Which heating method would you choose and why?

the parameters don't really play a big role in this case :confused:

I mean, they always play a role.

Where do you see a possible alternative?

Alternatives are basically all solutions established on the market. Whether they prove to be economical for the special case can be found out with an appropriate calculation.

regards

@€uro With so many unknowns, your answer doesn't really surprise me. A binding fixed value is currently only the heating load according to EN 12831. The rest are variable costs and forecasts. I would therefore not necessarily call a calculation the result, but a simulation model. Best regards

With so many unknowns, your answer doesn't really surprise me now.

Correct. Therefore, answering the question, "Which heating system is the right one," is not so easy at all.

A binding fixed value is just the heating load according to EN 12831.
The rest are variable costs and forecasts.

Even the heating load is, in my opinion, a forecast. The investment costs are certainly fixed after obtaining an offer.

I would therefore not necessarily call a calculation the result,
but a simulation model.

Well, what the child is named is, in my opinion, secondary. As long as there are no other possibilities for an objective comparison, this type seems much more reliable than assumptions, estimates, gut feelings, and whatever else is currently available.

best regards

@€uro

in a calculation I expect a concrete value, or at least something legally binding like the heating load.

In fact, the graphic only reflects a state model, in which subjective estimates and gut feelings also play a role at many points. That means you get many possible results depending on which parameters you change. Of course, this can illustrate well what it means, for example, if you leave the windows open. But this can also be predicted by someone who cannot calculate at all.

Even a Total Cost of Ownership (TCO) model is a best-practice approach.

For a Life Cycle Costing (LCC), the most important parameter, the duration of the life cycle, would already be missing.

Of course, CA techniques are very helpful, e.g., in accident simulation where defined variable quantities also exist. Here you can even step fully on the gas pedal instead of the brake.

Best regards

In a calculation, I expect a concrete value,

You get that with this calculation.

In fact, however, the graphic only represents a state model, in which subjective estimates and gut feeling also influence many parts. That means you get many possible results, depending on which parameters you change.

Are you sure you understood that correctly? I'm not so sure about that.
best regards

According to this model, there are infinitely many calculation results, which can also be freely manipulated via the parameters. This is of course also the purpose of the simulation model in CA techniques.

Example annual demand. Just the variable user behavior alone ranges from always closed windows due to the ventilation system, to me sleeping and cooking only with tilted windows.

That means, concretely, I only know a minimum and a maximum; anything in between can be possible in everyday life.

Since you can only calculate with numbers and obtain concrete results, "objective mathematics" ends here.

A result is only obtained if the user behavior is subjectively estimated (if you know the users) or otherwise arbitrarily determined.

The next parameter would then be the climate,...

Note well, I am only talking here about a partial result of the left side according to the model.

No offense to your efforts to consider as many factors as possible. If you do that and guarantee it, every builder and architect will be pleased.

Best regards