As the summer heats up so will your power bill. But with Mistbox attached to your AC unit, you can significantly lower the cost of keeping cool. Mistbox is a universally compatible, connected device that attaches to your existing AC unit in minutes. It uses evaporative cooling to pre-cool the intake air, which makes your AC more efficient. The resulting efficiency boost means shorter run times and savings of 20-38% on your cooling bills. A funded Kickstarter.