I am responsible for a church-run school which is currently heated by five 1997 Weil-McLain EGH series gas boilers, totaling 2,000,000 BTU, all controlled by a Tekmar 258 (it's a hydronic system; we've never seen more than three boilers running at a time). Two of them have cracked blocks and have been shut down; a third was rebuilt with a new block last fall; and the remaining two are probably not long for this world. Our mechanical contractor (whom I trust, and has a stellar reputation in the industry) is proposing keeping the one newly-rebuilt unit and installing three Lochinvar CBN 399 boilers. Does anyone have experience with Lochinvar, and with this particular line? I've read up on their products and have seen some mixed reviews, but those assessments seem more concerned with residential applications.
Thank you.
Thank you.