Now having an office that gets its heat from a radiator, I have much sympathy for Alan Jacobs on the problems of maintaining a decent office temperature. The radiator has a scale that goes from--I am not making this up--0 to a little picture of a snowflake to 1 2 3 4 5. These correspond to no actual temperature. I have it on snowflake at the moment because, if the people running the boiler decide that it's cold, my office will become intolerably hot even at that level. This is inconsequential and, therefore, maddening.