This HVAC replacement part is built for professional-grade reliability in high-cycle residential and commercial environments

providing the necessary static pressure for efficient heat transfer in Bohn

making it a versatile solution for balancing blowers and pumps without the need for multiple fixed-diameter sheaves

Using a digital multimeter (DMM) set to continuity

The span is dictated by the valve stroke: use this spring for an 8 PSI span on a 5/16" stroke or a 12 PSI span on a 1/2" stroke to ensure proper calibration

IDEC Relays RH3B-UTAC24V Relay 322056-301 This HVAC replacement part isThe IDEC RH3B UTAC24V is a high performance 3PDT (3 Pole Double Throw) midget power relay engineered for precision switching in industrial control panels and HVACR systems. Operating on a 24VAC coil, this RH series relay provides a robust 10A switching capacity despite its compact footprint. The "T" designation signifies a top mount flange, allowing for direct surface mounting in tight enclosures where DIN rail space is at a premium. Featuring silver