this unit integrates seamlessly with RDM and ZDM dampers to manage bypass air without the need for complex field calibration

ensuring stable burner performance and optimal combustion efficiency

as the control logic is based on valve positioning and pressure/temperature sensor inputs processed through the main system controller

Full-Port Design: Minimizes pressure drop across the valve to ensure optimal mass flow rates

allowing you to combine values using the included jumper wires

Aprilaire 6404 Control 319852-301 this unit integrates seamlessly withThe Aprilaire 6404 Control is a professional grade 4 zone control panel designed to provide precise HVAC zoning solutions for both residential and commercial applications. This universal multistage zone controller is compatible with single stage heat cool, multi stage conventional (up to 2H 2C), and heat pump systems (up to 4H 2C). Featuring an LCD display for setup and LED status indicators for real time diagnostics, the Aprilaire 6404 simplifies the