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Design of Ductwork Systems

Upcoming Courses 
Key Areas  
Course Content
Learning Outcomes
Who Should Attend
Course Timings
Course Fees
In-House Training

A full overview and agenda, need to know information, and booking instructions can be found on the individual upcoming course pages. Click on a course below to view.

Upcoming Courses 

26th November 2019 | London - Find out more

Key Areas  

This course programme includes ductwork types & characteristics, sizing, velocities, diffuser grille & fan connections, bends, dampers, attenuators, system layout balancing and noise.

Course Content

Session 1
  • Introduction
  • Duct Sizing Methods: Relationship between volume, size, air velocity and resistance
  • Static, velocity and total pressures and pressure diagram
  • Constant friction, constant velocity and static regain methods
  • Velocity Limits: Limiting velocity for noise in different applications
  • Duct Distribution Systems: Tree system (mains, sub mains and branches)
  • Octopus (modular plant)
  • Ring main

Session 2
  • Plant Connections: Inlet and outlet connections to centrifugal and axial fans
  • Silencers
  • Connections to terminals
  • Flexible connections

Session 3
  • Room Air Distribution: Limits for different terminals
  • Effect of supply temperature
  • Perforated ceilings
  • Displacement ventilation
    Ductwork Types: Circular and rectangular

Session 4
  • Damper Types & Characteristics: Opposed blade, parallel blade, iris and other methods of controlling volume
  • Noise: Brief introduction to noise including sound power and sound pressure. Noise criteria and noise rating. Control of noise
  • Attenuator: Square end, round end and aerofoil. Positioning of attenuators.  
  • Commissioning: Brief introduction to good commissioning practice. Design requirements to facilitate commissioning. Interpretation of commissioning records.

Learning Outcomes  

The delegates will gain the attention to detail at design stage to minimise problems when commissioning.

Who Should Attend  

Delegates should have had a formal academic (B Eng.) followed by a few years of experience or have been working as Technicians/draftsmen/Cadd operators.

Course Timings 

Registration will be at 09.30
Start Time: 10.00
Latest Finish: 17.00

Course Fees 

  • Members Rate: £336 (£280 ex VAT)
  • Standard Rate: £372 (£310 ex VAT)

In-house training at your site

Training multiple staff at once is the most cost effective way to develop staff for organisations. All our courses can be delivered at your site (min 6 staff) at discounted rates. These In-House courses are only available in the UK and Europe. For an In-house quote please email; 
Name of course, approximate number of staff and your site address 

To contact the CIBSE Training Team with a query please

Email: or call: +44 (0)20 8772 3660