About Cosby Heating and Cooling Knox County's Expert Geothermal Source If you are looking for a company that has a complete in-house operation and a documented track record for providing homeowners with all of their WaterFurnace Knox County geothermal heating and cooling needs, you can trust Cosby Heating and Cooling. Our total in-house operation includes... planning assistance. complete comfort system installation. routine service and maintenance. emergency repair. energy-saving advice and consultation. Providing total customer satisfaction is our highest priority in the Knox County area, and our fully qualified professional staff will see to that.It's difficult not to be satisfied when you choose the best heating and cooling system on the market today. We will see to it that your new system lives up to all of your expectations, helping you to save big money on your energy costs and improve your home's conditioning efficiency. Contact Cosby Heating and Cooling today to get a free estimate and a cost savings analysis for your home.