it utilizes a sensing bulb to monitor thermal load

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

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

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

a conversion kit may be required for LP applications

EWC Controls URD-7 Damper 321042-401 it utilizes a sensing bulbThe 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