Ductwork
Supply Air Duct
Rectangular supply air ductwork
CIBSE Guide B
Extract Air Duct
Rectangular extract air ductwork
CIBSE Guide B
Circular Duct
Circular / spiral ductwork section
CIBSE Guide B
Controls
Volume Control Damper
Manual or motorised air volume control damper
CIBSE Guide B
Fire Damper
Fire-rated damper in ductwork penetrating fire compartment wall
BS EN 15650 / CIBSE
Room Thermostat
Room temperature sensor / thermostat
CIBSE Guide H
Thermostatic Radiator Valve
TRV for individual radiator temperature control
CIBSE / BS EN 215
Terminals
Supply Diffuser
Ceiling or wall supply air diffuser
CIBSE Guide B
Return Air Grille
Return air grille for recirculation
CIBSE Guide B
Equipment
Air Handling Unit (AHU)
Central air handling unit with filter, coil, and fan sections
CIBSE Guide B
Fan (Axial)
Axial or centrifugal fan
CIBSE Guide B
Heat Exchanger
Plate or cross-flow heat exchanger / heat recovery unit
CIBSE Guide B
Download this chart
Get a free branded PNG image of all 12 symbols. Print it, pin it to your workshop wall, or save it to your phone.