23 50 00 Central Heating Equipment 23 22 23 Steam and Condensate Piping and Pumps 22 62 19 Vacuum Equipment for Laboratory and Healthcare Facilities 22 40 00 Plumbing Fixtures 22 30 00 Plumbing Equipment 22 15 19 General Service Compressed-Air Systems 21 01 00 Operation and Maintenance of Fire Suppression 22 00 00 Plumbing 23 00 00 Heating Ventilating and Air Conditioning (HVAC)

23 70 00 Central HVAC Equipment 23 50 00 Central Heating Equipment 23 09 00 Instrumentation and Control for HVAC 23 05 00 Common Work Results for HVAC 23 01 00 Operation and Maintenance of HVAC Systems 22 40 00 Plumbing Fixtures 22 30 00 Plumbing Equipment 22 10 00 Plumbing Piping 22 05 00 Common Work Results for Plumbing 22 01 00 Operation and Maintenance of Plumbing