Online Calculators

Here are some tools available to help determine costs:

Heat Pump vs Gas:
http://www.energyguide.com/ha/hvacQCCalc.asp?sys=heat&referrerid=72&sid=454&bid=tva

Fuel Comparison:
www.eia.doe.gov/neic/experts/heatcalc.xls

Heating Calculator:
www.energyexperts.org/CalculatorsTools/HeatingCostCalculator.aspx

Cooling Calculator:
www.energyexperts.org/CalculatorsTools/AirConditioningCostCalculator.aspx