Pioneer Heating & Air Conditioning, Inc. Share: HVAC Repairs/ReplacementHome Repairs/Remodeling Pioneer Heating & Air Conditioning, Inc. Visit Website Request Info 4604 Mill Branch Ln. knoxville, TN 37938 (865) 922-2817 Facebook About Map About Pioneer is a family-owned company that has been working for 38 years at being Knoxville's most trusted name in home comfort. We specialize in residential and commercial properties. What's Nearby? Distance: 5 10 15 20 25 50 mi.