In a steam boiler, the aggregate surface exposed to fire or to the heated products of combustion, especially of all the plates or sheets that are exposed to water on their opposite surfaces.

The heating of something at constant pressure.

Heating of rooms within buildings.

The heating of an electrical conductor by eddy currents induced by a varying magnetic field.

The heating of an electrically insulating material by a rapidly fluctuating electric field

plural of humid heat

A system for distributing heat generated in a centralized location for residential and commercial heating requirements.

Any of various heating systems in which a central source of heat is used to distribute heat (and sometimes hot water) throughout a building in a controlled manner.

More passion or conflict than enlightenment or illumination on a subject.

If you cannot handle the pressure, you should not remain in a position where you have to deal with it.