Ceiling Fan Light Cover Replacement, Park your car in a sunny spot on your driveway. Get in, mark the time, close the vents and roll up the windows. It starts getting pretty warm pretty quick, eh? You've just experience a concept known as direct gain energy. The power of the sun is more than sufficient to create heating and lighting if it is manipulated to hit your home in the right way.
Direct gain is a concept that has existed for thousands of years.Ceiling Fan Light Cover Replacement Before electricity was in abundant supply, ancient societies planned entire structures around the concept. You can learn from their experience.