Have you ever wondered what the electric bill was for the Hancock building in Chicago, or the Empire State Building in New York? Someone owns those buildings, and buildings like them in every major city in the world. Their is an electric bill that get paid every month, just like the one for your home – except this one is much, much bigger.
The expense to run, maintain and own a big high rise can be astronomical. So every little bit helps when it comes to saving money.
Low-E technology is saving commercial building owners a lot of money within their architectural glass application. Low -E stands for low thermal emissivity. Emissivity is the level given to things that radiate thermal energy. Low-E does two things: it keeps heat out in the summer, and keeps heat inside in the winter.
How does it do this? In a nut shell, the glass does not allow heat to pass through it very easily. Normally, windows allow heat to escape through the glass in the winter, and heat to come in during the summer. Heat can pass through glass. The low-e glass acts as a shield, and like insulation, makes it very hard for the heat to pass through, either way.
If you can imagine a large building with many normal windows, compared to a large building with low-e windows. The building with traditional windows will constantly allow heat to escape the building in the winter, and heat to enter the building in the summer. This means that the thermostat is running much more than it should be. When the thermostat runs, it costs the owner money.
If a skyscraper is built with low-e windows, the building will maximize cost savings by keeping heating and cooling bills down throughout the year.