Heat pump upstairs and infrared heating in the basement? Does that make sense?

Basement apartment, which is completely underground ... does the basement apartment have no windows??? This is the question everyone is asking here.

I can't imagine that people don't understand this. Of course, light wells are made so that enough light reaches downstairs. I even live right next to a house where it is exactly the same. Here, there are 3 steps but completely at ground level or one step to the ground floor is no problem.

Okay, maybe that could have been misunderstood. What I basically wanted to express is that the ground floor has at most one step from the street, meaning the basement is about 2.70m deep. There are houses where you go up 5 or more stairs, and in the basement you can look out the window. That is of course not the case here, rather colloquially it is completely underground with light wells for the windows. But in the end, that is not relevant anyway. I just wanted to understand how heating works down there. For example, our rental apartment has a basement that is also completely underground with light wells, and the temperature is actually always comfortable, even in winter. Of course, the boiler room is right next door, which certainly makes a difference. To me, it now seems that the basement generally requires less heating than, for example, the ground floor. Am I right about that?

You have to install underfloor heating. Everything else would be nonsense.