Airzone conducts annual air monitoring for several clients, who own or operate large multi-story buildings, ensure records of their air quality are maintained. Typical assessments include measuring comfort parameters and other contaminants which are directly linked to ventilation efficacy. We also investigate other possible contaminants of concern such as dust, VOCs and formaldehyde. Data are used to adjust ventilation rates as necessary to maintain a healthy work environment and to ensure workers are comfortable thus reducing complaints and maximizing workloads.