The Lennox 27A22 (ECB47-9-P) 9kW Electric Heater Kit is a supplemental electric heating accessory designed for compatible Lennox air handler systems. It works by using electric resistance heating elements to generate heat, which is transferred to the circulating air as it passes through the air handler. This kit is used with compatible Lennox HVAC equipment to provide additional heati... https://www.partshnc.com/lennox-27a22-9kw-electric-heater-kit-ecb47-9-p