You lucky man. Inspecting like a fox in the hen house.
Gosh, I remember the first time I saw the Milnor direct inject fill through the door machines in operation. One of the advantages they gave was that it saturated the center of the load faster and better than other styles of filling. I believe it. The water comes through that hose like out of a fire hydrant.
The father of a friend in Scouts owned a laundry/dry cleaners. One night the troop went for an after hours tour. I was like a kid in candyland; at that age better than sex for sure and everyone had to at least pretend to be interested so I did not stand out quite as much. He told us that at conventions everyone has to brag about their boilers. He flipped the boiler on and within 15 seconds the steam was making the pipes ping as the heat hit them. He told us that on the coldest day of the previous winter when the low was 3 below and the high did not get out of the single digits, they still had one of the three big exhaust fans running. Working in a laundry during the summer would be almost bearable if you could do it almost naked, but they don't allow that, or at least didn't when I had to help in the hospital laundry for a couple of days. All of the 4 summer replacement guys on the 7 to 3 shift had to put in our time. I would have worked more than my assigned hours, but air conditioning sure felt good when I walked back into the cool basement halls on my way to take a required shower after working with pathogen-laden textiles.