Billy C. Langley

• Fundamentals of Air Conditioning Systems
• Fundamentals of air conditioning systems
• Heating, ventilating, air conditioning, andrefrigeration
• High-Efficiency Gas Furnace Troubleshooting Handbook
• Air conditioning and refrigeration troubleshooting handbook
• Comfort Heating
• Electric controls for refrigeration and air conditioning
• Electricity for Refrigeration and Air Conditioning
• Fine Tuning Air Conditioning and Refrigeration Systems
• Heat pump technology systems design installation and troubleshooting