Lennox 12S77 Heater 320734-701 For technicians performing routine maintenance

For technicians performing routine maintenance or emergency repairs on dielectric union 2 inch fittings

this OEM replacement motor ensures synchronous operation across multiple fan segments

Designed for high-efficiency dual-stage furnaces

polytubing and standard barbed fittings

Lennox 12S77 Heater 320734-701 For technicians performing routine maintenanceThe Lennox 12S77 (Model ECB25 12. 5CB 9) is a high performance 12. 5KW electric heater kit specifically engineered for seamless integration with CBX25UH and CBX25UHV series air handlers. This auxiliary heat section provides reliable supplemental or emergency heating, ensuring system setpoints are maintained during extreme ambient drops. Designed for three phase power applications, the unit operates across a versatile voltage range of 208V to 230 460V,