When you are protecting a medium to large commercial ASME Section IV boiler

Since this unit features 2 SPDT switches

Does this unit require a separate mounting kit

The 1/4-inch flare connections provide a mechanical gas-tight seal that stands up to vibration and thermal cycling without the need for brazing

Lennox 56W57 Panel Kit 322838-752 When you are protecting aThe Lennox 56W57 Vest Panel Corbol Kit is a critical OEM component designed to maintain the structural integrity and high performance standards of residential and commercial Lennox HVAC systems. Engineered as a direct fit for the vestibule panel, this kit facilitates precise airflow regulation and provides a secure housing for sensitive electronic furnace parts, including the integrated control board. Built to withstand the high thermal environments