23 00 00 "Heating, Ventilating, and Air-Conditioning (HVAC)"
23 09 00 Instrumentation and Control for HVAC
23 09 13 Instrumentation and Control Devices for HVAC 23 09 13.13 Actuators and Operators 23 09 13.23 Sensors and Transmitters 23 09 13.33 Control Valves 23 09 13.43 Control Dampers 23 09 23 Direct-Digital Control System for HVAC 23 09 23.11 Control Valves 23 09 23.12 Control Dampers 23 09 23.13 Energy Meters 23 09 23.14 Flow Instruments 23 09 23.16 Gas Instruments 23 09 23.17 Level Instruments 23 09 23.18 Leak Detection Instruments 23 09 23.19 Moisture Instruments 23 09 23.21 Motion Instruments 23 09 23.22 Position Instruments 23 09 23.23 Pressure Instruments 23 09 23.24 Speed Instruments 23 09 23.27 Temperature Instruments 23 09 23.33 Vibration Instruments 23 09 23.43 Weather Stations 23 09 33 Electric and Electronic Control System for HVAC 23 09 43 Pneumatic Control System for HVAC 23 09 53 Pneumatic and Electric Control System for HVAC 23 09 93 Sequence of Operations for HVAC Controls 23 09 93.11 Sequence of Operation for HVAC DDC