Lennox 99M70 Heat Strip

The Lennox 99M70 Heat Strip is a professional-grade 15 kW electric heat kit engineered for high-output supplemental heating in residential and light commercial air handlers. Designated as model ECB26-15CB-P, this genuine OEM component integrates seamlessly into Lennox CB26UH-R Series Air Handlers, providing approximately 51,150 BTUH of thermal capacity. Operating on 208/230V single-phase power at 60 Hz, the assembly features an integrated circuit breaker that satisfies many local code requirements for a unit-mounted disconnect while providing critical overcurrent protection. The heating elements are constructed from high-grade nichrome wire in a helix configuration, ensuring rapid heat transfer and maintaining low element surface temperatures for extended service life. Field installation is streamlined within the unit cabinet, bolstered by factory-mounted relays and manual-reset thermal limit controls for maximum system safety.

Key Benefits for HVAC Professionals:

• Universal Application: Engineered specifically for Lennox ECB26 series equipment, ensuring a direct-fit without field modifications.
• Enhanced Safety: Built-in circuit breaker protection guards against short circuits and continuous overloads.
• Precision Heating: Delivers a consistent 15 kW output, making it suitable for primary heating in temperate climates or supplemental backup for heat pump systems.
• Efficient Integration: Features factory-wired 24VAC transformer leads for straightforward control circuit connection.
• OEM Reliability: Manufactured to strict Lennox specifications to maintain the original UL/ETL listing of the air handler.

Common Questions & Technical Insights:

Which Lennox air handlers are compatible with the 99M70?
This 15 kW kit is primarily designed for the CB26UH-R air handler series. Always verify the cabinet size and minimum circuit ampacity (MCA) on the unit nameplate before installation.

Can this heat strip be used with 208V systems?
Yes, it is rated for 208/230V operation. For 208V applications, technicians must move the transformer primary lead from the 240V terminal to the 208V terminal to ensure proper control voltage.

Does this kit require a separate external disconnect?
In many jurisdictions, the integrated circuit breaker on the 99M70 qualifies as the local disconnect. However, contractors must consult local electrical codes to ensure compliance with specific regional requirements.

This item is not eligible for free shipping.

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.