Savings Calculator

The table below shows a typical annual energy cost comparison between geothermal and four traditional HVAC methods. Costs in the table are based on a well-insulated 2,000 sq. ft. single-story home with 3 bedrooms, 2 baths, a living room, family room, laundry room, and a kitchen. The heating and cooling systems in this example were designed for an indoor temperature of 70°F in winter and 75°F in summer. Local weather conditions typical for our service area were used to calculate cooling and heating loads for the home.

In this example, the winter and summer heating and cooling requirement for the home were matched with appropriate HVAC systems and the annual total kWh of electricity, CCF of natural gas, and gallons of oil or propane were calculated for each system . Costs for domestic hot water production are included in our example. For geothermal heat pumps, we calculate the use of an electric water heater in conjunction with the use of a desuperheater (an auxiliary heat exchanger found in most geothermal heat pumps that produce much of the home’s hot water needs as a by-product of the heating and cooling process). Electric water heaters are also calculated for the air-to-air electric heat pump and oil furnace. Gas or propane water heaters at 70% efficiency can be substituted with these systems if desired.

System Type Efficiency Total Annual Annual Costs
kWh ccf/gal
Geothermal 3.5 ton 1 speed 12102 0 $1326.38
4.0 ton 2 speed 11458 0 $1255.80
Air Source
Heat Pump
12 SEER 21850 0 $2394.76
14 SEER 21061 0 $2308.29
Natural Gas 80%/10 SEER 5548 1435 $1883.78
90%/12 SEER 5117 1238 $1661.41
Propane 80%/10 SEER 5548 1561 $5088.13
90%/12 SEER 5117 1346 $4423.84
Heating Oil
(w/Elec. Hot Water)
80%/10 SEER 10989 800 $4289.99
80%/12 SEER 10558 800 $4242.76

The following rate information was used in our calculations. If you pay a different rate, simply enter it below for a more personal example. The rates below are residential rates for Ohio, taken from the Independent Statistics & Analysis Reports by the U.S. Energy Information Administration (EIA).

Annual Cost Calculation Figures*

*Current average residential rates for Ohio, taken from Independent Statistics & Analysis reports by the U.S. Energy Information Administration (EIA). This calculator is based upon a 2000 sq ft home based on the listed utility rates.

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