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Believe it or not, 40% of energy is wasted through our doors and
windows!
So, in order to utilize energy more efficiently, we need to start
with our doors and windows. And in the summer time, that means also
dealing with the source of the heat - the sun! |
There are three basic ways how energy is transmitted: conduction,
convection, or radiation. Here, we will be focusing
on radiation since it is how energy gets from the sun to the earth,
and it is also how energy moves from outside your windows to inside
your house. |
Assuming the walls and ceiling of your house are well insulated, the
major source of energy going into your house is through your windows
in the form of light (sunlight).
There are three major groups of light in the sun light - infrared,
visible light, and UV ray.
When light travels through the glass of your window, infrared is absorbed
by the glass and transformed into heat that warms up your window.
Visible light and UV ray go through the glass and are absorbed by
the solid surfaces within your house. This absorbed energy then is
transformed into heat that warms up your entire house, especially
the high-energy UV ray.
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What do we do? >>
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