HVAC Service / Preventative Maintenance HVAC Equipment Service & Maintenance United Mechanical & Electrical, Inc. has service expertise in the following: Air Handlers Boilers Burner Controls Chillers Compressors Cooling Towers Duct Systems Fans Filtration Fluid Pumps Heat Pumps Humidity Control Motors Package Units Refrigerant Conversions Refrigeration Systems Split Units Variable Frequency Drive VAV Boxes VRF Systems