When it comes to choosing an air conditioner, one of the most crucial factors is its energy efficiency. With the growing concerns about climate change and the increasing cost of energy, it is essential to choose an AC that consumes less energy and provides maximum cooling. Window AC and Split AC are the two most commonly used air conditioners, but which one is more energy-efficient? In this article, we will discuss which AC is more energy-efficient, Window AC or Split AC, and why. Window AC vs. Split AC: Energy Efficiency Window AC and Split AC differ in their construction and design, and hence their energy efficiency. A Window AC is a single unit that is installed on a window or a hole in the wall. On the other hand, a Split AC has two separate units- an indoor unit and an outdoor unit, which are connected by a refrigerant line. Window AC is less energy efficient than Split AC, as it requires more power to cool the same space. This is because Window AC is a single unit and has limited