Bard 8408 038 Protect Stat 326058 756 Rugged Construction: Durable aluminum body Rugged Construction: Durable aluminum body paired with NEMA 4 4X RedHat II epoxy molded solenoid for extreme environment resilience Check your equipment's nameplate to ensure this switch's 40°F differential is compatible with your furnace's cycling requirements this freeze stat is essential for both cooling only and heat pump units to protect the indoor coil during high moisture or low airflow conditions this stat is mounted near the indoor blower or directly on the evaporator coil face to accurately sense the coldest air moving across the fins