22 00 00 Plumbing 22 30 00 Plumbing Equipment 22 40 00 Plumbing Fixtures 23 09 00 Instrumentation and Control for HVAC 23 20 00 HVAC Piping and Pumps 23 21 00 Hydronic Piping and Pumps 23 00 00 Heating, Ventilating and Air Conditioning (HVAC) 23 34 00 HVAC Fans 23 52 00 Heating Boilers 23 83 00 Radiant Heating Units 28 30 00 Electronic Detection and Alarm

23 33 00 Air Duct Accessories 23 36 00 Air Terminal Units 23 37 00 Air Outlets and Inlets 23 40 00 HVAC Air Cleaning Devices 23 51 00 Breechings, Chimneys and Stacks 23 55 00 Fuel-Fired Heaters 23 83 00 Radiant Heating Units 23 07 13 Duct Insulation 23 20 20 Direct Buried Piping (Pre-Insulated) 23 33 55 Sound Enclosures & Attenuators 23 34 23 Power Ventilators 23 72 25 Energy Recovery Units 23 73 23 Custom Air Handling Units 23 83 10 Infloor Radiant Heat

23 55 00 Fuel-Fired Heaters 23 81 00 Decentralized Unitary HVAC Equipment 23 82 00 Convection Heating and Cooling Units 23 83 00 Radiant Heating Units

23 34 00 HVAC Fans 23 83 00 Radiant Heating Units

22 00 00 Plumbing 22 30 00 Plumbing Equipment 22 40 00 Plumbing Fixtures 23 07 00 HVAC Insulation 23 09 00 Instrumentation and Control for HVAC 23 20 00 HVAC Piping and Pumps 23 30 00 HVAC Air Distribution 23 34 00 HVAC Fans 23 52 00 Heating Boilers 23 83 00 Radiant Heating Units