Discover one of our 28 local entrepreneurial communities »
Be the first to know as we launch in new countries and markets around the globe.
Interested in bringing MIT Technology Review to your local market?
Unsupported browser: Your browser does not meet modern web standards. See how it scores »
A prototype system can heat and cool without draining battery power.
Evaporative cooling plus drying with desiccants equals cool air for less cost.
Utilities are installing devices that make ice at night to replace air-conditioning during times of peak power demand.
Developers think these phase-change materials could reduce the need for air-conditioning.