The NCC 2019 Pump System Calculator assists in understanding and applying NCC Volume One Part J5.7 Pump System DTS Provisions for energy efficiency. The calculator is a MS Excel file containing multiple worksheets, navigated via a customised ribbon. It requires macros to be enabled to function correctly. A help guide is available in the calculator and provides instructions on its use. This calculator has been created and designed for Excel 2010, and newer, for Windows. Compatibility with other versions and operating systems is not guaranteed. This calculator is for use with NCC 2019 Volume One.