Heating load calculation or room heating load

Good day everyone,

we are facing the topic of heating. It comes down to a brine heat pump. The underfloor heating and the pump are now to be optimally configured. ERR is more for the authorities in our case rather than for active use. So a good hydraulic balancing is already mandatory.

Now it's about the dimensioning of the heating. Stiebel Eltron, for example, offers a heat load calculation. However, this is apparently not a "room heat load" calculation. I rather think that it is a total calculation. How do heat load and room heat load differ? Do both have to be calculated independently, or how should this be approached? Should one have "only" a room heat load calculated?

Would appreciate some clarity in this jungle, thanks!

I'll just chime in quickly. Is my heating installer actually obligated to carry out a room heating load calculation? Or can I only hold him to a heating load calculation? We are building with a general contractor and I've lost some trust due to a few comments that my heating system will be planned with an optimal flow temperature.

So roughly: the total heating load is used for sizing the heat pump, the room-specific calculation for designing the underfloor heating.

So roughly: the total heating load is used for sizing the heat pump, the room-by-room calculation for designing the underfloor heating.

Thank you, that means you do a heating load calculation and select the appropriate heat pump. Later, the room-by-room calculation comes to design the underfloor heating? For sizing the heat pump, a room-by-room calculation is not yet needed?

But is the heating engineer obligated to carry out a room-by-room heating load calculation? Is there any DIN for that?

But is the heating engineer obligated to carry out a room-specific heating load calculation? Is there any DIN for that?

What does your contract with the main contractor state, only that is owed and can be demanded. However, you can only claim that from the main contractor and not from the heating engineer.