I’m staying in an apartment temporarily and I have absolutely no idea how it is heated. It’s a two-bedroom apartment. There is no thermostat. There are no vents. There is one radiator in the apartment’s living room, at the front and down the hall from the bedrooms, and one radiator in the bathroom.
I have felt every wall in my bedroom. All of them are cool. The floor is also a normal temperature.
And yet, despite it being at or below freezing most nights in the past month, I can be in my bedroom without a shirt on and be comfortable. It might be nice to be a little warmer, but I don’t feel cold or anything.
I am mystified. How is it being heated?
You are in the UK now so the chance of it being underfloor heating is very slim indeed unless you are in a new build from the last 5 - 10 years or so, even then I would doubt it though.
It is probably a combination of the amount of insulation we put in walls, floors and roof spaces along with the fact you downstairs neighbour or neighbours if there is a basement will be using theirs and obviously heat rises.
I know many people here that live in flats above other people that will never switch their heating on and live comfortably.
It is likely that those radiators are your only heat sources coupled with presumably a gas boiler to serve both the radiators and your hot water taps. There will be some kind of controls for it somewhere though, not all systems with have a thermostat in place. My current house has 3 radiators with no thermostat. It is either on or off or you can set time intervals for it to switch on and off by itself but there is no temperature based control.