OXBOX ELECTRIC HEAT KIT, PACKAGE UNIT, 20 KW, R454B

Capacity: ~ 20 kW of electric heat. For example, one listing shows a 20 kW electric heat kit for a package unit.

Voltage / Phase: Many kits of this size are listed for ~208/230/240 V single‑phase (in some markets). For instance, the Goodman 20 kW kit lists “Electrical 208/230/240 Volts / 1 Phase”.

Compatibility: Must match the packaged unit’s refrigerant, which in this case is R‑454B. One product listing shows an “Air Handler R‑454B Electric Heat Kit – 20 kW”.

Electrical data (like breaker size, current): For example, a document lists a 20 kW heater drawing ~72 A at 208/230 V, for a 15–18.4 kW heat kit.

Applications: Larger installations, colder climates, or systems requiring high electric heat capacity integrated with packaged units built for R‑454B.

Controls & safety: Typically includes features like sequencer‑controlled heating elements, over‑temperature limits, high limit switches, wiring harness for quick install, and must integrate with the packaged unit’s control board.