J.H. Moores Memorial Natatorium the oldest continually operated municipal pool in the United States. The Natatorium is an ellipsoidal, above-ground structure constructed of reinforced concrete with a rubble-stone facade. The entrance is on one end through two pairs of metal doors, flanked by plaques which read "DESIGN SUPERVISED BY W. BINTZ, CITY ENGINEER, SWIMMING POOL DESIGNS, 1922" on one side and "J.H. MOORES MEMORIAL NATATORIUM. A.D. 1922" on the other. Decorative parapets project on each side of the entrance. Original window openings have been filled in. A balustrade of reinforced concrete runs along the top, with lamp posts at regular intervals. The interior contains
Indoor air quality ventilation. Instead of setting throughput at a fixed air replacement rate, carbon dioxide sensors are used to control the rate dynamically, based on the emissions of actual building occupants. For the past several years, there have been many debates among indoor air quality specialists about the proper definition of indoor air quality and specifically what constitutes "acceptable" indoor air quality. One way of quantitatively ensuring the health of indoor air is by the frequency of effective turnover of interior air by replacement with outside air. In the UK, for example, classrooms are required to have 2.5 outdoor air changes per