Editing 4 Times Square (section)

==== Air delivery ====
Fox & Fowle and Durst decided to use [[chiller]]s powered by [[natural gas]] to provide cool air to the offices.<ref name="Stephens p. 96" /><ref name="p398625408" /><ref name="Wells p. 134">{{harvnb|Wells|2005|p=134|ps=.}}</ref> At the time, many buildings still used [[fossil fuel]]s for power generation, and natural gas created much less pollution than other fossil fuels.<ref name="p398625408" /> Gas was used instead of electricity because gas could be stored for later use, while electricity had to be used when it is produced.<ref name="nyt19970928" /> According to [[Bruce Fowle]] of Fox & Fowle, the firm had contemplated using electric chillers, which could create and store ice at night, then use the ice to chill the offices during the daytime. Fowle said the firm had decided against using ice storage because it was more expensive than natural gas-powered chillers.<ref name="nyt19970330" /> After an upgrade in 2003, the building had {{cvt|4600|ST|LT t}} of air conditioning.<ref name="Electrical Contractor Magazine 2017" />

The air-delivery system provides 50 percent more fresh air than is required by New York City building code.<ref name="Case Study" /><ref name="n85616074" /><ref name="Wells p. 134" /> It can also be used to ventilate polluted air from specified floors; a separate exhaust shaft was designed for employee smoking areas.<ref name="p398625408" /> The air-circulation system was built so air on any set of three floors could be replaced every 24 to 48 hours.<ref name="n85616074" /> Sensors on each floor are used to monitor air quality, and the building's management team could adjust the air-delivery and ventilation systems as needed.<ref name="Wells p. 134" /><ref>{{cite web | last=Levitt | first=David M. | title=Office Air Filtration In the Spotlight as Workers Trickle Back | website=Commercial Observer | date=March 2, 2021 | url=https://commercialobserver.com/2021/03/office-air-filtration-covid-us/ | access-date=March 28, 2022}}</ref> Tenants could also independently adjust the heating and air-conditioning systems in their offices.<ref name="Wells p. 134" /> The building's climate control system was designed to operate in tandem with the wastewater system, further reducing energy use.<ref name="ZT p. 36" />