ᐅ Heating load calculation or room heating load

Hello everyone,

We are currently dealing with heating. It will come down to a ground source heat pump. The underfloor heating and the pump now need to be optimally configured. The Energy Performance Certificate (EPC) here is more for official purposes rather than active use. So a proper hydraulic balancing is definitely mandatory.

Now it’s about the sizing of the heating system. For example, Stiebel Eltron offers a heating load calculation. However, this is probably not a "room heating load" calculation. I think it is more of an overall calculation. What is the difference between heating load and room heating load? Do both need to be calculated independently, or how should this be handled? Is it enough to have just a room heating load calculated?

I would appreciate some clarity in this jungle, thanks!

I’ll quickly add to this. Is my heating contractor actually required to perform a room heating load calculation? Or can I only insist on a heating load calculation? We’re building with a general contractor, and due to a few comments, I’ve somewhat lost confidence that my heating system is being designed with an optimal supply temperature.

So roughly: the total heating load is used to size the heat pump, while the room-by-room calculation determines the design of the underfloor heating.

Joedreck schrieb:

Basically, the total heating load is used to size the heat pump, while the room-by-room calculation is for designing the underfloor heating system.

Thanks, so that means you perform a heating load calculation to select the appropriate heat pump. Then later, the room-by-room calculation is done to design the underfloor heating? You don’t need the room-by-room calculation to size the heat pump?

But is the heating engineer required to perform a room-by-room heating load calculation? Is there any applicable DIN standard for this?

Crossy schrieb:

But is the heating engineer required to perform a room-by-room heating load calculation? Is there any DIN standard for this?

What does your contract with the general contractor (GC) state? Only what is specified there is owed and can be requested. However, you can only claim this from the GC, not directly from the heating engineer.