Facility managers and occupants of ALL workspace structures deserve the benefits of an acceptable indoor environment and to be safeguarded from harmful levels of contaminants. The key to achieving these objectives in a very wide variety of sizes and types of systems, historically, has been through dilution ventilation. The focus is in the sufficiency of outdoor air volume provided to the breathing zone of the occupants, since most cases of Sick Building Syndrome are tied to insufficient ventilation. This is precisely why most codes and standards use minimum ventilation rates to define what they consider the absolute minimum amount of outdoor air needed for good IAQ. Low and high-rise buildings have different priorities but similar needs for pressurization and ventilation control reliability with minimum energy expenditures. EBTRON airflow measurement precision allows major efficiency improvements in control over indirect measurement methods and lower first costs than alternative instruments.