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Air Conditioning & Refrigeration
Types of Air Conditioning Systems
A few pointers to take into consideration.....
All indoor units used with multi-
- Floor standing units
- Units mounted on walls at high level
- Unit mounted below a ceiling
- Cassette units which recess within a false ceiling and terminate with a grille flush with the false ceiling through which air is supplied and exhausted to the space.
- Ducted units or ‘void pack’ units mounted above a false ceiling and are generally connected to ductwork terminating in the ceiling with supply and exhaust grilles to the space. These ducted units may take the form of ‘low static’ pressure units or ‘high static’ pressure units.
Important:
With reference to Ducted Units, the size and type of the fan motors in these units vary considerably from manufacturer to manufacturer and this determines the extent of the ductwork allowable which is a function of the static pressure of the fan. Silencers may also be provided within the ductwork for very low noise levels required in such spaces as recording studios, but again the fan static pressure available has to be checked carefully so the pressure drop through the silencers may be overcome by the fan.
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