Underfloor heating heat load calculation - simply explained?

Depending on when you concluded the contract. From 01.01.2018 onwards, you have a claim to it.

Do you have an exact source for that? Is the information based on VOB/C?

Do you have an exact source for that? Is the information based on VOB/C?

I also express interest in the source. Our heating technician wanted to do the heat load calculation as well. But just copied down from the Energy Saving Ordinance verification and then into the program from Vaillant, so with the totally cold DIN temperatures.

Do you have an exact source for that? Is the information based on VOB/C?

No, as of 1/1/2018 it is stated like this in the Building Code. Paragraph 650xy