The VAV-DD7-S is a four input programmable field controller with two integral air flow sensors and seven binary outputs. Specifically engineered and UL-864 listed for use in smoke control applications1, the VAV-DD7-S provides pressure-independent control of any dual-duct variable air volume (VAV) box. As a native BACnet controller, it integrates seamlessly with your BACnet system, offering peer-to-peer communications at up to 76.8 Kbps on a BACnet MS/TP LAN.