SANDY HOOK, Conn. – The finalization and transfer of Johnstone Supply’s Data Services DSPro software division to DDI System was completed the first of this year. According to DDI, with this acquisition, the company posses the technology and industry expertise to be the premier solution provider for HVAC distributors. According to Johnstone Supply, this acquisition is the direct result of months of research from Johnstone Supply corporate to seek out and determine the best next step for their DSPro software users.