Thats a good read and breaks down the process pretty well. Thanks for the info.
One thing I noticed, (and I could be wrong) in the portion describing DIF. Are their calculations/ their equations incorrect and the final solution correct?
I think they are confusing the actual degrees and using a conversion factor on the ºC to ºF instead of just subtracting the amount directly from each.
I'll paraphrase/quote and post the portion I am speaking of, and see what ya'll get from it.
"So, if our daytime temp is 28ºC (82.4ºF) and night time 18ºC (64.4ºF)- DIF would be 10ºC (50ºF)."
While a temperature of 10ºC is equal to 50ºF, this does not seem to be correct when calculating the DIF. It should be 18ºF DIF between day and night temps.
Am I just high?

They do come to the correct conclusion later in the paragraphs.

I would hope no one (Americans) using the ºF temps scale would try to lower their temps 50º.❄??