Nassau County, New York, Geothermal Heating & Cooling We're spreading the word throughout Nassau County, New York: in today's economy, geothermal heating and cooling is definitely the right choice! Soil conditions in Nassau County are perfect. And our seasonal temperatures? They vary enough in extremes to almost guarantee that geothermal heating and cooling will offer the best year-round comfort. You'll also enjoy how much a geothermal system can decrease your energy expenses, too. The proof? Our Geothermal Savings Calculator. Contact ZBF Geothermal today. We've got a lot more to tell you about the advantages of geothermal heating and cooling in Nassau County. Best of all, we install and service WaterFurnace geothermal systems, the finest on the market.