This high-grade metal restrictor vent is engineered to precise tolerances to prevent the blower assembly from overworking

Constructed from heavy-duty galvanized steel to resist corrosion in high-humidity duct environments

Use a multimeter to check for 120V at the primary leads

provided the stem is not excessively pitted

IDEC Relays RH3B-ULAC24V Relay This high-grade metal restrictor ventAs a veteran tech, you know the value of a high capacity relay that actually fits in a tight control panel. The IDEC RH3B ULAC24V is a workhorse 3PDT (3 Form C) power relay engineered for industrial HVACR and automation systems where reliability is non negotiable. Operating on a 24Vac coil, this compact midget power relay handles a full 10Amp switching capacity, making it ideal for managing multiple circuits, motors, and solenoid loads simultaneously.