Calculator Climate Control Sizing Analysis What is the amount of CFM you will need? Total System Demand in CFM How often do you want the compressor to run in an hour? Compressor Capacity in % of an hour Enter air receiver tank size. Tank System Storage in Gallons Will you be using a duplex system? Check here for a duplex system Compressor Capacity in CFM Pressure Switch Settings (Stop) in PSI Pressure Switch Settings (Start) in PSI Tank CuFt (High) Tank CuFt (Low) Pump up time Bleeddown Total Starts per hour* Duty Cycle* Compressor CIM System CIM Warnings: * Divide by two for values per pump in a duplex system.