RGF O3 Systems Inc., of West Palm Beach, Fla., has developed a high efficiency corona discharge ozone generator module, the RGF Model HEC. The new design incorporates several design advances in corona discharge technology achieving 20 grams/hour ozone levels per module at 5 percent by weight concentration from an air-cooled system. These levels are typically only achievable by water-cooled generators. The design utilizes a solid-state, high frequency drive module to power the corona cell.