Winamac, Indiana, Geothermal Heating & Cooling We're spreading the word throughout Winamac, Indiana: in today's economy, geothermal heating and cooling is absolutely the right choice! Ground conditions in Winamac are perfect. How about our seasonal temperatures? They change enough in extremes to virtually guarantee that geothermal heating and cooling will give you the best year-round satisfaction. You'll love how much a geothermal system can cut your energy expenses, too. The proof? Our Geothermal Savings Calculator. Contact Gast Heating & Cooling Inc. today. We've got quite a bit more to discuss with you about the advantages of geothermal heating and cooling in Winamac. Another great thing, we install and service WaterFurnace geothermal systems, the best on the market.