Our Paycheck Withholding Calculators Check your withholding!   To see all calculators click here Air Conditioner Savings Comparison Central Air Conditioner Informationof Present Air Conditioner:Select present air conditioner age More than 20 years old 10 to 20 Years old Less than 10 years old Cost of New Air Conditioner?: SEER of Proposed New Air Conditioner: Tax Credit or Utility Rebate for high SEER: (Rebates for Zip Submit Fed Creditshere) Estimated Electricity Cooling Cost Last 12 Months: Estimate Your Last Years Cooling Costs Highest Monthly Electric Bill Lowest Monthly Electric Bill AC Doctor's online Energy Calculators help you determine the effect that high-efficiency cooling and heating solutions can have on your finances and your environmental footprint. Start by entering your zip code so our calculator can approximate how many hours your HVAC system will run per year, then adjust each of the other fields having a white background.