Monitored Performance of an Office Building with an Under-floor Air Distribution System

This paper documents the long-term detailed monitoring, short-term measurements, and observations in a commercial office building with an under-floor air distribution system (UFAD). The data collected over a 16-month period were used to evaluate the whole building performance, with a focus on the ventilation system, and were compared to existing building energy standards. The performance of the heating, ventilation, and airconditioning equipment was assessed and energy and ventilation improvements suggested. The building was found to fall within good practice and standard practice for energy usage in air-conditioned commercial office buildings for the United Kingdom.