24-7 Service For HVAC Emergencies. Jack Kite Co. of Bristol, TN, has been proudly providing heating and air conditioning services to the greater Tri-Cities area since 1975. We are mechanical contractors specializing in HVAC sales, service and installation for commercial, industrial and residential clients. We are on call 24 hours a day, 7 days a week to take care of all your HVAC emergencies....