System Protection: Provides reliable proof of airflow to prevent coil freezing or compressor damage during low-flow conditions

contractors can transition from compressed air systems to precise electronic control without the labor-intensive process of replacing the entire valve body

the ST-D24 thermistor ensures tighter setpoint control and improved system efficiency across various air handling unit (AHU) configurations

this limit control switch is typically utilized in the 24V safety string but is rated for standard pilot duty applications found in York gas furnaces and package units

As the direct replacement for the legacy Bard 5651-094

ZoneFirst ZDS-30X10 Damper 30067439-890 System Protection: Provides reliable proofThe ZoneFirst ZDS 30X10 is a heavy duty rectangular zone damper designed for professional HVAC airflow management. Built with a sturdy extruded aluminum frame and parallel blades, this side mount damper is engineered for insertion into the 10 inch side of a 30" x 10" duct. It features a high torque 24VAC synchronous motor (Model MSS) that operates in a power closed spring return open configuration, ensuring a fail safe open position during power loss