Replacing a dirty, clogged filter with a new, clean one can lower your air conditioner's energy consumption by 5 to 15 percent, according to the US Department of Energy.

According to the International Energy Agency, the number of AC units in buildings across the world should reach 5.6 billion by 2050, up from only around 2 billion units today.

Researchers have developed a new method that can lead to significant energy savings in buildings. The team identified 28 major heat loss regions in a multi-unit residential building with the most ...