Hot Savings

In the fight against climbing utility bills, more Maryland homeowners are turning to geothermal heat and air conditioning for relief

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Geothermal tips

For homeowners who are considering geothermal heating and cooling, here is some advice from the experts:

Start with less costly improvements, such as better insulation, energy-efficient appliances and passive solar, says Brad Rogers, a principal in Baltimore Green Construction. "Geothermal is an answer to the question, but it is not a substitution for the question."

Consider the location of your home. It costs more to drill through rock than sandy soil. Costs also depend on how many feet of vertical pipe are needed (it takes about 200 feet of vertical bore to provide 1 ton of heating/cooling, and most homes need a few tons). A home may need ductwork for forced air and different work for radiant floors.

Deal with professionals who have experience and training. HVAC mechanics and well drillers are state-licensed. The International Ground Source Heat Pump Association, located at Oklahoma State University in Stillwater, Okla., offers training and certification for design and installation. Check warranties on installation and on all components; they should be checked regularly and maintained.

Look for savings. The IRS has builder incentives, but no homeowner incentives at present. The tax code is a moving target, so talk to your accountant.

For more information, start here: eere.energy.gov/geothermal (U.S. Department of Energy).

Andrea F. Siegel