Adjustable Airflow: The 3-speed configuration allows technicians to fine-tune unit performance for better comfort and efficiency

the J21K-232 features an internal 5/16 inch hex screw that allows for adjustable differential pressure settings from 0 to 25 PSID while installed

Key Benefits for the Technician Manual Reset Mechanism: Critical for safety interlocks

Optimized Airflow: Designed with specific wire spacing to minimize system head pressure

this specific kit is sized for small base footprints (2–3

EWC Controls URD-7 Damper 321042-401 Adjustable Airflow: The 3-speed configurationThe EWC Controls URD 7 Damper is a professional grade 7 inch round motorized damper built for rigorous multi zone HVAC applications. Constructed from heavy 24 gauge galvanized steel, this unit features a single blade design with an integrated Poron sealing gasket to ensure a tight seal and minimal leakage at static pressures up to 1. 5 in. w. c. The MA ND5 actuator provides reliable 18 in lb torque using a three wire power open power closed