The Griswold Controls Product Selection App allows the user to size and select Valve Cvs based on fluid flowrate (gpm) and desired pressure drop (psid) for the Griswold QuickSet® Manual Balance Valves and the Griswold Actuated Ball Valves, Unimizer® and Automizer® used in HVAC Hydronic systems. Pipe velocity calculator based on pipe size and fluid flowrate is also included as well as Bluetooth option to connect the app to the Transducers and EPIC/FIT Energy System sold by Griswold Controls to manage end user valves energy data.