| Hey, some of your questions show a lack of understanding to me, hopefully I can clear those up.
Firstly "thermal energy" is a poorly defined phrase, and isn't used in scientific context very often. Do you mean internal energy? Or do you mean heat?
I assume you mean internal energy, which can be measured as temperature.
How does it heat your place of work? Well the second law of thermodynamics states that heat flows from a hotter body to a cooler body, which means that it flows from a body with higher internal energy to one with a lower internal energy. This is why hot things get colder and cold things get hotter when you leave them at room temperature. So, in the case of a radiator, it had hot water in it, which transfers heat to the cold metal radiator, which then transfers heat to the air in the room.
Now, where does the energy comes from. Generally for a boiler that heats a house, there is some fuel that is used (gas, coal, wood) that is burnt, this turns the chemical energy stored in the fuel into heat energy, which is then absorbed into water and piped through your radiators to keep you warm.
Your other questions don't make much sense. Without "thermal energy" we would all be dead.
Hope this helps a little bit | 
Linear Mode
