The new Celeris(R) 2 control platform retainsPhoenix Controls’(Newton, MA) venturi valve as the primary component, and addsLONWORKS(R) technology to create a distributed control architecture. Using the LonTalk protocol, the Celeris 2 controllers distribute control functions and share data to create an efficient and cost effective environmental control system for temperature, humidity, occupancy, and ventilation control functions.