Basically a Triangle in a wolfs clothing. Same trimax control, same heat x pretty much as their original design. I have installed a few as replacments for Munchie as they offer the upgrade to this boiler at an attractive price when leaker under warranty. If I am selling a new job I go usually with Triangle as they have supported me well. Good crew to deal with at Triangle. Heat transfer has not been Baaaad but Triangle much better.
They use the same electronics that HTP uses on all of it's residential boilers.
The new fire tube heat exchanger is the same one used by everyone.
I am installing one right now and don't see any problems with them.