Topic Save on Hot Water Heating Bills
Conduction refers to heat flow by means of physical contact. Heat will Smart Energy Box instantaneously move from the skillet you are holding in your hand. Heat is ALWAYS transferred from hot to cold. Your home has conductive heat flowing through its walls. (Cool inside, hot outside - that's when heat is coming in.)
Radiation is a type of heat in the form of wave (like sound waves) that can travel across a vacuum or an air space. You can FEEL radiant heat without actually needing to touch the heat source. Using the example of the hot skillet once more, if you place your hand over the skillet, you will FEEL the skillet giving off heat without actually touching the device. Radiant heat is also capable of roasting marshmallows on a frosty night or making your face FEEL warm on a day when it's cold and sunny.
Radiant heat travels very fast - in fact, at the speed of light - until one of two things takes place: the heat (energy) is either REFLECTED or it's ABSORBED. Everything absorbs SOME amount of radiant heat. A dark roof can absorb nearly all this radiant energy and can easily attain a temperature of 170 degrees on hot, sunny days. This heat then gets re-radiated in all directions. This heat will end up some place, and the next thing in line is the attic insulation that you have on your ceiling. Eventually, it will heat up also. This is similar to drawing a hot blanket across your home.
In the absence of a radiant barrier, the maximum surface temperature (and not air temperature) of your attic insulation can climb up to more than 130 degrees. When this occurs, your ceiling THINKS and ACTS as if it's over 130 degrees outside. It's no wonder that it's not possible for you to stay comfortable and your air conditioning unit runs without a pause. This is a MASSIVE difference between outside/inside temperatures. The result is that your home uses a great deal of energy (read money) to suck the heat out (with the help of air conditioning) and keep you comfortable.
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