Radiator Labs, the innovative radiator retrofit working to bring steam into the 21st Century, and the regional winner from MIT in the 2012 DOE National Clean Energy Business Plan Competition, is a semi-finalist in the Engadget Insert Coin: New Challengers, a new competition aimed at helping to make dream gadgets a reality. The contest will bring together Engadget editors, readers, and a panel of expert judges to help choose tech's next great gadget. The winner will be crowned at Expand, taking home a cash prize and a guaranteed Engadget review. Vote now for your favorite gadget on their site, and good luck to Radiator Labs!