We just dropped a new free course. Check out 10 Utility-Scale Solar Defects Hiding in Plain Sight!
Very informative and take time to understand each module. Its a lot of information to assimulate in a quick view.
As an older student, or forever student, I found this course as the perfect start to a planned deeper dive into the present day state of the art hydronic radiant floor design. You have to start somewhere and John can't be wrong.