Delphi Automotive has introduced a new HVAC system for city buses designed to keep passengers comfortable while improving effi ciency and reducing energy consumption when compared to traditional external roof top bus units. The new Diavia City Bus HVAC delivers uniformlycooled air to passengers regardless of where they are located in the vehicle. Using compact, multiple units installed inside the bus, the system is ductless, modular and uses brushless motors to reduce unit noise. Available for installation by bus body builders and OEMs, the new internal HVAC system joins a the full range of Diavia products suitable for use with ambulances, special purpose vehicles and mobile refrigeration systems.