Maths can be found here.HVAC SEER Savings CalculatorSystem InputsCurrent HVAC Total Capacity (tons): Enter the total cooling capacity of your facility in tons. Current SEER Rating: Existing system’s Seasonal Energy Efficiency Ratio. New SEER Rating: New system’s Seasonal Energy Efficiency Ratio. Operating Hours per Year (hours/year): Estimated number of operating hours per year for the system. Electricity Cost ($/kWh): Cost per kilowatt-hour of electricity used. Demand Cost ($/kW): Cost per kilowatt of peak electrical demand. Carbon Intensity Electricity (lb-CO₂/kWh): This value represents the pounds of CO₂ emitted per kilowatt-hour of electricity consumed. For example, typical U.S. values can be sourced from EPA guidelines. Use this to quantify your environmental impact. Total Implementation Cost ($): Include materials and labor for the new HVAC system. Energy Escalation Rate (%/year): Annual percentage increase in energy cost (if applicable). IRR Calculation Period (years): Select the project duration to calculate the Internal Rate of Return (IRR). 5 Years7 Years10 YearsCalculate Copy ResultsCalculations and SavingsEnergy Savings SummaryCurrent HVAC Power draw: New HVAC Power draw: Demand Saved: Annual Energy Saved: Energy Cost Savings: Demand Cost Savings: Total Cost Savings: CO₂ Emission Savings: Implementation Cost and Simple PaybackImplementation Cost: Simple Payback: Internal Rate of Return (IRR): Economic Life Cycle Analysis