Features of Good ventilation design

1. Not noisy
2. Concealed
3. No draughts
4. Efficient fan
5. Good control of air flow with dampers and appropriate diffusers.
6. Good control of room temperature.
7. Appropriate duct sizes.
8. Well supported ducts and equipment.
9. Prevent spread of smoke in the event of a fire with smoke/fire dampers.
10. Ensure that supply air is clean by using a filter.
11. Ensure that vermin cannot enter the duct system by using a bird/insect screen in the fresh air intake.
12. Minimise risk of infection in some buildings (e.g. hospital) by having no recirculation duct.
13. Use recirculation duct in some buildings to save energy.
14. Use appropriate air change rates to meet room requirements.
15. Use appropriate fresh air rate to meet room occupants’ requirements.
16. Use suitable system to fit in with building aesthetics.
17. Avoid duct leaks by using proper jointing method.

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