Energy Efficient Windows (page 2)

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Author: Lori Soard


Insulated curtains are more energy efficient than curtains made of regular material. Why? One of the ways heat travels is through conduction, when heat moves from a warmer area to a cooler one. However, thicker materials are better insulators—that is, they tend to prevent conduction from occurring as rapidly. Interestingly enough, the best insulator is nothing at all, because heat can’t travel by thermal conduction through a vacuum! That’s why manufacturers of insulated food and beverage containers often nest two flasks together and suck all of the air out of the space in between. Heat is only able to effectively leave via conduction through the top of the container, and only a little is lost through the sides due to minimal conduction and some thermal radiation.

So how much less energy might the average household use by adding thermal curtains to heated rooms? Is the cost of insulated curtains worth it if you weigh it against the money you might save? Thermal curtain manufacturers estimate that homeowners can save up to 25% on their home’s energy bill, and the US Department of Energy recommends that homeowners use insulated curtains to save money. Can you find any other methods to help save some money on your family’s energy bill? Use your creativity, and apply what you’ve learned about heat and heat conduction!

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