First, one can see what seems to be a sleeve hanging from the laundry basket, this means to me the laundry consists of garments (doctor's white jacket's, nurse's uniforms,etc; the sleeve does not seem to be from any sort of isolation gown I ever saw).
Next, by federal and local laws, laundry contaminated by bodily fluids (operating room, isolation rooms/infectious wards/rooms etc) are separated on the floors by being put in to special clearly marked bags. Such laundry is handled differently from say bedding, towels, and laundry not grossly contaminated. As for "cooties", well this does seem modern, but hospitals existed long before modern antibiotics, and laundry workers could easily be infected by any number of germs that we deal with easily today. Staf, Strep, Flu, Ecoli, etc were common infections that killed many people before WWII and "miracle" drugs came on the scene.
The washer pictured seems like a cynlinder type washer, which can run upwards of over 500lbs capacity.
Air conditioning? Not very likely, laundries generate too much heat for that. Fans probably, but much has gone into commercial laundry design for today's plants, the the object is to keep all that heat within the washers/dryers/ironers, and not released into the area.
It is worth noting many hospitals, like hotels and other places which all used to have their own in house laundries, use laundry services and have closed down their plants. It just made sense, as hospitals were not in "the laundry" business, to have the expenses associated with a large laundry. Other hospitals that are members of the same care association, have one laundry for several hospitals, to spread costs around.
The biggest "news" in hosptial laundries are tunnel washers, where soiled laundry goes in one end, and clean laundry comes out the other. Combining washing with extracting means less heavy lifting for workers (which is rapidly being replaced by machines),and one less step.
L.