Gilman Geothermal Heating & Cooling Contractor In Gilman, Iowa, the geothermal heating and cooling contractor to call is Latcham Enterprises. Our geothermal knowledge is second to none. And we provide the best products available in Gilman - or anywhere else, for that matter: WaterFurnace geothermal heating and cooling systems! Take a look at our Geothermal Savings Calculator. It'll show you the best reason for going geothermal. The monthly savings are huge! We can tell you plenty of other good reasons, too. And when you’re ready install? We'll make sure that your WaterFurnace geothermal heating and cooling system is installed - and serviced – right! Contact Latcham Enterprises today.