High-quality construction maintains capacitance stability across extreme operating temperatures

While often used for diagnostics

plate-mounted Class 2 energy limiting transformer designed for reliable power distribution in industrial heating and air conditioning control circuits

This SPST normally closed switch serves as the primary protection against heat exchanger overheating

Always verify the terminal configuration against your original part before installation

Zonefirst OAS Air Sensor High-quality construction maintains capacitance stabilityFor veteran technicians managing dual fuel HVAC systems, the ZoneFirst OAS Air Sensor is a critical component for achieving precise balance point control. This outdoor air sensor is engineered specifically to integrate with ZoneFirst H32, H32P, and MDP3 control panels, providing real time ambient temperature data to the fossil fuel heat pump logic. By utilizing a high accuracy thermistor housed in a UV stabilized polycarbonate enclosure, the OAS