For many homeowners, it may seem like a galaxy far, far away even though it lies right over their head: their attic.

The U.S. Department of Energy seems to know how galactic a challenge many homeowners face when they want to venture into their attic and inspect the condition of the insulation. To help prepare them for this odyssey, the department has brought the exercise back down to earth in the form of some straightforward steps.

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If you're not this type of person, then you probably know somebody who is: the type who blasts cold air through the air conditioner while driving with the window cracked open on a warm day.

Fundamentally, this person appreciates the value of ventilation, or trying to achieve a healthy balance between warm and cool air.

If not in the car, you're likely to appreciate the value of ventilation in your home on those cool Las Vegas nights, when you can turn off the air conditioner, open your windows and let the cool breezes “air out” your home. Your indoor air feels refreshed because ventilation:

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It could be a fun weekend project for the entire family. It could morph into a science experiment for your favorite science student. It might even be both, but one thing is for certain: a do-it-yourself home energy audit can give you the information you need to give your energy bills the cold shoulder.

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