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A special white paint developed at the University of South Florida could offer a new way to cool buildings, reduce energy consumption and lessen reliance on air conditioning. Created in the lab of Distinguished University Professor Yogi Goswami, the innovative self-cooling paint is applied to roofs and reflects up to 98% of sunlight.

It has been demonstrated to cool surfaces by up to 13.5 degrees below ambient air temperature during outdoor testing. By reducing the amount of heat buildings absorb, the technology could help lower cooling costs and energy use.

Climbing global temperatures and growing demand for energy-efficient cooling solutions inspired Goswami to invent the self-cooling paint. He noted that 25% of all energy used in the United States goes toward cooling buildings. At the same time, air conditioning is becoming more common in Europe, where it has not traditionally been the norm, while countries with large populations, such as India and China, are gaining greater access to cooling technologies.

"It won't be difficult for this paint to reduce energy bills by 50%. That would be a huge win for energy use in this country and the world," said Goswami, a USF professor.

What makes the paint unique is its ability to use outer space's absolute zero temperature as a heat sink. Earth's atmosphere has a natural window that allows certain wavelengths of heat to pass through instead of becoming trapped near the surface.

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