
Lennox 12S08 Heater
The Lennox 12S08 ECB25-7.5CB-P is a high-performance 7.5kW electric heat kit engineered for seamless integration with Lennox air handlers like the CBX25UH and CBX25UHV series. This field-installed heater provides a reliable 25,600 BTUH of supplemental or primary heating capacity, making it an essential component for split system configurations in residential and light commercial applications. Built with helix-wound nichrome heating elements, the unit ensures instantaneous heat transfer and consistent airflow temperatures across the heat exchanger. The 12S08 model features a built-in 45-amp circuit breaker, providing essential overcurrent protection and simplifying the electrical installation process by meeting local code requirements for a unit-mounted disconnect. Operating at 208/230V single-phase power, this 7.5kW heater is designed for high-duty cycle reliability and long-term durability in demanding HVAC environments. For contractors, the plug-and-play wiring harness allows for rapid commissioning and precise staging when paired with compatible Lennox HVAC equipment.
Key Benefits- Direct Heat Transfer: Exposed nichrome elements provide immediate thermal response and prevent hot-spot degradation.
- Integrated Protection: Factory-installed 45A circuit breaker eliminates the need for separate external disconnects in many jurisdictions.
- Versatile Application: Optimized for use in 1.5 to 5-ton air handlers, supporting upflow, horizontal, and downflow (with rotation) configurations.
- Durable Construction: Heavy-gauge galvanized steel frame aligns perfectly with Lennox air handler cabinets for a vibration-free fit.
- Which Lennox air handlers is the 12S08 compatible with? It is primarily designed for the Merit Series CBA25UH and CBX25UH/V units, as well as several Armstrong and Aire-Flo branded cabinets.
- What are the electrical requirements for this 7.5kW kit? It requires a 208/230V, 60Hz, 1-phase power supply. Always verify the Minimum Circuit Ampacity (MCA) on the air handler nameplate after installation.
- Can this be used for downflow applications? Yes, but the circuit breakers must be rotated 180 degrees to comply with safety standards when the air handler is in the downflow position.
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.
Original: $275.39
-65%$275.39
$96.39Lennox 12S08 Heater
The Lennox 12S08 ECB25-7.5CB-P is a high-performance 7.5kW electric heat kit engineered for seamless integration with Lennox air handlers like the CBX25UH and CBX25UHV series. This field-installed heater provides a reliable 25,600 BTUH of supplemental or primary heating capacity, making it an essential component for split system configurations in residential and light commercial applications. Built with helix-wound nichrome heating elements, the unit ensures instantaneous heat transfer and consistent airflow temperatures across the heat exchanger. The 12S08 model features a built-in 45-amp circuit breaker, providing essential overcurrent protection and simplifying the electrical installation process by meeting local code requirements for a unit-mounted disconnect. Operating at 208/230V single-phase power, this 7.5kW heater is designed for high-duty cycle reliability and long-term durability in demanding HVAC environments. For contractors, the plug-and-play wiring harness allows for rapid commissioning and precise staging when paired with compatible Lennox HVAC equipment.
Key Benefits- Direct Heat Transfer: Exposed nichrome elements provide immediate thermal response and prevent hot-spot degradation.
- Integrated Protection: Factory-installed 45A circuit breaker eliminates the need for separate external disconnects in many jurisdictions.
- Versatile Application: Optimized for use in 1.5 to 5-ton air handlers, supporting upflow, horizontal, and downflow (with rotation) configurations.
- Durable Construction: Heavy-gauge galvanized steel frame aligns perfectly with Lennox air handler cabinets for a vibration-free fit.
- Which Lennox air handlers is the 12S08 compatible with? It is primarily designed for the Merit Series CBA25UH and CBX25UH/V units, as well as several Armstrong and Aire-Flo branded cabinets.
- What are the electrical requirements for this 7.5kW kit? It requires a 208/230V, 60Hz, 1-phase power supply. Always verify the Minimum Circuit Ampacity (MCA) on the air handler nameplate after installation.
- Can this be used for downflow applications? Yes, but the circuit breakers must be rotated 180 degrees to comply with safety standards when the air handler is in the downflow position.
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.
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Description
The Lennox 12S08 ECB25-7.5CB-P is a high-performance 7.5kW electric heat kit engineered for seamless integration with Lennox air handlers like the CBX25UH and CBX25UHV series. This field-installed heater provides a reliable 25,600 BTUH of supplemental or primary heating capacity, making it an essential component for split system configurations in residential and light commercial applications. Built with helix-wound nichrome heating elements, the unit ensures instantaneous heat transfer and consistent airflow temperatures across the heat exchanger. The 12S08 model features a built-in 45-amp circuit breaker, providing essential overcurrent protection and simplifying the electrical installation process by meeting local code requirements for a unit-mounted disconnect. Operating at 208/230V single-phase power, this 7.5kW heater is designed for high-duty cycle reliability and long-term durability in demanding HVAC environments. For contractors, the plug-and-play wiring harness allows for rapid commissioning and precise staging when paired with compatible Lennox HVAC equipment.
Key Benefits- Direct Heat Transfer: Exposed nichrome elements provide immediate thermal response and prevent hot-spot degradation.
- Integrated Protection: Factory-installed 45A circuit breaker eliminates the need for separate external disconnects in many jurisdictions.
- Versatile Application: Optimized for use in 1.5 to 5-ton air handlers, supporting upflow, horizontal, and downflow (with rotation) configurations.
- Durable Construction: Heavy-gauge galvanized steel frame aligns perfectly with Lennox air handler cabinets for a vibration-free fit.
- Which Lennox air handlers is the 12S08 compatible with? It is primarily designed for the Merit Series CBA25UH and CBX25UH/V units, as well as several Armstrong and Aire-Flo branded cabinets.
- What are the electrical requirements for this 7.5kW kit? It requires a 208/230V, 60Hz, 1-phase power supply. Always verify the Minimum Circuit Ampacity (MCA) on the air handler nameplate after installation.
- Can this be used for downflow applications? Yes, but the circuit breakers must be rotated 180 degrees to comply with safety standards when the air handler is in the downflow position.
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.












