Nordyne 922521 Heat Strip Kit

Engineered as a direct replacement for the legacy 904407, the Nordyne 922521 5KW Heat Strip Kit provides secondary heating for residential air handlers. This 240V, single-phase HVAC electric heater accessory is optimized for B5, B6, and HMG air handler compatibility, utilizing resistive elements to deliver 5,000 Watts of supplemental heat. A veteran technician will appreciate the plug-and-play wiring harness, featuring a standard 7-pin connector that integrates with the unit circuit board for seamless thermostat communication. The assembly includes high-temp limit switches and ceramic element supports to ensure thermal safety during high-static operation. Whether you are performing a Nordyne 5KW heat kit installation or a corrective 904407 to 922521 cross-reference swap, this OEM kit maintains factory airflow specifications and circuit integrity. Ensure your field power wiring is sized to meet the minimum circuit ampacity (MCA) listed on the air handler data plate to prevent nuisance tripping and ensure reliable cold-weather performance.

• OEM Compatibility: Specifically designed for Nordyne, Intertherm, and Miller B-Series air handlers without requiring cabinet modifications.
• Reliable Changeover: Updated replacement for the obsolete 904407 model, featuring improved thermal protection and updated electrical resistance elements.
• Efficient Integration: Direct-fit 7-pin harness eliminates the need for field splicing, reducing installation time on the job site.
• Optimized Heating: 5KW / 17,000 BTU output provides necessary emergency heat or supplemental capacity during defrost cycles.

Is the 922521 compatible with older 904407 units?
Yes, the 922521 is the official updated version for the 904407. It is designed to fit the same footprint and use the same electrical interface in compatible air handlers.

Does this kit include the circuit breaker?
This specific 5KW kit is typically a non-breaker model or designed for use in systems where the breaker is provided at the disconnect or on a separate bracket. Performance remains consistent across the H6HK series variations.

Can I use this for a 3-phase application?
No, this heating element is rated for single-phase, 208/240V residential power supply. Verify your site voltage and phase before completing the installation.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.