The phrase "room air" refers to the air that is present in a room or indoor space. It represents the overall air quality, temperature, and humidity inside that specific area. Full definition
Living room air conditioning, free WiFi, and an in - unit washer / dryer all combine to add extra comfort. (crhmaui.com)
Note: Although human milk can remain in room air longer without significant increase in bacteria, it is better to place in cold storage as soon as possible. (bidmc.org)
Two bottles are used, one filled with room air and the other filled with CO2. (principia-scientific.org)