Anyone who has ever sat next to sunny a window in late summer knows exactly what passive solar energy is.
Passive solar heating and cooling represents an important step in conserving energy in the home and solar energy has become a hot topic in recent years.
Solar energy is nothing new however, people throughout time have been able to use this seemingly recent technology. The ancient Greeks used solar design in their architecture. They clearly understood that a building facing South could take advantage of the sun's heat during winter time.
