Cold Tube demonstration in Singapore (IMAGE) Princeton University, Engineering School Caption The "Cold Tube," is an an outdoor pavilion made of radiant cooling panels, which provide cooling to passersby without cooling the air. Credit Photos courtesy of the researchers Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.