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.
03/09/2019 - jeremy l.
12/07/2017 - Robert Q.
06/01/2017 - Shrey Mukeshbhai P.
Great material spreading real knowledge that a student need nowadays
03/05/2017 - Jack P.
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
07/29/2016 - Nicholas F.
05/14/2016 - Christopher T.
Very detailed course with some excellent practical tips on control of wood fired boilers