Reports that as part of a long-term study of ventilation and indoor air quality in new office buildings, an environmental performance evaluation was conducted in a new office building in Overland, Missouri. Ventilation rates and carbon dioxide levels were monitored for two years. In this effort, automated tracer gas and CO₂ monitoring systems were employed to measure whole-building air change rates and CO₂ concentrations. Presents the measurement results. Discusses 1) the relationship between the building air change rate and indoor/outdoor temperature difference, 2) the average and maximum CO₂ concentrations in the HVAC return ducts and occupied spaces and 3) the relationship between the maximum daily CO₂ concentration and building air change rate.

KEYWORDS: Offices, USA, case studies, carbon dioxide, ventilation, air change rate, measuring, monitoring, automatic, new buildings, tracers, indoor, outdoor, temperature difference, sulphur hexafluoride