"One of the earliest methods of central heating involved the use of a boiler. In boiler systems, water is heated using a fossil fuel such as coal, oil, or propane. The water is allowed to convert to steam. It then travels through piping to the various rooms in the house. Each room has at least one radiator. As the name implies, heat energy radiates from this unit.<u> When the heat energy (in the form of infrared waves) encounters solid objects in the room, those objects absorb the energy and warm up. </u>Only a small amount of convection is involved in distributing heat from radiators."
"Radiant heat can also be obtained from electricity-based units. In these appliances, as electricity runs through wires, heat is generated. The wires may glow red. Again, this type of heat is radiated through the air and absorbed by solid objects. Many space heaters are radiant in design."
<em>-Alpha Omega Academy, Unit 2 (Heat Flow), Assignment 5 (Heating Systems)</em>
"Radiant heat passes through the air and <u>heats solid objects</u> making it highly efficient wherever it's installed. Because radiant heat is produced instantly, there is no need for expensive pre-heating. Infrared heaters provide heat and warmth quickly so you are able to save on the costs of heating seldom used areas."
<em>-Article : How do radiant heaters work? - AEI Corporation</em>
SO...
The answer is:
A) To nearby solid objects
<em>Hope this helps! :)</em>
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<em>By the way, I got this correct on my assignment! </em>
