The BACnet Fan Control’s installation saves up to 50 percent in labor/material costs versus adding an I/O connection for ERV BMS monitoring/control for commercial building IAQ. The proprietary control is a custom-engineered, BACnet MS/TP protocol device designed for facility managers and installation/service contractors that prefer quick, simple on/off and zero to 100 percent variable frequency drive (VFD) fan speed selections. Ideal applications are mall/strip center retail stores, classrooms, healthcare offices and other spaces that need to override idle, interlocked central air handling units when quick outdoor air induction from the ERV is needed for individual space IAQ enhancement.