Air conditioner Via Flickr - jeffk

Americans spend an enormous amount of money on cooling their homes every year. To be precise, air conditioners consume more energy than any other appliance in the average American home, accounting for about 16 percent of residential electricity use annually. Finding ways to reduce your cooling energy consumption is therefore a great way to cut energy bills and reduce your greenhouse gas emissions, too.

Go AC Green’s Cool-N-Save can purportedly cut your air conditioning bill down by 30 percent and has been featured on sites like Treehugger and shows like Living with Ed. It works by adding mist to the air. Here’s how they describe the process:

Hot air from the condenser unit’s fan raises the flap on the patented Cool-n-Save™ control valve allowing water to flow to the misters that surround the AC unit. When the ultra-fine mist is released into the air, it evaporates almost instantly creating what is known as a “Flash Evaporation,” which literally sucks heat out of the air as water absorbs the energy it needs to evaporate. The result of the immediate evaporation constitutes a substantial drop in ambient temperature without wetness—up to 30 degrees Fahrenheit.

The patented system is supposed to install without tools in five minutes to virtually any regular home air conditioning system. The system can be purchased for about $100, although you may have to also purchase the Cool-N-Save Water Expansion Kit if you have a larger condenser (in excess of 3.5 tons) for an additional $15. Filters are also available to ensure there’s no build-up from hard water.