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Trane was the first to develop a hermetic, centrifugal refrigeration machine (Turbo Vac) and over the decades they have continued to invent ground-breaking air conditioning systems. The latest is CenTraVac, which received the US Environmental Protection Agency award, "Best of the Best". Water cooled HVAC systems are available for a complete integrated and energy efficient solution in the home or work place. For traditional heating in the home, Trane also offers gas furnaces or oil furnaces that typically operate at around ninety five percent efficiency.