Furnace maintenance in Buford, Georgia. Two systems. Changed filters. Changed uv bulbs. Tested mechanical and electrical components, all in good shape. Found systems with no surge protection, recommend installing surge protection to protect equipment from power surges. Neither system has a hard start kit installed. Recommend installing hard start kits to take a load off compressors so they start smoother, run smoother, and therefore last longer. Systems are heating at this time.