Ha, while funny it still doesn't work. If we use an interval scale with zero degrees Lat defined as 16 degrees Celsius, how many times hotter is zero degrees Lat than-1 degrees Lat? If you are using "temperature comfort" as your underlying property,, zero had to be the university defined "lack of all comfort" which I don't think you will find. Subjective comfort is notoriously difficult to make into ratio scale. Pain measurement is a well- known example.