for versatile system tuning

The primary difference is the input voltage requirements

covering a broad range of HVAC needs

Once a Rotolock seal is torqued

Lennox 12S59 Heater 326070-701 for versatile system tuningThe Lennox 12S59 (Model ECB25 10 P) is a high performance 10kW electric heat kit engineered for seamless integration with CBX25UH and CBX25UHV series air handlers. This OEM Lennox heater operates on a 208 240V single phase power supply, providing critical supplemental or primary heating in residential and light commercial forced air systems. As a terminal block style heat section, it is designed for simplified field installation, sliding directly into