Very usefull, i recomented it.
have morelecture
Excellent job you did in online
Very knowledgeable and easily understood.
provides profession / quality learning videos
I have seen the damage that low return water temperatures cause. I'm ready to correct my system and help others do the same. Great information, very helpful. A must watch if you are installing a biomass hydronic heater.
Great material spreading real knowledge that a student need nowadays
i have several of Johns books , as a mechanical hydronic plumber in Australia i find limited information on the subject , the combination of working with a Austrian employer and reading publications and taking classes like this expands my technical knowledge
Very detailed course with some excellent practical tips on control of wood fired boilers
very nice
course is good