We're the Geothermal Source in Benzonia! Benzonia residents in the know look to D&W Mechanical for all their geothermal heating and cooling needs. They place their confidence in us to give not only the proper installation and service but also the experience 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.