I spotted a
presentation by John Siegenthaler, on the design principles for a hydronic system.
This presentation is based on knowing the information from the first lecture, and they give a link to the YouTube video of that one.
The quality of the lecture is just great. The information from the lecture is available in the company's magazine.
I give it all 5 Stars.
Very useful information if you're going to do radiant.
-AC