Engman Public Natatorium Engman Public Natatorium The Engman Public Natatorium was a public swimming pool that operated in South Bend, Indiana between 1922 and 1978. Sources describe it as being the largest indoor swimming pool in the state of Indiana when it first opened in 1922. The pool has a history of racial exclusion, barring African Americans completely between 1922 and 1936, then segregating against them (by day) between 1936 and 1950. In 2010, after sitting vacant since 1978, the building re-opened as the home of the Indiana University South Bend Civil Rights Heritage Center. As of 2016, the Center continues to operate
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