The Mach 3 P.S. ™ helps you avoid that frustration. It's an air conditioner designed to use less power without sacrificing cooling performance. So you can stay cool and comfortable, using the power that's left over to enjoy more of the electrical appliances in your RV. When we designed the Mach 3 P.S. ™, we had a very high standard of performance in mind: the RV world's most popular air conditioner, our Coleman (R)-Mach (R) 3 PLUS ™. We wanted an AC that would produce as much of the cooling performance of the Mach 3 PLUS ™ as possible, but one that would use even less electrical power. As you can see from the chart, the high-efficiency Mach 3 P.S. ™ actually out cools our Mach 3 PLUS ™.