Flushing Meadows Natatorium to revive the park, the original concept of a moderately sized pool was enlarged to an Olympic-size pool with an indoor ice rink as well. The building's foundation was completed in 2001 but after the September 11 attacks the project was halted due to funding issues. Finally, in 2003, the Natatorium was designated as the swimming arena in New York City's bid to host the 2012 Summer Olympics. The Parks Department partnered with the Economic Development Corporation and plans re-commenced for New York City to build its first public indoor swimming pool in 40 years. Upon its completion in February
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