Corunna's Trusted Geothermal Contractor S&J Heating and Insulation, Inc. is the contractor more people in Corunna, Michigan, look to for geothermal installation and service. Our expertise is providing ... an experienced work force – professionally trained, highly skilled, and thoroughly educated about everything geothermal solutions for our customer’s most important geothermal questions installation and service of the highest caliber We're well-known, too, for offering the finest geothermal heating and cooling systems on the market today. Those would be WaterFurnace systems - naturally! If you’d like a little "crash course" on the advantages of geothermal heating and cooling, check out our Geothermal Savings Calculator. Energy savings aren’t the only benefits, of course. Wait till your family experiences the year-round comfort a WaterFurnace geothermal system provides! Better yet, why hold out any longer? Contact S&J Heating and Insulation, Inc. today. You’ll quickly discover why so many Corunna residents are turning to us for their geothermal heating and cooling needs.