While this is a single-speed 1

System Safety: Restores proper combustion airflow to prevent premature heat exchanger fatigue and safety switch tripping

It features a broad pressure range of 12" WC to 50 PSI and an adjustable differential of 5 to 35 PSI

The Modine 3H0400780002 Limit Switch is a critical OEM high limit safety control designed for precise thermal monitoring in Modine unit heaters

EWC Controls URD-14 Damper 318518-761 While this is a single-speedFor high performance zone control, the EWC Controls URD 14 Damper delivers professional grade reliability and precision airflow management. Built for contractors who require a robust solution, this 14 inch round motorized damper features an integrated Poron sealing gasket and a double layered blade design, ensuring a tight seal with less than 2% leakage even in systems with higher static pressures. The 24 gauge galvanized steel construction,