Example Air handling unit
| Number | category | assignment | specification | BUDO |
|---|---|---|---|---|
| 1-20 | system | air handling unit | - | AHU |
| 1 | medium | air | extract air | AIR+ETA |
| 1 | subsystem | fan | - | FAN |
| 2 | medium | air | extract air | AIR+ETA |
| 2 | subsystem | humidifier | - | HUM |
| 3 | medium | air | extract air | AIR+ETA |
| 3 | subsystem | heat exchanger | - | HX |
| 4 | medium | air | exhaust air | AIR+EHA |
| 4 | subsystem | damper | - | DAMP |
| 5 | medium | air | extract air | AIR+ETA |
| 5 | subsystem | damper | - | DAMP |
| 6 | medium | water | - | WS |
| 6 | subsystem | heat recovery system | - | HRCS |
| 6 | subsubsystem | valve | three-way valve | VAL+TWV |
| 7 | medium | water | - | WS |
| 7 | subsystem | heat recovery system | - | HRCS |
| 7 | subsubsystem | pump | - | PU |
| 8 | medium | air | fresh/outside | AIR+ODA |
| 8 | subsystem | damper | - | DAMP |
| 9 | medium | air | mixed air | AIR+MIA |
| 9 | subsystem | heat exchanger | - | HX |
| 10 | medium | air | supply air | AIR+SUP |
| 10 | subsystem | fan | - | FAN |
| 11 | medium | air | supply air | AIR+SUP |
| 11 | subsystem | cooler | - | C |
| 11 | subsubsystem | heat exchanger | - | HX |
| 12 | medium | air | supply air | AIR+SUP |
| 12 | subsystem | preheater | water pre-heater | H.PR+WS |
| 12 | subsubsystem | heat exchanger | - | HX |
| 13 | medium | air | supply air | AIR+SUP |
| 13 | subsystem | sewage, water, gas plant | separator facility | SWG+SEP |
| 14 | medium | air | supply air | AIR+SUP |
| 14 | subsystem | reheater | water re-heater | H.PR+WS |
| 14 | subsubsystem | heat exchanger | - | HX |
| 15 | medium | air | supply air | AIR+SUP |
| 15 | subsystem | humidifier | - | HUM |
| 16 | medium | air | supply air | AIR+SUP |
| 16 | subsystem | preheater | water pre-heater | H.PR+WS |
| 16 | subsubsystem | pump | - | PU |
| 17 | medium | air | supply air | AIR+SUP |
| 17 | subsystem | preheater | water pre-heater | H.PR+WS |
| 17 | subsubsystem | valve | three-way valve | VAL+TWV |
| 18 | medium | air | supply air | AIR+SUP |
| 18 | subsystem | cooler | - | C |
| 18 | subsubsystem | valve | - | VAL |
| 19 | medium | air | supply air | AIR+SUP |
| 19 | subsystem | reheater | water re-heater | H.PR+WS |
| 19 | subsubsystem | pump | - | PU |
| 20 | medium | air | supply air | AIR+SUP |
| 20 | subsystem | reheater | water re-heater | H.PR+WS |
| 20 | subsubsystem | valve | three-way valve | VAL+TWV |