The system is now warming a house situated on a farm on the Swedish countryside.
I for sure have never done a project spanning so many different categories of work. In the end I had done manual metal work and welding, plumbing, electrical installation, creation of control- and calculation algorithms, circuit design and programming to name some.
A box on the upper floor of the house with an Atmega328 microprocessor controls the whole heating system.
Here is a video summary of the project:
Systems furnace is a Braland 21 from http://www.braland.se
The control system that is now up and running can among other things monitor 16 different temperatures, control all the systems pumps and do different kind of logging.