- As an option to new CDK’s, KDS Windsor offers conversions of existing S.Y.P. batch kilns to CDK’s (Continuous Dry Kilns). These conversions on average will increase production of the existing batch kiln by approximately 50% while using no additional thermal energy. That represents an approximate fuel savings of 30% per board foot dried. In addition, the lumber is equalized and conditioned for superior surfacing through the plainer and the process improves grade and M.C. STD. deviation over and above what is possible in the batch kilns.