The Dwyer SAH22IN Smart Air Hood Balancing Instrument, Without Battery uses Patent-pending Quad Flow Design Technology to direct the circulating air patterns to provide a more even air flow that minimizes backpressure, enabling accurate readings. With the included hood stand and wireless communications to the handheld, a single operator can balance a branch in less time than traditional balancing teams. The SAH-22-IN is lighter than most traditional capture hoods, while the ergonomic design provides greater maneuverability and less physical strain. The SAH-22-IN includes the PredictAir Application Software which reduces the number of steps in the air flow balancing process using Predictive Balancing's Express Balance mode. Predictive Balancing is a method of predicting the optimal flow set point for each register and the order in which they should be adjusted, and guides the balancing technician on setting the optimal flow set point for each sequential terminal.