The Rheem-Ruud Commercial Water Heater Institute is going strong with an attendance level of 500 students. In June 2003, Rick Penn, an outside sales representative for Hughes Supply, was the 500th person to complete the program. The institute, which trains students how to sell, install and service commercial water heaters, was established in 1998 and is open to all Rheem-Ruud wholesaler-distributors and their contractor customers.