Two-stage cooling means that your cooling unit has two levels of operation. When summer is its warmest, the high setting starts up, and when it’s cooler or more mild, the low setting handles the duties. Typically, the lower setting will take care of your cooling needs, but even when the high setting kicks in, you may not realize it because it can maintain such even temperatures for your comfort. This can also mean a quieter cooling system, greater efficiency, and enhanced humidity control.