Lennox 77M09 Box 322056-301 Always verify the L140-30 specification

Always verify the L140-30 specification on the existing component to ensure proper differential settings and equipment compatibility

simplifying field wiring in tight plenum spaces

Vibration Dampening: Integrated foam pad stabilizes the probe against high-velocity airflow

Utilizing a high-grade burner mounting gasket like the 100208092 prevents combustion byproduct leakage and supports the low NOx emission standards of premix burner configurations

Lennox 77M09 Box 322056-301 Always verify the L140-30 specificationThe Lennox 77M09 Burner Box Side is a vital structural and functional component engineered for high efficiency gas furnace maintenance. As a critical part of the combustion housing assembly, this side panel provides the necessary containment for the burner sparks and flames, ensuring that thermal energy is channeled directly into the heat exchanger. For contractors performing a Lennox HVAC repair, the 77M09 serves as more than just a metal plate; it