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