This is in reference to the question of why a slightly dripping tap will keep a pipe from freezing.
Staffer Ken fails to mention the important issue of latent heat. Simply cooling water to 32 F (0 C) will not make it freeze. You have to remove an large amount of extra heat in order to get the phase transformation from liquid to solid – and water has a substantial “latent heat of freezing”.
So, even a slightly dripping introduces a lot of “hidden” heat energy into the pipe, which prevents freezing.
I’m a big fan of SD, usually it’s right on track – but this one missed the main issue, I think.