We're the Geothermal Source in Benzonia! Benzonia residents in the know turn to D&W Mechanical for all their geothermal heating and cooling needs. They count on us to give not only the proper installation and service but also the knowledge to help them maximize the potential from their geothermal systems. Considering a geothermal system of your own? Give our nifty little Geothermal Savings Calculator a try. Just fill-in your data and marvel at the results. Then, contact us, the Benzonia, Michigan, geothermal experts at D&W Mechanical.