How warm does it get in the heating room - Does a heater emit radiation?

Every electrical device generates heat, including a router. It’s the quantity that matters. It’s not without reason that many network cabinets, and not just server cabinets, have corresponding outlets for removing heat using fans.

If you also operate a washing machine and dryer in the utility room, even more heat is generated.

I have created enough reports; in almost 40% better and more thorough insulation should have been done

Millimeterhermänner, pst.
A utility room without heating, 10 sqm, in it, besides the gas boiler, there is also a hot water storage tank, a dryer, a washing machine. The room is cool to cold. Well suited for storage. That is why we have also placed our pantry cabinet there.
The boiler practically does not heat the room at all. Karsten