Found this today on another site
I have just skimmed the hydronic article (top link) but looks good read. page 6 - 14 should be a must read for diy’ers running below 140 on their boiler.
As the other author said - If you didn’t want to spend the money for books
, this series of articles by link are nearly as detailed as Siegenthaler’s books
but without as much algebra. And they are free.
Maybe that testimonial will get Yanche off my case regarding the "comic books
' I recommend.http://www.caleffi.us/caleffi/en_US/Sit ... /index.sdo