It wasn’t called “Indoor Air Quality” yet, much less IAQ, but air treatment and the health benefits of an air conditioned environment were acknowledged more strongly in the 1960s than ever before. There were also great strides in understanding the role of refrigeration in food preservation.
“If the concept of ‘total air treatment’ were adopted, building design would not be hampered by the present requirement or ‘fetish’ for mechanical ventilation, and windows could be employed for the sole purpose of providing a view, suggests William L. McGrath, chief engineer of Carrier Corp.’s Unitary Equipment Div.” (The News, May 2, 1960).