The Blast Auxiliary Classic AC was clearly designed with efficiency in mind. The Blast Auxiliary Portable AC screams practicality, just based on the numerous features and options baked into its carriable frame. The power input, for one, does not draw too much energy, which helps you save on bills. You won't see any major dips in cooling or overheating of the hardware, this we can assure you of. And, surprisingly, Blast Auxiliary's claim that this Blast Auxiliary Desktop AC offers a twenty-fold improvement in efficiency over a standard wall mounted window AC checks out.