Thank you for the brilliant explanation.
So can I say: There is heat in the room?
Thanks.
We wouldn't normally word it like that, we would say "It's hot in the room".
We might use "heat" in some circumstances, for example:
- We need a bit less heat in that room. Please turn the radiators down.
- It's freezing in here. We could do with a bit of heat so can you go and get the electric heater please?
But normally when talking about the temperature somewhere we use "It's hot/warm/chilly/cold/freezing/roasting etc"