Sub-Contractor 220800-Commissioning of Plumbing 230600-Schedules for HVAC 230900-Instrumentation and Control for HVAC 223500-Domestic Water Heat Exchangers 223600-Domestic Water Preheaters 224100-Residential Plumbing Fixtures 224200-Commercial Plumbing Fixtures 224500-Emergency Plumbing Fixtures 224600-Security Plumbing Fixtures 224700-Drinking Fountains and Water Coolers 225000-Pool and Fountain Plumbing Systems 225100-Swimming Pool Plumbing Systems 225200-Fountain Plumbing Systems 226000-Gas and Vacuum Systems for Laboratory and Healthcare Facilities 226100-Compressed-Air Systems for Laboratory and Healthcare Facilities 226200-Vacuum Systems for Laboratory and Healthcare Facilities 226300-Gas Systems for Laboratory and Healthcare Facilities 226600-Chemical-Waste Systems for Laboratory and Healthcare Facilities 226700-Processed Water Systems for Laboratory and Healthcare Facilities 232500-HVAC Water Treatment 234000-HVAC Air Cleaning Devices 237200-Air-to-Air Energy Recovery Equipment 238300-Radiant Heating Units 232100-Hydronic Piping and Pumps 232400-Internal-Combustion Engine Piping 233100-HVAC Ducts and Casings 233200-Air Plenums and Chases 233300-Air Duct Accessories 233400-HVAC Fans 233500-Special Exhaust Systems 233600-Air Terminal Units 233700-Air Outlets and Inlets 233800-Ventilation Hoods 234100-Particulate Air Filtration 234200-Gas-Phase Air Filtration 234300-Electronic Air Cleaners 235100-Breechings Chimneys and Stacks 235300-Heating Boiler Feedwater Equipment 235400-Furnaces 235500-Fuel-Fired Heaters 235600-Solar Energy Heating Equipment 235700-Heat Exchangers for HVAC 236100-Refrigerant Compressors 236200-Packaged Compressor and Condenser Units 236300-Refrigerant Condensers 236400-Packaged Water Chillers 236500-Cooling Towers 237100-Thermal Storage 237300-Indoor Central-Station Air-Handling Units 232200-Steam and Condensate Piping and Pumps 220000-Plumbing 230000-Heating Ventilating and Air Conditioning (HVAC) 220900-Instrumentation and Control for Plumbing 221200-Facility Potable-Water Storage Tanks 221500-General Service Compressed-Air Systems 223000-Plumbing Equipment 223200-Domestic Water Filtration Equipment 223300-Electric Domestic Water Heaters 223400-Fuel-Fired Domestic Water Heaters 224300-Healthcare Plumbing Fixtures 238200-Convection Heating and Cooling Units 238400-Humidity Control Equipment 233000-HVAC Air Distribution 232000-HVAC Piping and Pumps 235000-Central Heating Equipment 236000-Central Cooling Equipment 237000-Central HVAC Equipment 238000-Decentralized HVAC Equipment 230100-Operation and Maintenance of HVAC Systems 230500-Common Work Results for HVAC 221000-Plumbing Piping 224000-Plumbing Fixtures 235200-Heating Boilers 237400-Packaged Outdoor HVAC Equipment 230700-HVAC Insulation 220100-Operation and Maintenance of Plumbing 220500-Common Work Results for Plumbing 220600-Schedules for Plumbing 237500-Custom-Packaged Outdoor HVAC Equipment 237600-Evaporative Air-Cooling Equipment 238100-Decentralized Unitary HVAC Equipment 221100-Facility Water Distribution 221300-Facility Sanitary Sewerage 221400-Facility Storm Drainage 232300-Refrigerant Piping 223100-Domestic Water Softeners 230800-Commissioning of HVAC 231000-Facility Fuel Systems 231100-Facility Fuel Piping 231200-Facility Fuel Pumps 231300-Facility Fuel-Storage Tanks