Maths can be found here.Air Saver Nozzle CalculatorAir Saver Nozzle CalculatorSystem InputsPressure (psig): System pressure in psig. Diameter (inches): Current nozzle diameter in inches. Nominal Compressed Air Output (scfm/hp): Nominal compressed air output of the compressor in scfm/hp. Fraction Power at No Production (%): Fraction of power consumed when there is no production (%). Motor Efficiency (%): Efficiency of the compressor motor (%). Number of Openings: Number of nozzles being replaced. Rated Flow of Air Saver Nozzle (scfm): Rated flow of the air saver nozzle at pressure P in scfm. Electricity Cost ($/kWh): Cost of electricity in $/kWh. Operating Hours per Year (hours/year): Operating hours per year in hours/year. Carbon Intensity Electricity (lb-CO2/kWh): This represents the amount of CO2 emissions (in pounds) associated with generating one kilowatt-hour of electricity. This is used to calculate the CO2 emissions you save. If you only care about cost savings, use the default. For the US, average values can be found on the EPA site; use the value associated with your region. Nozzle Material Cost ($): Cost of each air saver nozzle in $. Energy Escalation Rate (%/year): Enter the projected annual percentage increase in energy costs (used for IRR calculation). If you don't want to project future energy cost increase, you can enter '0'. IRR Calculation Period (years): Select the number of years over which to calculate the Internal Rate of Return (IRR). 5 Years7 Years10 YearsCalculate Copy ResultsCalculations and SavingsSavings SummaryAverage Compressed Air Consumption: Compressed Air Reduction: Power Reduction: Electricity Savings: Electricity cost savings: CO2 emission savings: Implementation Cost and Simple PaybackImplementation Material Cost: Simple Payback: Internal Rate of Return (IRR): Economic Life Cycle Analysis