A couple of known facts about electrical machinery are: 1) they run much less efficiently when the ambient temperature goes up and 2) they use appreciably less electricity when they run cooler. Air conditioners are no exception, especially residential systems which all use air-cooled outdoor condensers. In fact, their energy demand during a heat wave is the main cause of overdraw on the power grid, leading to power interruption. In many areas they represent three-quarters of the peak load. For the consumer this means a painful and unpredictable expense. Our HelioMist, a simple add-on device that significantly reduces air conditioner electricity consumption. Our product, which costs the household consumer at most a few hundred dollars and installs next to an existing air conditioner in less than an hour, instantly saves 20-30% on this load, as shown by our performance results at PG&E’s Technological and Ecological Services Lab is shown below: This translates to a potential $7B per year savings for consumers to cool the 60 million U.S. residences equipped with air conditioners. And this savings will continue to soar as energy prices climb and as the population continues shifting to the hottest climates of the U.S. such as Phoenix, Las Vegas and Miami. It also provides electric utilities a cost effective solution that is multiple times cheaper than building a new power plant to mitigate summer peak energy demand.