I am amazed at the new hospital down the street from my house.
It was opened last year and has a state of the art emergency room with gorgeous TVs in every single room.
They have robotics in the surgery ward as well. One thing that they utilize whenever sanitizing rooms is UV-C light. When a patient’s room or any other indoor space within the hospital needs a deep sanitization because of exposure to infectious diseases, the staff will use antiseptics before setting up huge UV-C lights and exiting the room. They close all windows and doors and activate the lights remotely so there is no danger of exposure to eyes or skin. The bulbs are extremely bright and will essentially irradiate anything on the surfaces or within the air inside the room being treated. While the UV-C bulbs that go inside air conditioners are nowhere near as bright and powerful as the ones used in hospital rooms, they’re still deployed for the same reason. The idea is to surround the evaporator coil with bright UV light to prevent the growth of fungus or bacteria. They’re effective as long as they’re replaced at least once a year. The UV-C lights will quit sanitizing surfaces and air moving through the air handler long before the bulbs quit emitting visible light. So you might assume the bulbs are still good when they’re in fact no better than an LED light for sanitation purposes. My HVAC tech knows about my UV-C light installation schedule so I don’t have to remember myself. That way the light bulbs are replaced at least once every 12 months to ensure that I constantly have a clean air handler on the inside.