air Conditioners |
| Electrical | 208/230V, 3-Phase, 60 Hz |
| Installation | Slide-in heater compartment, single-point wiring, polarized low-voltage plug |
| Protection | Over-temperature limit switch |
This heat kit is the correct factory accessory for the RACG package units listed above. It is not a stand-alone heater and cannot be used without a compatible Rheem package unit. Browse more Rheem equipment or the full packaged air conditioner lineup to pair this kit with a unit.
Unit Features
Heating & Construction
- 18 kW electric resistance heat — approximately 61,416 BTU/h of supplemental heating
- Wound-wire heating elements isolated with ceramic bushings for durability
- Two-stage resistive heating design on RACD/RACG kits for staged heat output
- Over-temperature limit switch protects against restricted-airflow conditions
- Factory-matched to the RACG cabinet's heater compartment
Installation & Electrical
- 208/230V, 3-Phase, 60 Hz rating — match to the package unit's supply voltage
- Slide-in, plug-and-play field installation in the heater compartment
- Single-point power wiring to a terminal block; UL-certified
- Polarized plug for the low-voltage connection
- Completely pre-wired to reduce field labor
Specifications & Manuals
Heater-kit installation, wiring, and application details are covered in the RACG package-unit installation manual. Always follow the unit and heater-kit instructions and confirm the maximum heat-kit size permitted for your specific model and voltage.
Frequently Asked Questions
What is the RXJJ-G18KWC and what does it do?
It is a 18 kW factory-matched electric heat kit (heat strip) that installs inside the heater compartment of a compatible Rheem RACG commercial package unit. It adds about 61,416 BTU/h of supplemental electric heat so a cooling-only rooftop can also provide heating.
Which package units is the RXJJ-G18KWC compatible with?
This kit is built for Rheem RACG Series large-commercial package units (15–25 ton) wired for 208/230V three-phase power. See the compatible-unit list above. Match the heat kit to your exact package-unit series, tonnage, and voltage — kits are not interchangeable across series or voltages.
What voltage does the RXJJ-G18KWC require?
It is rated for 208/230V, 3-Phase, 60 Hz and must be paired with a package unit on the same supply voltage. Using the wrong voltage kit will not wire or perform correctly.
How much heat does 18 kW provide?
Approximately 61,416 BTU/h (kW x 3,412). Actual delivered capacity depends on the applied voltage and airflow. Size the heat kit to the building's design heating load and the maximum kit size allowed for your unit.
Is the RXJJ-G18KWC hard to install?
No. It is pre-wired for slide-in, plug-and-play installation in the unit's heater compartment, with single-point power wiring to a terminal block and a polarized low-voltage plug. Installation must be performed by a qualified technician following the RACG installation manual.
Can this heat kit be used on its own?
No. It is a factory accessory that only works installed inside a compatible Rheem RACG commercial package unit. It is not a stand-alone heater.
