This means the valve remains in the closed position when de-energized and opens only when the 24Vdc power is applied

restoring the factory-specified CFM required for proper heat exchange and system longevity in residential air handlers and furnaces

500) and Reznor Venturion models 225 and 325

Integrated Pressure Taps: Includes 1/8" NPT inlet and outlet pressure bosses for accurate manometer readings during startup and commissioning

What components are required for a full installation

Bard HVAC 8612-043BX Board 321142-301 This means the valve remainsThe Bard HVAC 8612 043BX Main Controller Board is the core replacement component for the MC4001 series lead lag logic systems. Specially engineered for solid state dual unit controllers, this Bard part 8612 043BX manages the sequencing and operational cycling between two HVAC wall mount units. It is fully compatible with Bard MC4001 A, MC4001 AC, MC4001 B, and MC4001 BC models, ensuring seamless integration with existing low voltage control circuits.