Method: Pressure reduction is: ΔP = Existing Pressure − Reduced Pressure Estimated compressor power reduction is: Power Reduction (%) = ΔP × Power Reduction Factor New compressor power is: New Power = Existing Power × (1 − Power Reduction %) Annual energy savings are: Energy Savings = (Existing Power − New Power) × Operating Hours Annual cost savings are: Cost Savings = Energy Savings × Electricity Tariff The default 7% per bar value is an editable screening assumption, not a universal compressor-performance relationship. Actual savings depend on compressor type, controls, operating point, pressure ratio, system demand, storage, leakage and how compressor power responds to reduced discharge pressure. Reducing system pressure can also reduce artificial demand and compressed-air leakage, which may provide additional savings not included in this calculator. Before reducing pressure, verify that pressure at critical end-use equipment remains adequate after distribution-system pressure losses. For detailed energy audits, use measured compressor power at the existing and proposed pressure conditions whenever possible.