the 1/4" hex end is standard for many HVAC cover screws

Direct OEM Fit: Drop-in compatibility with Lochinvar 100133618 and A

Energy Conservation: The adjustable deadband minimizes energy waste by creating a neutral zone where neither heating nor cooling is active

extending service life in demanding climates

this board is specific to certain International Comfort Products and GREE outdoor units

Aprilaire 5455 Temperature Sensor 320819-301 the 1/4" hex end isThe Aprilaire 5455 is a critical low temperature sensor designed to maintain the integrity and efficiency of your dehumidification system. As a genuine OEM sensor, it provides precise monitoring of coil temperatures to prevent frost buildup and component damage. This Aprilaire sensor replacement is engineered specifically for compatibility with high capacity models, ensuring that HVAC freeze protection protocols are active when temperatures drop. By