I just purchased a new, very nice and basic (5,000BTU) in-window air conditioner and it does the job for my basic needs. But I have a question I probably have had for years but never had a proper venue to ask it: What the heck do the seemingly arbitrary numbers on the temperature dial mean? See picture below.
I completely understand how a value of “1” is the lowest (warmer) setting and “7” is the highest (cooler) setting, but what relative temperatures do these values relate to? And heck, why does the dial go from 1 to 7 instead of something more seemingly commonsense like 1 to 10?